Paratrichorhina taitii Bezerra-Pereira & Grangeiro, 2023

Bezerra-Pereira, Carlos Anderson Soares, Grangeiro, Daniela Correia & Lima, Lucas Ramos Costa, 2023, A new genus and two new species of Platyarthridae Verhoeff, 1949 (Crustacea: Isopoda: Oniscidea) from Brazil, Zootaxa 5325 (3), pp. 436-450 : 443-448

publication ID	https://doi.org/ 10.11646/zootaxa.5325.3.8
publication LSID	lsid:zoobank.org:pub:A922DD99-07AC-47CA-A815-34A21936B6CE
DOI	https://doi.org/10.5281/zenodo.8243578
persistent identifier	https://treatment.plazi.org/id/F0698780-FC14-B14B-69FD-FBF440D645AC
treatment provided by	Plazi
scientific name	Paratrichorhina taitii Bezerra-Pereira & Grangeiro
status	sp. nov.

Treatment

Paratrichorhina taitii Bezerra-Pereira & Grangeiro View in CoL n. sp.

( Figs 6–9 View FIGURE 6 View FIGURE 7 View FIGURE 8 View FIGURE 9 )

Material examined. Holotype: Male ( MZUSP 42753 View Materials ), Brazil, Piauí, Picos, Povoado Aroeiras do Matadouro , Chácara dos trabalhadores: decompaction soil, 6°59’58.28”S, 41°28’23.47”W, 13/III/2022, leg. C. Bezerra-Pereira, J. Lopes & M. Viana. GoogleMaps Paratypes: 3 males, 2 females ( GETOPI-UESPI 0119 ) , 1 male, 1 female ( LABISO-UECE 0579 ) , 2 males, 2 females ( MNRJ 30463 View Materials ) , 1 male, 1 female ( MZUSP 42754 View Materials ), same data as holotype GoogleMaps .

Etymology. The new species name honors Dr. Stefano Taiti for his invaluable contribution to the systematics of Oniscidea.

Diagnosis. Color Body with brownish, eyes of three dark ommatidia, second antenna with antennal flagellum with second article about 3 times longer than first, outer endite of first maxilla with 3+5 teeth, they are all pectinated.

Description. Maximum body measures: male 3.1 mm long, 1.8 mm wide; female (not ovigerous) 4 mm long, 2 mm wide. Color brownish pigments. Habitus narrow ( Fig. 6A View FIGURE 6 ). Dorsal surface bearing fan-shaped scale-setae ( Fig. 6B View FIGURE 6 ). Cephalothorax ( Fig. 6A, D View FIGURE 6 ) slightly involved by pereonite 1 epimera, anterior borders not reaching posterior margin of eyes, lateral lobes not well-developed; suprantennal line slightly downwards on middle; eyes of three dark ommatidia, arranged in triangle. Pereonites 1–7 epimera with flagelliform noduli laterales, d/c coordinates with peak on epimera 2 and 5 ( Fig. 6C View FIGURE 6 ). Pleon narrower than pereon, pleonites 1–2 epimera covered by the last pleon segment ( Fig. 6A View FIGURE 6 ). Pleotelson ( Fig. 6A View FIGURE 6 ) triangular with proximal part broader than distal part.

First antenna ( Fig. 6E View FIGURE 6 ), basal article is larger than the others, medial is the smallest, and the distal is about 2.5 times larger than the medial and relatively equal to the basal, distal article with six aesthetascs in the subapical region, all robust.

Second antenna ( Fig. 6F View FIGURE 6 ) short, distal article of peduncle stout bearing; flagellum with article second about three times longer than first; apical organ short.

Mandibles with molar penicil bearing up to four branches; left mandible ( Fig. 7A View FIGURE 7 ) with 2+1 penicils, right mandible ( Fig. 7B View FIGURE 7 ) with 1+1 penicils.

First maxilla inner endite (not drawn) with two hairy penicils; outer endite ( Fig. 7C View FIGURE 7 ) with 3 simple teeth + 5 teeth, they are all pectinated.

Second maxilla ( Fig. 7D View FIGURE 7 ) inner and outer lobes rounded, without discernible separation; inner lobe with five thick setae, outer lobe with one thick setae.

Maxilliped ( Fig. 7E View FIGURE 7 ) basis with some conspicuous setae and sulcus lateralis; palp with two setae on proximal article; endite subrectangular, with a penicil in the median portion.

Pereopods ( Fig. 8A–D View FIGURE 8 ) with strong, slender, simple and ornate setae; dactylus with two claws, outer claw being larger than inner claw, dactylar and ungual setae are simple and not exceeding beyond outer claw ( Fig. 8A–D View FIGURE 8 ).

Uropod ( Fig. 6G View FIGURE 6 ) protopod subrectangular, endopod inserted proximally, exopod twice as long as endopod.

Male. No apparent sexual dimorphism on pereopod VII ( Fig. 8B View FIGURE 8 ) except for differences in size, number and topology of spine-like setae. Pereopod I carpus with longitudinal antennal grooming brush and ornamental setae ( Fig. 8A View FIGURE 8 ). Pleopod I exopod ( Fig. 9A View FIGURE 9 ) triangular two simple setae on outer margin; endopod ( Fig. 9B View FIGURE 9 ) elongated, slightly longer than was exopod, with distal portion bent laterally. Pleopod II exopod ( Fig. 9C View FIGURE 9 ) ovoid without setae; endopod ( Fig. 9D View FIGURE 9 ) elongated, about twice longer than exopod, slightly thin half of the distal portion. Pleopod V exopod ( Fig. 9E View FIGURE 9 ) triangular, outer margin convex with three simple setae.

Ecological aspects. The specimens were collected in an area impacted by human activity and cattle grazing ( Fig. 1A–B, D View FIGURE 1 ). The decompacted soil and lack of moisture may have contributed to the low number of specimens collected at the site. The soil was covered by typical Caatinga vegetation with a large quantity of leaf litter, as well pebbles and fallen wood, sites where the animals were concentrated.

Remarks. Paratrichorhina taitii n. sp. differs from P. piauiensis n. sp. by the following: a) absence of subapical aesthetascs on the first antenna (vs. two subapical aesthetascs); b) absent of feather-like scale-setae in peduncle (vs. present); c) outer endite composed of 3 simple teeth + 5 teeth (all pectinated) (vs. 4+5, inner set with four teeth pectinated); d) molar penicil bearing up to three branches (vs. molar penicil with six branches).