Ranga Reddy, Y.; Totakura, V. R. (2010). A taxonomic revision of the genus Habrobathynella Schminke, 1973, with the description of four new species from southeastern India (Crustacea, Malacostraca, Bathynellacea). Zootaxa. 2532: 1–54.

285382

Ranga Reddy, Y.; Totakura, V. R.

2010

2532: 1–54

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The genus Habrobathynella Schminke, 1973, presently contains six species. Four new species of the genus Habrobathynella, viz. H. krishna n. sp., H. vaitarini n. sp., H. savitri n. sp. and H. vidua n. sp. are described and illustrated herein and their taxonomic position in the genus Habrobathynella discussed. Inhabiting certain rivers and borewells in the State of Andhra Pradesh, southeastern India, these new species introduce several morphologic features that are unique to either the genus or the family Parabathynellidae. The spine row on the uropodal sympod now displays five character states, and high diversity is also seen in the male thoracopod VIII. The salient morphologic characters and their various states in all the habrobathynellid species are reviewed and the original generic diagnosis revised. The palpless mandible with somewhat pyriform pars molaris, bearing 5–6 teeth, is recognised as a signal synapomorphy of Habrobathynella. Two more synapomorphies based on the male thoracopod VIII and caudal furca are added. Considering its special importance in taxonomy, the male thoracopod VIII of the four already known Indian species, viz. H. nagarjunai Ranga Reddy, 2002; H. schminkei Ranga Reddy, 2004; H. indica Ranga Reddy & Schminke, 2005 and H. plenituda Ranga Reddy & Schminke, 2009, has been reexamined based on topotypes and freshly illustrated with line drawings and digital images, and errors in the original accounts are corrected. Also, the ecology, biogeography and conservation of Habrobathynella species are briefly discussed.

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