Apseudomorpha Miller, 1940

Segadilha, Juliana Lopes & Serejo, Cristiana Silveira, 2020, First records of Pseudozeuxidae and Metapseudinae (Metapseudidae) (Crustacea, Tanaidacea) in Southwestern Atlantic, with descriptions of two new species, Zoosystematics and Evolution 96 (2), pp. 723-745 : 723

Genus Apseudomorpha Miller, 1940

Apseudomorpha Miller, 1940: 315.

Apseudomorpha - Lang 1970: 603. - Guţu 1972: 303. - Guţu, 1981: 96, 103, 106. - Sieg 1986: 32. - Guţu 1987: 35, 38, 40. - Guţu 1991: 355. - Guţu 1996a: 85, 88. - Guţu 1996b: 138, 145. - Heard 2002: 373. - Heard et al. 2004: 55; 59. - Larsen 2005: 34. - Guţu 2006: 6, 16, 23, 26, 29, 36, 39, 41-44, 47-48, 120, 180-182, 190, 204. - Guţu 2007: 65. - Guţu 2009: 101, 103, 109-111, 117. - Heard et al. 2009: 251. - Stępień and Błażewicz-Paszkowycz 2013: 560. - Heard et al. 2018: 302, 308 - Bird 2019: 68, Tab. 10 - Morales-Núñez et al. 2019: 213-214, 227, 229-230, Tab. 2, Fig. 10 .

Diagnosis.

See Morales-Núñez et al. 2019.

Type species.

Apseudomorpha oahuensis Miller, 1940.

Species included.

Apseudomorpha albida (Shiino, 1951); A. avicularia (Barnard, 1914); A. brasiliensis sp. nov.; A. drummi Morales-Núñez, Heard & Bird, 2019; A. fontainei Guţu, 1987; A. glebosa (Menzies, 1953); A. hirsuta (Stebbing, 1910); A. magdalenensis (Menzies, 1953); A. martinicana Guţu, 2009; A. negoescuae Guţu, 2007; A. oahuensis Miller, 1940; A. ortizi Guţu, 2006; A. timaruvia (Chilton, 1882); A. veleronis (Menzies, 1953); A. vestafricana Guţu, 2006.

Remarks.

Family Metapseudidae is divided into four subfamilies: Chondropodinae Guţu, 2008; Metapseudinae ; Msangiinae Guţu, 2006 and Synapseudinae Guţu, 1972 ( WoRMS 2020a). The genus Apseudomorpha is included within the subfamily Metapseudinae and can be distinguished from similar genera Pseudoapseudomorpha Guţu, 1991 and Plectrocopus Guţu, 2006 mainly by the carapace with an acute and smoother rostrum and the absence of an exopod on the cheliped ( Guţu 2006).

Lang (1949) replaced the species Apseudes timaruvia Chilton, 1882 into the genus Apseudomorpha . According to Guţu (2009), although it resembles the Apseudomorpha species by several features, it was wrongly included in this genus, mentioning differences as follows: (1) antennule with inner and outer flagellum with numberous segments (six and 14, respectively); (2) antenna flagellum with eight segments; (3) pereopod-2 propodus with two rows of spines; (4) cheliped propodus configuration; and (5) pleopods setation. Indeed Guţu’s conclusion was that Apseudes timaruvia belongs to an unknown genus ( Guţu 2009). More recently, Graham Bird examined the specimens of Apseudomorpha timaruvia and also stated that this species probably belongs in another genus as it differs from the other species of Apseudomorpha by (1) only pleonite-3 epimeron with a long apical seta; (2) more numerous antennular articles (six inner, nine outer; not 14 as Guţu indicated); and (3) pereopods 1-3 carpus and propodus with a double row of spines ( Morales-Núñez et al. 2019).

The species Parapseudes hirsutus Stebbing, 1910 was reclassified by Sieg (1983) in the genus Apseudomorpha . However, Guţu (2009) indicated that the characteristics of the pereopods 1-3 (including the large number of the sternal spines on carpus and propodus), the great length of the antennule and the large number of the flagella segments, correspond to the genus Pseudoapseudomorpha . Yet, due to the absence of the cheliped description in Stebbing (1910), more specifically if the exopodite is present or not, Guţu (2009) refrained from classification changes. Thus, both species mentioned are still retained in the genus Apseudomorpha pending its complete re-description (G. J. Bird in prep.).

The genus Apseudomorpha has a worldwide distribution, with 15 species located in tropical and temperate regions of the Pacific, Atlantic and Indian Oceans ( Morales-Núñez et al. 2019 and present study).

Figures

Figure 10. Pseudozeuxo fischeri sp. nov. Paratype, female dissected (MNRJ 29869). A Antennule; B antenna; C labrum; D left mandible; E right mandible; F maxillule; G maxilla; H labium; I maxilliped. Scale bar: 0.1 mm.