期刊
JOURNAL OF NATURAL HISTORY
卷 50, 期 21-22, 页码 1315-1356出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00222933.2015.1130870
关键词
Crustacea; Indocaris gen. nov.; stygofauna; taxonomy
资金
- Ministry of Environment, Forests and Climate Change
- Department of Science and Technology, Ministry of Science and Technology, Government of India, New Delhi [22018/08/2010-CS, SR/SO/AS-21/2011]
Indocaris gen. nov. with two new species, Indocaris imbricata sp. nov. and Indocaris inopinata sp. nov., and also for the already known Indocaris tirupatiensis (Ranga Reddy 2011a) comb. nov. all from the groundwaters in peninsular India. The highly diagnostic synapomorphy of the new genus is a composite character associated with the male leg 4 basis: five or six prominent, imbricate, enlarged, petal-like spinules, arranged as a semiwhorl at the insertion of the endopod and increasing in size from internal to external. Another distinctive feature of the same appendage is that its one-segmented endopod is dilated or bulbous in the proximal half, produced distally into an incurved spiniform or horn-like structure about as long as the corresponding first exopodal segment, and ornamented with three or four fine spinules on the subproximal outer margin. The three species also share a unique constellation of other salient morphologic features, which along with the phylogenetic position of Indocaris gen. nov. within the family Parastenocarididae are discussed. Indocaris gen. nov. has closest phylogenetic affinity with the Neotropical Remaneicari Jakobi, 1972. A short note on the ecology and biogeography of the parastenocaridid species of the Indian subcontinent is provided besides a key for their identification.
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