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Published: 2021-10-22

A new species of Caridina H. Milne Edwards, 1837 (Family: Atyidae) from a limestone cave on Interview Island, Andaman and Nicobar Islands, India

Kerala University of Fisheries and Ocean Studies, Kochi 682 506, Kerala, India.
Sálim Ali Centre for Ornithology and Natural History, Coimbatore, Tamil Nadu, India.
Sálim Ali Centre for Ornithology and Natural History, Coimbatore, Tamil Nadu, India.
Crustacea Caridina ravisankarani sp. nov. Atyidae cave fauna Andaman Islands Stygobite


Caridina ravisankarani sp. nov. is a cave-adapted species, collected during June and November 2018 and January 2019 from a limestone cave (CN2) on Interview Island, Andaman and Nicobar Islands. The shrimps were collected from a stream, sourced through the percolation of rainwater, which reduces during the post-monsoon months. The species is closely related to Caridina typus H. Milne Edwards, 1837, Caridina villadolidi Blanco, 1939 and Caridina jeani Cai, 2010. A detailed comparison of characters and a key for identification are given in the text. The present species can be diagnosed by the presence of: short rostum with edentulous upper margin and ventral margin with 2 minute teeth situated at the distal part; outer antennular flagellum with 16 segments at the basal part swollen; highly atrophied propodus and dactylus of endopod of 2nd maxilliped; bushy long setae on fingers of 2nd chelate legs; dactylus of 5th pereopod with 42–43 comb-like bristles; dieresis with 18 spines; dorsal surface of telson with 4–5 pairs of spines and disto-median region doesn’t end in a point, outer lateral pair of spines absent and eyes with cornea pigmentation variable, from totally absent to a small black spot. Fecundity is 1300 eggs with an average length 0.71±0.03 mm and width 0.42±0.03 mm (Mean±SD).



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How to Cite

VIJAYAMMA, J. K. ., DHAMORIKAR, A. ., & MANCHI, S. . (2021). A new species of <em>Caridina</em> H. Milne Edwards, 1837 (Family: Atyidae) from a limestone cave on Interview Island, Andaman and Nicobar Islands, India. Zootaxa, 5057(3), 402–414.