Iansaoniscus georginae Campos-Filho, Araujo & Taiti

Campos-Filho, Ivanklin Soares, Bichuette, Maria Elina, Montesanto, Giuseppe, Araujo, Paula Beatriz & Taiti, Stefano, 2017, The first troglobiotic species of the family Pudeoniscidae (Crustacea, Isopoda, Oniscidea), with descriptions of a new genus and two new species, Subterranean Biology 23, pp. 69-84 : 72

Iansaoniscus georginae Campos-Filho, Araujo & Taiti sp. n. Figs 6, 7, 8

Type locality.

Bahia, Paripiranga, Caverna das Borboletas cave (10°38'12.75"S, 43°51'43.68"W).

Type material.

Holotype male (part in micropreparations) (MZUSP 35114), Bahia, Paripiranga, Borboletas cave, leg. JE Gallão, MP Bolfarini, MJ Rosendo, R Moreira.

Description.

Body length: 5 mm. Body pigmentless, eyes absent. Body outline in lateral view as in Fig. 6A. Dorsum covered with triangular, elongated scale-setae (Fig. 6B). Pereonite 1 epimeron with dorsolateral furrow weakly developed, anterior and posterior corners triangular; pereonite 1 and 2 ventrally with weakly developed lobes (Fig. 6A, E); pereonite 2-7 with subquadrangular epimera. Cephalon as in Fig. 6C, D. Pleonites 3-5 (Fig. 6A, F) with subrectangular epimera directed backwards. Telson (Fig. 6F) almost as wide as long, not surpassing uropod exopods. Antennula (Fig. 6G) with second article bearing thick lateral setae, distal article with 4 lateral aesthetascs plus apical pair. Antenna missing. Mandibles (Fig. 7A, B) with molar penicil with 6-7 branches, left mandible with 2+1 penicils, right with 1+1 penicils. Maxillula (Fig. 7C) inner endite with two penicils, distal margin rounded; outer endite of 4+6 teeth (two apically cleft). Maxilla (Fig. 7D) outer lobe twice as wide as inner lobe, rounded and covered with thin setae; inner lobe bearing thick setae. Maxilliped (Fig. 7E) with basal article of palp bearing two setae distinct in length; endite subrectangular, medial seta surpassing distal margin. Uropod (Fig. 8A) protopod with glandular pores on outer groove, exopod slightly longer than endopod. Pereopod 1-7 (Fig. 8B, C) merus and carpus with slightly sparse setae on sternal margin; carpus 1 with antennal grooming brush transverse, distal seta apically with five points; dactylus with dactylar seta and ungual seta simple not surpassing outer claw. Genital papilla (Fig. 8D) with triangular ventral shield and subapical orifices. Pleopod 1 (Fig. 8E) exopod subquarangular, twice as wide as long; endopod almost three times as long as exopod, inner margin bearing small setae. Pleopod 2 (Fig. 8F) exopod triangular bearing one seta on outer margin; endopod very long, more than three times as long as exopod. Pleopod 3-5 exopods as in Fig. 8 G–I.

Etymology.

The new species is named after Dr. Georgina Bond-Buckup for all her contributions to the knowledge of crustaceans, including Oniscidea.

Remarks.

Iansaoniscus georginae sp. n. is readily distinguishable from I. iraquara sp. n. in the shape of the cephalon, epimeron of pereonite 1 with reduced dorsolateral furrow, shape of ventral lobes on pereonites 1 and 2, and shape of the male pleopods 1 and 2.