Xangoniscus aganju, Campos-Filho & Araujo & Bichuette & Trajano & Taiti, 2014

Campos-Filho, Ivanklin Soares, Araujo, Paula Beatriz, Bichuette, Maria Elina, Trajano, Eleonora & Taiti, Stefano, 2014, Terrestrial isopods (Crustacea: Isopoda: Oniscidea) from Brazilian caves, Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 172 (2), pp. 360-425 : 373-379

publication ID	https://doi.org/ 10.1111/zoj.12172
publication LSID	lsid:zoobank.org:pub:246C2229-308B-4A9B-A150-CE1D27D2EBD8
persistent identifier	https://treatment.plazi.org/id/CF6FE30C-FFAC-FF9A-03B3-CEC3FEF54898
treatment provided by	Marcus
scientific name	Xangoniscus aganju
status	sp. nov.

Treatment

XANGONISCUS AGANJU View in CoL CAMPOS- FILHO, ARAUJO & TAITI SP. NOV.

FIGURES 9–13 View Figure 9 View Figure 10 View Figure 11 View Figure 12 View Figure 13 , 40 View Figure 40

Type material

Holotype: ♂, Brazil, Bahia, Cariranha, Gruna do Mandiaçu , 13°50′S, 44°14′W, 11 September 2008, leg. M.E. Bichuette ( MZUSP 27523 View Materials ). GoogleMaps

Paratypes: Two ♂, one ♀, same data as holotype ( MZUSP 27524 View Materials ) GoogleMaps .

Etymology

The new species is named after Aganju, an Afro- Brazilian divinity representative of the subterranean environment.

Description

Maximum length: ♂, 6 mm; ♀, 7 mm. Colourless body, pereon with almost parallel sides ( Fig. 9A View Figure 9 ). Dorsal surface smooth with pointed scale setae, which are fringed on the posterior margins of the pereonites and pleonites ( Fig. 9B,C View Figure 9 ). Eyes absent. Cephalon ( Fig. 9D,E View Figure 9 ) with large quadrangular antennary lobes; profrons with a small carena and V-shaped suprantennal line; vertex with rounded frontal groove and slightly depressed at sides. Posterior corners of pereonite 1 right-angled, of pereonites 2–7 progressively more acute. Pleonites 3–5 ( Fig. 9F View Figure 9 ) with falciform epimera. Telson ( Fig. 9F,G View Figure 9 ) with slightly concave sides and broadly rounded apex. Antennule ( Fig. 9H View Figure 9 ) of three articles similar in length, and bearing two long apical aesthetascs. Antenna ( Fig. 9I View Figure 9 ) with fifth article of peduncle longer than flagellum; flagellum of three distinct articles, first and second articles subequal in length, third article much shorter. Mandibles with two penicils in the left ( Fig. 10A View Figure 10 ) and one penicil in the right ( Fig. 10B View Figure 10 ); lacinia mobilis leaf-shaped. Outer branch of maxillule with 5 + 5 teeth, apically entire, and two thick plumose stalks ( Fig. 10C View Figure 10 ); inner branch with proximal penicil longer than the two apical ones. Maxilla with setose and bilobate apex, inner lobe smaller ( Fig. 10D View Figure 10 ). Maxilliped basis enlarged on distal portion, outer, inner, and distal margins bearing a fringe of thin and long setae; endite with a very large rounded apical penicil ( Fig. 10E View Figure 10 ). Uropod ( Fig. 11A View Figure 11 ) with exopod distinctly longer than endopod, and inserted at the same level.

Male: Pereopod 1 ( Fig. 11B View Figure 11 ) with fringed scales on sternal and distal margin of merus, on almost whole surface of carpus, and on sternal margin of propodus. Pereopods 2–4 ( Fig. 11C View Figure 11 ) with fringed scales on sternal and distal margin of merus, carpus, and on sternal margin of propodus. Pereopod 5 ( Fig. 11D View Figure 11 ) with fringed scales on sternal and distal margin of merus and carpus; carpus with a depression on distal half of sternal margin and a distal rounded lobe. Pereopod 6 ( Fig. 12A View Figure 12 ) basis, ischium, and merus with rows of scales on distal margin, ischium enlarged with a flattened sternal part, carpus with distal part narrower than basal one, propodus with rounded flat lobe on basal part. Pereopod 7 ( Fig. 12B View Figure 12 ) with no distinct modifications; ischium with straight sternal margin. Genital papilla ( Fig. 13A View Figure 13 ) lanceolate, enlarged on median portion, and apical part narrow and pointed. Pleopod 1 ( Fig. 13B View Figure 13 ) exopod subtriangular, about two-thirds as long as endopod; endopod with narrow basal article and flagelliform distal article; basis with a triangular medial part fringed with fine and long setae. Pleopod 2 ( Fig. 13C View Figure 13 ) exopod trapezoidal, with longer outer part, distal margin bearing three setae; endopod of two articles, thickset, second segment about three times longer than first, distal part wrench-like, with a medial triangular lobe and transverse point. Pleopod 3 exopod ( Fig. 13D View Figure 13 ) very large, trapezoidal, longer than wide, with distal margin bearing several short setae. Pleopods 4 and 5 exopods ( Fig. 13E,F View Figure 13 ) rhomboidal, wider than long, with distal margin rounded and bearing several short setae.