Three new species of Androdeloscia Leistikow, 1999 (Oniscidea: Philosciidae) from the Brazilian Amazonia Author Grangeiro, Daniela Correia Programa de Pós-Graduação em Ciências Biológicas (PPGCB-Zoologia), Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, 58.051 - 900, João Pessoa, Paraíba, Brazil. & Universidade Estadual do Piauí, Campus Professor Barros Araújo, BR- 316, Km 299, Picos, 64600 - 000, Piauí, Brazil. Author Souza, Leila Aparecida Laboratório de Isopoda-LABISO, Universidade Estadual do Ceará-UECE. Author Christoffersen, Martin Lindsey 0000-0001-8108-1938 Programa de Pós-Graduação em Ciências Biológicas (PPGCB-Zoologia), Departamento de Sistemática e Ecologia, Centro de Ciências Exatas e da Natureza, Universidade Federal da Paraíba, 58.051 - 900, João Pessoa, Paraíba, Brazil. & mlchrist @ dse. ufpb. br; https: // orcid. org / 0000 - 0001 - 8108 - 1938 mlchrist@dse.ufpb.br text Zootaxa 2021 2021-09-30 5047 3 321 341 journal article 10.11646/zootaxa.5047.3.5 1175-5326 5540889 F54F51CA-A27C-4EF0-BE54-D68E15D64DA5 Androdeloscia bicornuata sp. nov. ( Figs 1–4 , 13A ) Material examined. Holotype : Male ( INPA 2535 ), Brazil , Amazonas , Manaus , Reserva Florestal A. Ducke : solid ground, 2º55’S , 59º59’W , Sep. 8, 1982 , J. Adis et al . col . Paratypes : 2 males , 5 females ( LABISO-UECE 0085 ), same locality as for holotype, Jun. 9, 1983 ; 2 males , 1 female ( MZUSP 41606 ), same data as for holotype ; 1 male ( LABISO-UECE 0086 ), same locality as for holotype, Aug. 9, 1983 ; 1 male ( INPA 2536 ), same locality as for holotype, Aug. 9, 1983 ; 1 male ( INPA 2537 ), same locality as for holotype, Oct. 13, 1982 ; 1 male ( INPA 2538 ), same locality as for holotype, Dec. 18, 1981 ; 1 male , 2 females , 2 young individuals ( CRUST . UFPB 7403 ), same locality as for holotype, Mar. 13, 1983 ; 1 male , 4 females ( INPA 2539 ), same locality as for holotype, Aug. 9, 1983 ; 3 males , 1 female ( INPA 2540 ), same locality as for holotype, Jul. 11, 1983 . Etymology. The species name is reference to two apical horn-shaped lobes in male pleopod I endopod. Diagnosis. Eyes with eight light brown ommatidia. First antenna distal article with two apical aesthetascs separated by wide gap from group of six subapical aesthetascs. First maxilla outer endite with 4 simple + 4 bifid teeth, lateral margin fringed with setae, concavity absent. Left mandible with 4 penicils and right mandible with 5 penicils on molar process. Male pleopod I endopod distal portion complex, apex with two horn-like tips and hyaline lamellae; exopod with inner margin straight, rounded portion expanded proximally. Male pleopod V exopod with elongate tip. Description. Largest male ( Fig. 1B ), 3 mm in length, 1 mm in width; largest non-ovigerous female, 3.5 mm long, 1 mm wide. Habitus narrow, pigmented light brown ( Fig. 13A ). Cephalothorax not involved by pereonite 1; frontal and lateral lobes slightly developed; linea frontalis absent; linea supraantennalis bent downwards in middle ( Fig. 1A ); eyes with eight light brown ommatidia. Pereon with noduli laterales flagelliforms, peak of coordinates b/c and d/c on coxal plate 4 ( Fig. 1E ). Pereonite 1 with anterior margin nearly straight; pereonite coxal plates 6–7 with conspicuous tips. Pleon narrower than pereon ( Figs 1B , 13A ). Pleon epimera 3–5 with very small tips ( Figs 1B , 13A ). Pleotelson triangular with rounded apex, lateral margins slightly convex ( Figs 1B , 13A ). First antenna three-jointed ( Fig. 1C ), distal article with two apical aesthetascs separated by wide gap from group of six subapical aesthetascs. Second antenna ( Fig. 1D ) with flagellum of three articles, subequal in length, apical organ longer than third article. Mandibles hairy lobe with two conspicuous setae, two penicils on left mandible ( Fig. 2A ) and one penicil on right mandible ( Fig. 2B ); one penicil between molar and incisive processes; molar process with four-branched penicils on left mandible ( Fig. 2A ), five-branched penicils on right mandible ( Fig. 2B ). First maxilla inner endite ( Fig. 2D ) with two penicils, small spine-like seta on laterodistal corner; outer endite ( Fig. 2C ) with 4 simple + 4 bifid teeth. Second maxilla ( Fig. 2E ) inner and outer lobes hairy; inner lobe detached from outer lobe, with eight thick setae; outer lobe with three thick setae close to inner lobe. Maxilliped ( Fig. 2F ) basis with some conspicuous setae and sulcus lateralis; palp with one large seta on proximal article; endite subrectangular, setose, with two setae in distal portion and without penicil. Pereopods with strong and slender spine-like setae; dactylar seta simple; inner claw very short. Pereopod I ( Fig. 4A, C ) merus with one trifid seta; carpus with antennal brush, ornamental sensory spine serrate, and three trifid setae. Pleopod exopod respiratory areas not discernible. Pleopod V exopod ( Fig. 3F, H ) triangular, bearing conspicuous transversal field of setae and hairy groove along medial margin. Uropod endopods smaller than exopods, endopods inserted proximally. Male. No apparent sexual dimorphism on pereopod I and VII ( Fig. 4A–D ), except for small differences in size, number and topology of spine-like setae. Pleopod I endopod ( Fig. 3B, C ) with complex distal portion, bearing two projected tips ( Fig. 3C ), bent laterally and “hyaline lamellae” lobed and crenulated; there is big lateral lobe distally directed in half length ( Fig. 3B ); exopod ( Fig. 3A ) inner margin straight; rounded portion expanded proximally (expanded latero-distally in female; Fig. 3G ). Pleopod II endopod ( Fig. 3D ) distal half flagelliform; exopod ( Fig. 3E ) subtriangular, longer than wide, two simple setae on outer margin, several pectinate setae on inner and distal portion. Pleopod V exopod ( Fig. 3F ) distally elongated into pronounced tip (not in female; Fig. 3H ); hairy groove along inner margin for fitting endopod of pleopod II and two simple setae (bifurcate in female; Fig. 3H ) on outer margin. Remarks. Androdeloscia bicornuata sp. nov. differs from all other species of genus by distinct morphology of complex distal portion of male pleopod I endopod bearing two horn-like tips.