Androdeloscia bicornuata, Grangeiro & Souza & Christoffersen, 2021

Grangeiro, Daniela Correia, Souza, Leila Aparecida & Christoffersen, Martin Lindsey, 2021, Three new species of Androdeloscia Leistikow, 1999 (Oniscidea: Philosciidae) from the Brazilian Amazonia, Zootaxa 5047 (3), pp. 321-341 : 322-323

publication ID	https://doi.org/ 10.11646/zootaxa.5047.3.5
publication LSID	lsid:zoobank.org:pub:F54F51CA-A27C-4EF0-BE54-D68E15D64DA5
DOI	https://doi.org/10.5281/zenodo.5540857
persistent identifier	https://treatment.plazi.org/id/0390879D-F214-FFB4-FF19-F933FC22879C
treatment provided by	Plazi
scientific name	Androdeloscia bicornuata
status	sp. nov.

Treatment

Androdeloscia bicornuata View in CoL sp. nov.

( Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 , 13A View FIGURE 13 )

Material examined. Holotype: Male ( INPA 2535 View Materials ), Brazil, Amazonas, Manaus, Reserva Florestal A. Ducke: solid ground, 2º55’S, 59º59’W, Sep. 8, 1982, J. Adis et al. col GoogleMaps . Paratypes: 2 males, 5 females ( LABISO-UECE 0085 ), same locality as for holotype, Jun. 9, 1983 GoogleMaps ; 2 males, 1 female ( MZUSP 41606 View Materials ), same data as for holotype GoogleMaps ; 1 male ( LABISO-UECE 0086 ), same locality as for holotype, Aug. 9, 1983 GoogleMaps ; 1 male ( INPA 2536 View Materials ), same locality as for holotype, Aug. 9, 1983 GoogleMaps ; 1 male ( INPA 2537 View Materials ), same locality as for holotype, Oct. 13, 1982 GoogleMaps ; 1 male ( INPA 2538 View Materials ), same locality as for holotype, Dec. 18, 1981 GoogleMaps ; 1 male, 2 females, 2 young individuals ( CRUST. UFPB 7403 View Materials ), same locality as for holotype, Mar. 13, 1983 GoogleMaps ; 1 male, 4 females ( INPA 2539 View Materials ), same locality as for holotype, Aug. 9, 1983 GoogleMaps ; 3 males, 1 female ( INPA 2540 View Materials ), same locality as for holotype, Jul. 11, 1983 GoogleMaps .

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 View FIGURE 1 ), 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 View FIGURE 13 ). Cephalothorax not involved by pereonite 1; frontal and lateral lobes slightly developed; linea frontalis absent; linea supraantennalis bent downwards in middle ( Fig. 1A View FIGURE 1 ); 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 View FIGURE 1 ). Pereonite 1 with anterior margin nearly straight; pereonite coxal plates 6–7 with conspicuous tips. Pleon narrower than pereon ( Figs 1B View FIGURE 1 , 13A View FIGURE 13 ). Pleon epimera 3–5 with very small tips ( Figs 1B View FIGURE 1 , 13A View FIGURE 13 ). Pleotelson triangular with rounded apex, lateral margins slightly convex ( Figs 1B View FIGURE 1 , 13A View FIGURE 13 ).

First antenna three-jointed ( Fig. 1C View FIGURE 1 ), distal article with two apical aesthetascs separated by wide gap from group of six subapical aesthetascs.

Second antenna ( Fig. 1D View FIGURE 1 ) 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 View FIGURE 2 ) and one penicil on right mandible ( Fig. 2B View FIGURE 2 ); one penicil between molar and incisive processes; molar process with four-branched penicils on left mandible ( Fig. 2A View FIGURE 2 ), five-branched penicils on right mandible ( Fig. 2B View FIGURE 2 ).

First maxilla inner endite ( Fig. 2D View FIGURE 2 ) with two penicils, small spine-like seta on laterodistal corner; outer endite ( Fig. 2C View FIGURE 2 ) with 4 simple + 4 bifid teeth.

Second maxilla ( Fig. 2E View FIGURE 2 ) 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 View FIGURE 2 ) 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 View FIGURE 4 ) 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 View FIGURE 3 ) 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 View FIGURE 4 ), except for small differences in size, number and topology of spine-like setae. Pleopod I endopod ( Fig. 3B, C View FIGURE 3 ) with complex distal portion, bearing two projected tips ( Fig. 3C View FIGURE 3 ), bent laterally and “hyaline lamellae” lobed and crenulated; there is big lateral lobe distally directed in half length ( Fig. 3B View FIGURE 3 ); exopod ( Fig. 3A View FIGURE 3 ) inner margin straight; rounded portion expanded proximally (expanded latero-distally in female; Fig. 3G View FIGURE 3 ). Pleopod II endopod ( Fig. 3D View FIGURE 3 ) distal half flagelliform; exopod ( Fig. 3E View FIGURE 3 ) subtriangular, longer than wide, two simple setae on outer margin, several pectinate setae on inner and distal portion. Pleopod V exopod ( Fig. 3F View FIGURE 3 ) distally elongated into pronounced tip (not in female; Fig. 3H View FIGURE 3 ); hairy groove along inner margin for fitting endopod of pleopod II and two simple setae (bifurcate in female; Fig. 3H View FIGURE 3 ) 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.