Orientogidiella indica ( Holsinger, Ranga Reddy, and Messouli, 2006 ) Sidorov & Reddy & Shaik, 2018

Sidorov, Dmitry, Reddy, Yenumula Ranga & Shaik, Shabuddin, 2018, Groundwater amphipods (Crustacea, Malacostraca) of India, with description of three new cavernicolous species, Zootaxa 4508 (3), pp. 403-426 : 411-413

Orientogidiella indica ( Holsinger, Ranga Reddy, and Messouli, 2006) , new combination

Bogidiella indica Holsinger, Ranga Reddy, and Messouli, 2006: 45 , Figs 1–5 .

Distribution. Previously recorded from three water-wells in Andra Pradesh state of the southeastern India ( Holsinger et al. 2006) (see Fig. 1 ).

New record. INDIA: nine specimens MNHN-IU- 2018-49 : 3 ♀♀ measuring 3.5 mm each, oostegites undeveloped, 3 ♀♀ measuring 3.25 mm each, oostegites undeveloped, 2 ♂♂ measuring 2.75 mm each, ca. 1.5 mm fragment, Guthikonda caves, cave-pool sediments, 16.395112, 79.827492, elevation 160 m, Andhra Pradesh state, coll. Shabuddin Shaik, 6 th June 2014 .

Remarks. Specimens from the Guthikonda caves agree well with the original description in all essential characters, but a couple of them are at variance: (1) maxilla I outer plate with 7 instead of 6 spines, but their serrate nature is close to the original description (in Holsinger et al. 2006, p. 47); (2) gnathopods I and II in both sexes with two shallow dentations on inner face of dactyli accompanied by a thin seta each (similar to those in O. reducta sp. n.); specimens from the Guthikonda caves reached maturity at a smaller body size: largest males 2.75 mm, largest females 3.25–3.5 mm.

Figures

FIGURE 1. Height map of India showing geographic distribution of subterranean amphipods. Question mark (?) indicates collections of undescribed specimens of Bogidiella sp. reported in Holsinger et al. (2006). Asterisk (*) indicates new sample sites.

FIGURE 2. Habitus of examined specimens: (A) Orientogidiella reducta gen. n., sp. n., holotype MNHN-IU-2018-47, male, 5.5 mm; (B) Bogidiella hindustanica sp. n., holotype MNHN-IU-2018-50, female, 2.75 mm; (C) Indoniphargus subterraneus sp. n., holotype MNHN-IU-2018-52, female, 5.2 mm.

FIGURE 3. Orientogidiella reducta gen. n., sp. n., holotype MNHN-IU-2018-47, male, 5.5 mm: (A) head; (B) antenna I; (C) antenna II; (D) mandible, right; (E) mandible, left; (F) paragnaths (=lower lip); (G) maxilla I; (H) maxilla II; (I) maxilliped. Scale bars 0.1 mm.

FIGURE 4. Orientogidiella reducta gen. n., sp. n., holotype MNHN-IU-2018-47, male, 5.5 mm: (A) gnathopod I; (B) gnathopod II; (C) pereopod III; (D) pereopod IV; (E) pereopod V; (F) pereopod VI; (G) pereopod VII. Scale bars 0.2 mm.

FIGURE 5. Orientogidiella reducta gen. n., sp. n., holotype MNHN-IU-2018-47, male, 5.5 mm: (A) pleonal plates I–III and pleopods I–III; (B) urosome; (C) uropod I; (D) uropod II; (E) uropod III; (F) telson. Scale bars 0.2 mm.