Open Access Open Access  Restricted Access Subscription or Fee Access

A new species of freshwater crab of the genus Oziotelphusa Müller, 1887 (Crustacea: Decapoda: Brachyura: Gecarcinucidae) from Tamil Nadu, southern India

SMRITHY RAJ, APPUKUTTANNAIR BIJU KUMAR, PETER K. L. NG

Abstract


A new species of gecarcinucid freshwater crab of the genus Oziotelphusa Müller, 1887, is described from stationary or slow-flowing bodies of water in Keeriparai near Nagercoil, in the state of Tamil Nadu in southern India. Oziotelphusa ravi, new species, is distinguished from its congeners by several distinct characters: the median tooth of the posterior margin of epistome forms a distinct bilobed tip in frontal view, the male pleonal somite 6 is narrowly trapezoidal and slightly wider than long with the lateral margins concave, the terminal segment of the male first gonopod is distinctly bent laterally (along the longitudinal axis) at an angle of about 45°, and the proximal part of the outer margin of the subterminal segment of the male first gonopod has a prominent deep concavity.

 


Keywords


Crustacea, Taxonomy, new freshwater crab, Nagercoil, Tamil Nadu, rice fields

Full Text:

PDF (16MB)

References


Bahir, M.M. & Yeo, D.C.J. (2005) A revision of the genus Oziotelphusa Müller, 1887 (Crustacea: Decapoda: Brachyura: Parathelphusidae), with descripton of eight new species. Raffles Bulletin of Zoology, 12 (Supplement), 77–120.

Bahir, M.M. & Yeo, D.C.J. (2007) The gecarcinucid freshwater crabs of southern India (Crustacea: Decapoda: Brachyura). Raffles Bulletin of Zoology, 16 (Supplement), 309–354.

Davie, P.J.F., Guinot, D. & Ng, P.K.L. (2015) Anatomy and functional morphology of Brachyura. In: Castro, P., Davie, P.J.F., Guinot, D., Schram, F.R. & von Vaupel Klein, J.C. (Eds.), Treatise on Zoology – Anatomy, Taxonomy, Biology. The Crustacea. Volume 9C-I. Decapoda: Brachyura. Part 1. Brill, Leiden, pp. 11–163.
https://doi.org/10.1163/9789004190832_004

Kumar, A.B., Raj, S. & Ng, P.K.L. (2017) Description of a new genus and new species of a completely arboreal crab (Decapoda: Brachyura: Gecarcinucidae) from the Western Ghats in India, with notes on the ecology of arboreal crabs. Journal of Crustacean Biology, 37 (2), 157–167.
https://doi.org/10.1093/jcbiol/rux012

Ng, P.K.L. (1988) The freshwater crabs of Peninsular Malaysia and Singapore. Department of Zoology, National University of Singapore & Shinglee Press, Singapore,156 pp.

Ng, P.K.L. & Tay, F.W.M. (2001) The freshwater crabs of Sri Lanka (Decapoda: Brachyura: Parathelphusidae). Zeylanica, 6, 113–199.

Pati, S.K., Dev Roy, M.K. & Sharma, R.M. (2012) Freshwater Crabs. In: Checklist of Indian Fauna. Zoological Survey of India, Kolkata, pp.1–5.

Pati, S.K. & Sharma, R.M. (2012) Oziotelphusa ganjamensis, a new species of freshwater crab (Brachyura: Gecarcinucidae) from south Odisha (Orissa) state, eastern India. Zootaxa, 3528, 49–56.

Pati, S.K., Rajesh, L., Raj, R., Sheeja, V.U., Kumar, A.B. & Sureshan, P.M. (2017) Karkata, a new genus of gecarcinucid freshwater crab with two new species, and four new species of Pilarta Bahir and Yeo, 2007 and Cylindrotelphusa Alcock, 1909 (Decapoda: Brachyura) from Kerala, India. Journal of Natural History, 51 (23–24), 1295–1330.
https://doi.org/10.1080/00222933.2017.1324054

Raghavan, R., Dahanukar, N., Philip, S., Iyer, P., Kumar, B., Daniel, B.A. & Molur, S. (2015) Conservation status of freshwater decapod crustaceans in the Western Ghats of India: an exceptional region of freshwater biodiversity. Aquatic Conservation: Marine and Freshwater Ecosystems, 25, 259–275.
https://doi.org/10.1002/aqc.2490




DOI: http://dx.doi.org/10.11646/zootaxa.4363.2.3

Refbacks

  • There are currently no refbacks.


 
ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand