taxonID	type	description	language	source
F27D87B72D008C3BFEABFEFE925A37C9.taxon	description	(Fig. 3 A)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D008C3BFEABFEFE925A37C9.taxon	materials_examined	Type material. Holotype: adult male, 3 mm, MNRJ 20960. Paratypes: adult female, 3.3 mm, MNRJ 20945; adult male, MOUFPE 16076; 2 mancas, 2 adult females, MNRJ 18727; 1 manca, MNRJ 20955; 1 male, MNRJ 20953; 1 female, MNRJ 20959; 1 female, MNRJ 20956; 1 female, MNRJ 20947; 1 female, MNRJ 20949; 1 female, MNRJ 20944; 1 female, MNRJ 20958; 1 manca, MNRJ 20950; 1 male, 1 female, 1 manca, MNRJ 20954; 1 female, MNRJ 20952; 1 female, MNRJ 20961; 1 female, MNRJ 20951; 1 female, MNRJ 18697; 1 female, MNRJ 20943; 2 mancas, MNRJ 20946; 1 male, 1 manca, MNRJ 20957; 1 female, MNRJ 18956; 1 manca, MNRJ 18961; 1 manca, MNRJ 18722; 1 female, MOUFPE 16073; 1 female, MOUFPE 16074; 1 female, MOUFPE 16075; 1 fragment, MOUFPE 16077. Type locality. Oceanprof II – BC Sul, OPII # 84 (22 ° 26 ’ 28.8 ’’ S 39 ° 58 ’ 53.3 ’’ W), off RJ, Campos Basin, Brazil. Geographic distribution. Brazil, Alagoas-Sergipe Basin (AL-SE) (12 ° 21 ’ 24 ’’ S 35 ° 53 ’ 37.7 ’’ W – 11 ° 42 ’ 50.5 ’’ S 37 ° 07 ’ 07.5 ’’ W), Espírito Santo Basin, ES (19 ° 32 ’ 38.7 ’’ S 37 ° 07 ’ 07.5 ’’ W – 19 ° 54 ’ 31 ’’ S 39 ° 36 ’ 56.8 ’’ W), Campos Basin, RJ (22 ° 11 ’ 00 ’’ S 39 ° 52 ’ 00 ’ W – 22 ° 33 ’ 00 ’’ S 39 ° 54 ’ 00 ’’ W). Habitat. Marine, deep-sea benthic, found between 400 – 1,950 m depth. Current systematic position. Gracilimesus campensis Santos-Silva and Souza-Filho, 2019.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0F8C3AFC77FE87912231D6.taxon	description	(Fig. 4 A)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0F8C3AFC77FE87912231D6.taxon	materials_examined	Type material. Holotype: male, 2.5 mm, MZUSP 4561. Paratypes: 2 males, 1 female, 1 juvenile, MNRJ 6277; 6 male, 5 female, 11 juveniles, MZUSP; 2 males, 1 female, USNM; 3 males, 1 female, IOUSP (Pires, 1982). Type locality. Flamengo Inlet (23 ° 30 ’ 46.8 ” S 45 ° 06 ’ 36.6 ” W), Ubatuba, SP, Brazil. Geographic distribution. Brazil (RJ, SP) (Pires, 1982; Pires-Vanin, 1998). Habitat. Found in shallow water among algae, mussel beds and under stones (Pires, 1982; Pires-Vanin, 1998). Current systematic position. Carpias nereus (Pires, 1982). Remarks. Currently, the genus Bagatus is considered a junior synonym of Carpias Richardson, 1902 (Bowman and Morris, 1979; Boyko et al., 2023). The paratypes deposited at Museu Nacional from Praia do Forte, Cabo Frio, RJ, are registered as the voucher number MNRJ 6277. Pires (1982) included this material as a paratype but did not give a voucher number.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0F8C3BFEB2FFA295633640.taxon	description	(Fig. 3 B)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0F8C3BFEB2FFA295633640.taxon	materials_examined	Type material. Holotype: adult female, 15 mm, MOUFPE 15535. Paratypes: 1 adult female, MOUFPE 15536; 1 manca, MOUFPE 15540; 1 adult female, MOUFPE 15541; 1 manca, MNRJ 20854; 1 manca, MNRJ 20856. Typelocality. Station Ext 3 Lead 2 # 1 (19 ° 54 ’ 31.1 ’’ S 39 ° 36 ’ 56.8 ’’ W), Espírito Santo Basin, ES, Brazil, 750 m. Geographic distribution. Brazil, off ES, Espírito Santo Basin, (19 ° 54 ’ 36.98 ” S 39 ° 36 ’ 54.8 ” W – 19 ° 54 ’ 41.8 ’’ S 39 ° 36 ’ 75.62 ’’ W); Campos Basin, off RJ, (22 ° 03 ’ 69.4 ” S 39 ° 52 ’ 40.2 ” W – 22 ° 20 ’ 67.1 ” S 40 ° 00 ’ 58.5 ” W) (Santos-Silva and Souza-Filho, 2017 a). Habitat. Benthic, upper slope between 750 – 1,050 m depth (Santos-Silva and Souza-Filho, 2017 a). Current systematic position. Ischnomesus wilsoni Santos-Silva and Souza-Filho, 2017 a. Remarks. This species was named in honor of Dr. George (Buz) Wilson (Saugatuck Natural History Laboratory), a great friend and world-recognized isopod specialist who came to Brazil in 2006 to study the project OCEANPROF Asellota collection. At the time, Dr. Wilson analyzed the material and indicated the presence of several putative new species.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0E8C39FF41F9A9931B376A.taxon	description	(Fig. 4 B)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0E8C39FF41F9A9931B376A.taxon	materials_examined	Type material. Holotype: male, 2.6 mm, IOUSP. Paratypes, 8 males, 8 females, IOUSP; 3 males and 3 females deposited in the Zoological Museum, University of Copenhagen, Denmark. Topotype material: 23 specimens, Lamberto Beach (23 ° 29 ’ 45.8 ” S 45 ° 06 ’ 41.5 ” W), Ubatuba, SP, Brazil, AM Pires col. January, 1972, MNRJ 6276. Type locality. Lamberto Beach (23 ° 29 ’ 45.8 ” S 45 ° 06 ’ 41.5 ” W), Ubatuba, SP, Brazil. Shallow sublittoral, 0.5 – 1 m depth, in large growth of the algae Sargassum cymosum C. Agardh alongside the pier of the North Base, Instituto Oceanográfico, USP. Geographic distribution. Caribbean Sea (Colombia); Brazil (PE, SP) (Moreira and Pires, 1977; Pires-Vanin, 1998; Craveiro and Alves, 2021). Habitat. Found in shallow water on sandy bottoms, among algae, and on the sea star Echinaster brasiliensis Müller and Troschel, 1842 (Pires, 1995; Pires-Vanin, 1998). Current systematic position. Janaira gracilis Moreira and Pires, 1977. Remarks. The material of J. gracilis deposited at Museu Nacional as voucher number MNRJ 6276 is actually a topotype. It came from the same collection event as the holotype in Lamberto Beach, Ubatuba, SP, collected by Pires in January 1972. At some point in the past, Pires sent this material to be deposited at the MNRJ as a paratype; unfortunately, she did not include this information within the article (Moreira and Pires, 1977), so this material remains a topotype.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0D8C38FC09FDE7922C30EE.taxon	description	(Fig. 5)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0D8C38FC09FDE7922C30EE.taxon	materials_examined	Type material. Holotype: male, 7.2 mm, MZUSP. Paratypes: 4 specimens, MZUSP; 4 specimens, SMNH; 4 specimens, USNM. Topotype material: 1 specimen, Enseada do Flamengo, Ubatuba, SP, collected by AM Pires, September 1975, MNRJ 6278. Type locality. Enseada do Flamengo, Ubatuba, SP, Brazil. Geographic distribution. Brazil: Ubatuba, Santos, Itanhaém (SP), Arraial do Cabo (RJ) (Pires, 1981) and Macaé (RJ) (Serejo et al., 2022). Habitat. Intertidal and shallow sublittoral. Found among macroalgae (Pires, 1981; Pires-Vanin, 1998; Serejo et al., 2022). Current systematic position. Paranthura urochroma Pires, 1981. Remarks. The material of Paranthura urochroma deposited at Museu Nacional as voucher number MNRJ 6278 is actually a topotype. It came from the same collection event as the holotype at Enseada do Flamengo, Ubatuba, SP collected by Pires in September 1975. At some point in the past, Pires sent this material to be deposited at the MNRJ as a paratype; unfortunately she did not include this information within the article (Pires, 1981), so this material remains a topotype.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0C8C38FEABF92D93F636E9.taxon	description	(Fig. 6)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0C8C38FEABF92D93F636E9.taxon	materials_examined	Type material. Holotype: female, 18 mm, MNRJ 6282. Allotype: male, MNRJ 6283. Paratypes: 1 female, 2 juvenile, MNRJ 6284. Type locality. GEDIP Expedition, Est. 1758, RS, Brazil. Geographic distribution. Brazil (RS) (Brasi 1 - Lima, 1986; 1998). Habitat. According to Bruce (2009), Rocinela species should be considered micro-predators rather than parasites. Parasites are widely regarded as having some manner of perceived deleterious or harmful effect on the host. Aegids do not fulfill these criteria, and while attacking and feeding on their prey they rarely form a permanent association with their ‘ host’, but instead detach following their feed. Current systematic position. Rocinela patriciae BrasilLima, 1986 Remarks. Holotype (MNRJ 6282), in poor condition.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0C8C38FC0BFE80940E3087.taxon	description	(Fig. 7)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0C8C38FC0BFE80940E3087.taxon	materials_examined	Type material. Holotype: female, 9 mm, MNRJ 6280. Paratype: 1 female, MNRJ 6281. Type locality. GEOMAR X Expedition, Vitória (18 ° 38 ’ S 39 ° 34 ’ W), ES, Brazil. Geographic distribution. Brazil (BA, ES) (BrasilLima, 1986; 1998).	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0C8C3FFC7DFA22958B338A.taxon	description	(Fig. 8)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0C8C3FFC7DFA22958B338A.taxon	materials_examined	Type locality. North coast of RS, Brazil, 280 m. Geographic distribution. Brazil (PI, CE, RN, BA, ES, RJ, RS) (Lemos de Castro, 1978; Pires-Vanin, 1998; Magalhães and Young, 2003). Habitat. Found between 22 – 800 m depth (Lemos de Castro, 1978; Pires-Vanin, 1998; Magalhães and Young, 2003). Current systematic position. Bathynomus miyarei Lemos de Castro, 1978. Remarks. Species was originally described based on material from RS (type locality), Acaraú, CE (80 m) and RN (22 m). The northeastern samples (from CE and RN) were collected from shallow water using lobster traps (Lemos de Castro, 1978). Magalhães and Young (2003) examined material from the REVIZEE Central project and extended the distribution of B. miyarei to the southeastern Brazilian coast, with a depth range from the outer continental shelf to the slope (230 – 800 m).	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0A8C3EFF14F9AF949733C4.taxon	description	(Fig. 9)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D0A8C3EFF14F9AF949733C4.taxon	materials_examined	Type material. Holotype: male, 10 cm, MNRJ 15810. Paratypes: 1 male, MNRJ 15534; 1 male, MNRJ 15535; 1 manca, MNRJ 15536; 64 females, 73 males, 169 juveniles, MNRJ 16088; 2 females, 1 juvenile, MNRJ 16342. Typelocality. REVIZEE Central / Pesca Covos, # IV, ES, off Anchieta (20 ° 57.5 ’ S 40 ° 07 ’ 8 W). Geographicdistribution. Brazil: (BA, ES) (Magalhães and Young, 2003). Habitat. Found between 232 – 840 m depth (Magalhães and Young, 2003). Current systematic position. Bathynomus obtusus Magalhães and Young, 2003.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D098C3CFE90F9CD926B3291.taxon	materials_examined	Type material. Holotype, female, 5.1 mm, MOUFPE 14956. 1 male, 6 mm, MNRJ 6439 (previously identified as C. palifrons by Lemos de Castro and Lima, 1976 a). 7 males, 8 females and 5 manca, MNRJ 17456 and (previously identified as Cirolana parva by Koening, 1972). 1 male and 1 female, MNRJ 3714 (previously identified as Cirolana parva). Type locality. BPOT IV 37, dredge, 4 ° 57 ” 48 ” S – 36 ° 44 ’ 15 ” W, off Potiguar Basin, Rio Grande do Norte. Geographic distribution. Brazil (RN, Potiguar Basin, PB, PE, AL, SE, BA, ES) (Paiva and Souza-Filho, 2014; 2015). Habitat. Found between 10 to 60 m depth (Paiva and Souza-Filho, 2014). Current systematic position. Cirolana lemoscastroi Paiva and Souza-Filho, 2014 Remarks. Paiva and Souza-Filho (2014) reexamined material from Museu Nacional / UFRJ (MNRJ 6439) identified previously by Lemos de Castro and Brasil-Lima (1976 a) as C. palifrons Barnard, 1920 and material identified as C. parva Hansen, 1890 (MNRJ 3714 and MNRJ 17456) and concluded that they are the Brazil endemic C. lemoscastroi.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D088C23FEA7FB5E9106316E.taxon	description	(Fig. 10 A)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D088C23FEA7FB5E9106316E.taxon	materials_examined	Type material. Holotype: male, 2.8 mm, MNRJ 6272. Type locality. South of BA to North of ES, Brazil (18 ° 09 ’ S 39 ° 15 ’ W to 20 ° 27 ’ S 40 ° 11 ’ W). Geographic distribution. Brazil (BA, ES) (Lemos de Castro and Brasil-Lima, 1976 a; Pires-Vanin, 1998). Current systematic position. Metacirolana riobaldoi (Lemos de Castro and Brasil-Lima, 1976 a). Remarks. Description based solely on the holotype (MNRJ 6272), which is in very poor condition.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D178C23FE82F9D1949B3123.taxon	materials_examined	Type material. Male, 15 mm, (dissected and drawn, 8 slides), MNRJ 20208. Type locality. REVIZEE Sul, station # 6743, Box Corer, 23 ° 55 ’ 40 ” S, 42 ° 47 ’ 60 ” W, 508 m, 15 February 1998. Geographic distribution. Brazil (BA, RJ, SP) (Paiva and Souza-Filho, 2023). Habitat. Found between 250 – 508 m depth (Paiva and Souza-Filho, 2023). Current systematic position. Dolicholana ivanyae Paiva and Souza-Filho, 2023	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D178C22FCC4FA4092B4360C.taxon	description	(Fig. 10 B)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D178C22FCC4FA4092B4360C.taxon	materials_examined	Type material. Holotype: male, 6.4 mm, MNRJ 6230. Typelocality. Abrolhos Archipelago, BA, Brazil, on fish Cephalopholis sp. Geographic distribution. Brazil (BA) (Lemos de Castro, 1960; Pires-Vanin, 1998). Habitat. Benthic, found on fish Cephalopholis sp. (Lemos de Castro, 1960). Current systematic position. Excorallana angusta Lemos de Castro, 1960. Remarks. Description based solely on the holotype. The voucher number included in the original description (622) is not valid anymore.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D168C21FF52FE2692A53496.taxon	description	(Fig. 11)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D168C21FF52FE2692A53496.taxon	materials_examined	Type material. Holotype: male, 3.8 mm, MNRJ 6236. Allotype: female, 5 mm, MNRJ 6237. Paratypes: 3 males, 3 females, MNRJ 6238. Type locality. AP, Brazil (02 ° 57 ’ N 49 ° 04 ’ W). Geographic distribution. Brazil (AP, PA, CE, PB, PE) (Lemos de Castro and Brasil-Lima, 1971; Pires-Vanin, 1998; Santos-Silva and Souza-Filho, 2017 b). Habitat. Between 25 – 103 m depth (Santos-Silva and Souza-Filho, 2017 b). Current systematic position. Excorallana bicornis Lemos de Castro and Brasil-Lima, 1971.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D158C21FF74FD5F95B8363F.taxon	description	(Fig. 12)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D158C21FF74FD5F95B8363F.taxon	materials_examined	Type material. Holotype: male, 15 mm, MNRJ 6233. Allotype: female, 11 mm, MNRJ 6234. Paratype: 1 male, MNRJ 6235. Type locality. Manguinhos Beach, Cabo Frio, RJ, Brazil. Geographic distribution. Brazil (AP, PA, MA, CE, RN, PE, ES, RJ, SP) (Lemos de Castro, 1960; Pires-Vanin, 1998; Santos-Silva and Souza-Filho, 2017 b). Habitat. Between 0.5 – 140 m depth (Santos-Silva and Souza-Filho, 2017 b). Current systematic position. Excorallana costata Lemos de Casto, 1960. Remarks. Voucher numbers in the original description (1415 – 1417) are not valid anymore.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D158C20FCF9FEF595B93237.taxon	description	(Fig. 13)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D158C20FCF9FEF595B93237.taxon	materials_examined	Type locality. Among submerged tree trunks in the mouth of Rio do Saco, Mangaratiba Bay, RJ, Brazil. Geographic distribution. Brazil (AP, RJ) (Lemos de Castro, 1960; Pires-Vanin, 1998; Esteves-Silva et al., 2020). Habitat. Parasite of several fish species, infesting tegument, mouth and fins (Esteves-Silva et al., 2020). Current systematic position. Excorallana longicornis Lemos de Castro, 1960. Remarks. Voucher numbers in the original description (1410 – 1412) are not valid anymore.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D148C27FCFAFAFE94E831E6.taxon	description	(Fig. 14)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D148C27FCFAFAFE94E831E6.taxon	materials_examined	Type material. Holotype: female, 5.5 mm, MNRJ 6231. Paratypes: 1 female, MNRJ 6232. Type locality. Armação de Búzios, Cabo Frio, RJ, Brazil. Geographic distribution. Brazil (AP, PA, MA, CE, RN, PE, AL, ES, RJ) (Pires-Vanin, 1998; Santos-Silva and Souza-Filho, 2017 b). Habitat. Marine, shallow water between 0.65 – 94 m depth. Current systematic position. Excorallana richardsoni Lemos de Castro, 1960. Remarks. Paratype (MNRJ 6232) vials were empty. Voucher numbers in the original description (1413 and 1414) are not valid anymore.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D138C26FCC1F98F92A23212.taxon	description	(Fig. 15)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D138C26FCC1F98F92A23212.taxon	materials_examined	Type material. Holotype: male, 4.5 mm, MNRJ 6239. Allotype: female, 3 mm, MNRJ 6240. Paratypes: 1 female, MNRJ 6241; 1 female MNRJ 6242. Type locality. Iracema Beach, Fortaleza, CE, Brazil. Geographic distribution. Brazil (PA, CE) (Lemos de Castro and Brasil-Lima, 1976 b; Pires-Vanin, 1998). Current systematic position. Excorallana stebbingi Lemos de Castro and Brasil-Lima, 1976.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D128C26FEEFFB5093B133FE.taxon	description	(Fig. 16 A)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D128C26FEEFFB5093B133FE.taxon	materials_examined	Type material. Holotype: male, 2.5 mm, MZUSP 11517. Paratypes: 5 females, MZUSP 11518; 3 males, MNRJ 3234; 3 males, 7 females, MNRJ 3235. Type locality. Ubatuba continental slope, Sta. 5120 (24 ° 19 ’ 6 ’’ S 44 ° 40 ’ 46 ’’ W), 134 m depth, SP, Brazil. Geographic distribution. Brazil (SP) (Pires, 1996; Pires-Vanin, 1998). Habitat. Among dead corals and calcareous algae, restricted to the shelf break, between 134 and 180 m depth (Pires, 1996; Pires-Vanin, 1998). Current systematic position. Gnathia andrei Pires, 1996.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D118C25FE96FCC490C537F9.taxon	description	(Fig. 16 B)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D118C25FE96FCC490C537F9.taxon	materials_examined	Type material. Holotype: male, 5.5 mm, MZUSP 11513. Paratypes: 4 males, MNRJ 3232; 2 males, 2 females, MNRJ 3233; 1 male, MZUSP 11516. Typelocality. Ubatuba continental slope, Sta. 5365 (24 ° 25 ’ S 44 ° 16.5 ’’ W), 320 m depth, SP, Brazil. Geographic distribution. Brazil (SP) (Pires, 1996; Pires-Vanin, 1998). Habitat. Muddy and sand bottoms of upper and central slope, between 134 – 530 m depth, with increased abundance at 320 m (Pires, 1996; Pires-Vanin, 1998). Current systematic position. Gnathia ricardoi Pires, 1996.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D118C24FC64FCC491AB3491.taxon	description	(Fig. 16 C)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D118C24FC64FCC491AB3491.taxon	materials_examined	Type material. Holotype: male, 3.8 mm, MZUSP 11510. Paratypes: 18 specimens, MZUSP 11511; 16 specimens, MNRJ 3230; 3 specimens, MNRJ 3231. Typelocality. Ubatuba continental shelf, Sta. 4856 (24 ° 13 ’ S 44 ° 45 ’ W), 110 m depth, SP, Brazil. Geographic distribution. Brazil (SP) (Pires, 1996; Pires-Vanin, 1998). Habitat. Hard and sandy bottoms on continental shelf and upper slope, between 20 – 320 m depth (Pires, 1996; Pires-Vanin, 1998). Current systematic position. Gnathia ubatuba Pires, 1996. Remarks. Additional material can be found in the IOUSP collection.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D108C24FF65FD90946537D2.taxon	description	(Fig. 17 A)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D108C24FF65FD90946537D2.taxon	materials_examined	Type material. Holotype: male, 0.83 mm, MNRJ 6247. Paratypes: 1 male, 2 females; 1 male, 2 females, USU. Type locality. Barra da Tijuca Beach, coarse sand, 100 cm depth, RJ, Brazil. Geographic distribution. Brazil: Vermelha, Barra da Tijuca, Recreio dos Bandeirantes and Imbuí Beaches (RJ) (Albuquerque, 1978; Albuquerque and Genofre, 1999). Habitat. Interstitial, littoral in intertidal zone, on beaches with medium to coarse size sand (Albuquerque, 1998). Current systematic position. Robustura brasiliensis (Albuquerque, 1978). Remarks. Wägele et al. (1995) listed Robustura Gnanamuthu, 1954 as a junior subjective synonym of Coxicerberus Wägele, Voelz and McArthur, 1995 but that is incorrect, and the former is the senior subjective synonym following Article 23 of the principle of priority (ICZN, 1999). So, species previously included in Coxicerberus are now in Robustura (Boyko et al., 2023). Paratypes deposited at the Department of Animal Biology of Santa Úrsula University (USU) lack voucher numbers.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D108C2BFCD8FF9A92E5301F.taxon	description	(Fig. 17 B)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D108C2BFCD8FF9A92E5301F.taxon	materials_examined	Type material. Holotype: male, 0.9 mm, MNRJ 6244. Paratypes: 5 males, 5 females; 1 male, USU. Typelocality. Macumba Beach, coarse sand, 50 cm depth, RJ, Brazil. Geographic distribution. Brazil: Vermelha, Barra da Tijuca, Recreio dos Bandeirantes and Macumba beaches (RJ) (Albuquerque, 1978; Albuquerque and Genofre, 1999). Habitat. Interstitial, littoral in intertidal zone, on beaches with medium to coarse size sand (Albuquerque, 1998). Current systematic position. Robustura magnus (Albuquerque, 1978). Remarks. See Remarks of Microcerberus brasiliensis for current generic status. Paratypes are deposited in the Department of Animal Biology of Santa Ursula University (USU), without voucher numbers.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1F8C2BFF74F8D794B435F4.taxon	materials_examined	Type material. Holotype: male, 0.7 mm, MNRJ 6246 (lost). Paratypes: 1 male, 3 females; 1 male, 2 females, USU. Type locality. Piratininga Beach, coarse sand, 70 cm depth, Niterói, RJ, Brazil. Geographic distribution. Brazil: Vermelha, São Conrado, Barra da Tijuca, Prainha, Praia de Fora, Piratininga, Itaipú beaches (RJ) (Albuquerque, 1978; Albuquerque and Genofre, 1999). Habitat. Interstitial, littoral in intertidal zone, on beaches with medium to coarse size sand (Albuquerque, 1998). Current systematic position. Robustura parvul a (Albuquerque, 1978). Remarks. See Remarks of Microcerberus brasiliensis for current generic position. Holotype (MNRJ 6246) lost. Paratypes are deposited in the Department of Animal Biology of Santa Ursula University (USU), without voucher numbers.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1F8C2BFCDDFDBE95503254.taxon	description	(Fig. 17 C)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1F8C2BFCDDFDBE95503254.taxon	materials_examined	Type material. Holotype: male, 0.8 mm, MNRJ 6245. Paratypes: 5 males, 5 females; 1 male, USU. Type locality. Vermelha Beach, in coarse sand, 40 cm depth, RJ, Brazil. Geographic distribution. Brazil: Vermelha, Barra da Tijuca, and Recreio dos Bandeirantes beaches (RJ) (Albuquerque, 1998). Habitat. Interstitial, littoral in intertidal zone, on beaches with medium to coarse size sand (Albuquerque, 1998). Most abundant species at Vermelha Beach (Albuquerque and Genofre, 1999). Current systematic position. Robustura ramosae (Albuquerque, 1998). Remarks. See Remarks of Microcerberus brasiliensis for current generic position. Paratypes are deposited in the Department of Animal Biology of Santa Ursula University (USU), without voucher numbers.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1E8C29FF6AFCC494573497.taxon	description	(Fig. 18)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1E8C29FF6AFCC494573497.taxon	materials_examined	Type material. Holotype: female, 5.5 mm, MNRJ 6100. Allotype: male, 3 mm, MNRJ 6101. Type locality. Mucuripe Beach (3 ° 43 ’ 18 ’’ S 38 ° 28 ’ W), Fortaleza, CE, Brazil. Found as parasite of Clibanarius sp. Geographic distribution. Venezuela. Gulf of Mexico (Ribeiro et al., 2019 a; Romero-Rodriguez and Álvarez, 2023). Brazil (CE, AL) (Lemos de Castro, 1965; Brasil-Lima, 1998). Habitat. Abdominal parasite of Clibanarius antillensis Stimpson, 1859, Calcinus tibicen Herbst, 1791, and Paguristes tortugae Schmitt, 1933 (Lemos de Castro, 1965; Ribeiro et al. 2019 a; Romero-Rodriguez and Álvarez, 2023). Current systematic position. Pseudostegias atlantica Lemos de Castro, 1965.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1D8C28FC2BFD8492A53758.taxon	description	(Fig. 19)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1D8C28FC2BFD8492A53758.taxon	materials_examined	Type material. Holotype: female, MNRJ 6087. Allotype: male, MNRJ 6088. Paratypes: MNRJ 6089; MNRJ 6474. Type locality. Atafona (21 ° 37 ’ 19.4 ” S 41 ° 00 ’ 43.7 ” W), RJ, Brazil. Geographic distribution. Brazil (RJ) (Lemos de Castro and Brasil-Lima, 1974; Brasil-Lima, 1998). Habitat. Parasite of Palaemon pandaliformis (Stimpson, 1871) and P. paludosus (Gibbes, 1850) (Lemos de Castro and Brasil-Lima, 1974; Brasil-Lima, 1998). Current systematic position. Probopyrus palaemoni Lemos de Castro and Brasil-Lima, 1974.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1C8C2FFCD7FD6A94163497.taxon	description	(Fig. 20)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1C8C2FFCD7FD6A94163497.taxon	materials_examined	Type material. Holotype: female, 5 mm, MNRJ 6095. Allotype; male, 4 mm, MNRJ 6096. Paratypes: 2 males, 2 females, MNRJ 6097. Type locality. AP, Brazil. Geographic distribution. Brazil (AP, PA) (BrasilLima, 1980; Brasil-Lima, 1998). Habitat. Holotype and allotype are parasites in the branchial chamber of Marcusiaxius lemoscastroi Rodrigues and de Carvalho, 1972 from Amapá. Other paratypes are parasites in the branchial chamber of Meticonaxius sp. from Pará (Brasil-Lima, 1980). Current systematic position. Castrione longicaudata Brasil-Lima, 1980.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1B8C2EFC38FD25947E3671.taxon	description	(Fig. 21)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1B8C2EFC38FD25947E3671.taxon	materials_examined	Type material. Holotype, female, 4 mm, MNRJ 6093. Allotype, male, MNRJ 6094. Type locality. Ribeira Beach, Mangaratiba, RJ, Brazil. Geographic distribution. Brazil (RJ) (Brasil-Lima, 1998). Habitat. Parasite of Upogebia brasiliensis Holthuis (Lemos de Castro and Brasil-Lima, 1980). Current systematic position. Hemicepon muelleri Lemos de Castro and Brasil-Lima, 1980. Remarks. This species was named in honor of Fritz Müller, a German researcher who lived in Santa Catarina, Brazil, and worked from 1876 to 1891 as a traveling naturalist for the Museu Nacional / UFRJ. He wrote nearly 260 scientific articles, including some on Brazilian species of Crustacea, and was a strong defender of the natural selection ideas of Charles Darwin (Souza and Kamensky, 2016). The original spelling of the epithet name mülleri was changed to muelleri due to an improper use of diacritical mark (Boyko et al., 2023).	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1A8C2DFC39FEB692FE3733.taxon	description	(Fig. 22)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D1A8C2DFC39FEB692FE3733.taxon	materials_examined	Type material. Holotype: female, 5 mm, MNRJ 6090. Allotype: male, 1.5 mm, MNRJ 6091. Paratype: 1 female, MNRJ 6092. Typelocality. Cabo Branco, João Pessoa, PB, Brazil. Geographic distribution. Brazil (PE, PB) (Lemos de Castro and Brasil-Lima, 1975 b; Brasil-Lima, 1998). Habitat. Parasite of Upogebia omissa Gomes Corrêa (Lemos de Castro and Brasil-Lima, 1975 b). Current systematic position. Upogebione tropica (Lemos de Castro and Brasil-Lima, 1975 b).	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D198C2DFF11FFB4923A333E.taxon	description	(Fig. 23)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D198C2DFF11FFB4923A333E.taxon	materials_examined	Type material. Holotype: female, 4 mm, MNRJ 6098. Allotype: male, 0.85 mm, MNRJ 6099. Type locality. SP (23 ° 44 ’ 5 S 43 ° W), 133 m depth, Brazil. Geographic distribution. Brazil (SP) (Lemos de Castro and Brasil-Lima, 1975 b; Brasil-Lima, 1998). Habitat. Parasite of Munida sp. (Lemos de Castro and Brasil-Lima, 1975 a; Brasil-Lima, 1998). Current systematic position. Pleurocrypta meridionalis Lemos de Castro and Brasil-Lima, 1975 b. Remarks. Holotype specimen (MNRJ 6098) is in a poor state of preservation.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D198C2DFC05FC8794D0320C.taxon	materials_examined	Type material. Holotype: female, 7.2 mm, MNRJ 28676. Allotype: male, 4.6 mm, MNRJ 28678. Paratypes: 2 males, 1 female, 1 cryptoniscus larvae MNRJ 28679; 2 males, 3 females, 1 cryptoniscus larvae, MNRJ 28680; 1 male, 1 female, MNRJ 28681; 1 male, 1 female, MNRJ 28682; 2 females, 1 cryptoniscus larvae, MNRJ 28683; 2 males, 3 females, 2 cryptoniscus larvae, MNRJ 28684; 2 males, 2 females, 2 cryptoniscus larvae, MNRJ 28685; 1 male, 1 female, MNRJ 28686; 1 male, 1 female, MNRJ 28687; 1 male, 1 female, MNRJ 28688. Type locality. Oceanprof II, Sta. # 4 - 2, Campos Basin (22 ° 24.419 ’ S 39 ° 55.556 ’ W), 1,127 m depth, Brazil. Geographic distribution. Campos Basin, Brazil (Brito et al., 2018). Habitat. Parasite in the right branchial chamber of Munida microphthalma A. Milne-Edwards (Brito et al., 2018). Current systematic position. Pseudione serejoae Brito, Cardoso and Boyko, 2018. Remarks. Unfortunately, all the type material of P. serejoae (MNRJ 28676 – 28688) was lost due to the 2018 fire that destroyed the inner spaces of the São Cristovão Palace, including the Carcinology Laboratory (Zamudio et al., 2018).	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D198C2CFCDEFB7D94573375.taxon	description	(Fig. 24 A)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D198C2CFCDEFB7D94573375.taxon	materials_examined	Type material. Holotype: female, 4.8 mm, MNRJ 6248. Allotype: male, 1.5 mm, MNRJ 6249. Paratype, female, MNRJ 6250. Type locality. Atafona, RJ, Brazil (21 ° 37 ’ 19.4 ” S 41 ° 00 ’ 43.7 ” W). Geographic distribution. Brazil (RJ) (Brasil-Lima, 1998). Habitat. Hyperparasite on Probopyrus sp. (Lemos de Castro, 1970). Current systematic position. Cabirops lobiformis Lemos de Castro, 1970.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D278C13FF71F84E91EA33FF.taxon	description	(Fig. 24 B, C)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D278C13FF71F84E91EA33FF.taxon	materials_examined	Type material. Holotype: female, 4.5 mm, MNRJ 6102. Allotype: male, 1.8 mm, MNRJ 6103. Paratypes: 19 males, 3 females, MNRJ 6104. Type locality. Barra do Ceará, Fortaleza, CE, Brazil. Geographic distribution. Brazil (CE) (Lemos de Castro, 1970; Brasil-Lima, 1998) Habitat. Hyperparasite of Progebiophilus upogebiae (Hay, 1917), which is parasitic in the branchial chamber of Upogebia omissa Gomes-Corrêa, 1968 (Lemos de Castro, 1970). Current systematic position. Cabirops pseudioni Lemos de Castro, 1970.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D278C11FCDFF93292883021.taxon	description	(Fig. 25)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D278C11FCDFF93292883021.taxon	materials_examined	Type material. Holotype: male, 6.79 mm, MNRJ 6225. Allotype: female, 5.77 mm, MNRJ 6226. Type locality. Ribeira Beach, Mangaratiba Bay, RJ, Brazil. Geographic distribution. Western Atlantic: Gulf of Mexico (Tampico), Panama (María Chiquita, Shimmey, Ft. San Lorenzo), Costa Rica (Puerto Viejo and Cahuita) and Brazil (PB, RJ, SP) (Lemos de Castro, 1959; Glynn and Glynn, 1974; Dexter, 1976; Loyola and Silva, 1998). Habitat. Sandy bottom, 1.5 m depth (Lemos de Castro, 1959). Current systematic position. Ancinus brasiliensis Lemos de Castro, 1959. Remarks. The species A. granulatus and A. brasiliensis were considered junior synonyms of Ancinus depressus by Loyola and Silva (1971). Later, Glynn and Glynn (1974) revised the genus Ancinus and considered the three species as valid. Ancinus brasiliensis is currently a valid species and accepted in the World Marine, Freshwater and Terrestrial Isopod Crustaceans database (Boyko et al., 2023).	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D258C11FF73F92F941530B4.taxon	description	(Fig. 26)	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
F27D87B72D258C11FF73F92F941530B4.taxon	materials_examined	Type material. Holotype: male, MZUSP 12174. Paratypes: 1 male, 1 female, MZUSP 12175; 1 male, 1 female, MNRJ 8572; 1 male, 1 female, IOUSP 232. Type locality. Antarctica, northeast of Joinville Island, St. 4381 (62 ° 48 ’ S 54 ° 20 ’ W), 280 m depth. Geographicdistribution. BransfieldStrait: northeastof Elephant, and Joinville Islands, and southwest of Smith Island, Antarctic Ocean (Pires and Sumida, 1997). Habitat. Found between 168 – 362 m depth in water temperature from - 2.07 to 1.28 ° C (Pires and Sumida, 1997). Current systematic position. Dolichiscus ferrazi Pires and Sumida, 1997.	en	Fernandes, Cristiana S. Serejo Agatha C. S. (2025): Illustrated type catalogue of marine Isopoda (Crustacea: Peracarida) from the Museu Nacional / UFRJ, Brazil. Nauplius (e 20250535) 33: 1-39, DOI: 10.1590/2358-2936e20250535, URL: https://doi.org/10.1590/2358-2936e20250535
