Review of Euchromadorinae (Nematoda: Chromadorida) with description of a new species of Trochamus Boucher & De Bovée, 1971 from the Sundarban, India Author Datta, Tridip Kumar ENVIS Centre, Zoological Survey of India, M-Block, New Alipore, Kolkata- 700053, India. Author Al-Helal, Md. Abdullah Vidyasagar University, Department of Zoology, Paschim Medinipur, Midnapore- 721102, West Bengal, India. text Zootaxa 2023 2023-05-08 5278 3 493 510 http://dx.doi.org/10.11646/zootaxa.5278.3.4 journal article 10.11646/zootaxa.5278.3.4 66cdc377-c9b8-476a-9cc1-d504e654b52a 1175-5326 7906615 5B09ECEE-2A61-411F-A172-5FD86939905F Rhips Cobb, 1920 (after Tchesunov 2014 ) Cuticle heterogeneous with lateral differentiation as a narrow ridge beginning at the end of the pharynx. Six outer labial and four cephalic setae arranged in a common circle. Amphideal fovea conspicuous transversally oval with a double contour. Pharynx gradually enlarged posteriorly. Spicules double-jointed. Gubernaculum with lateral pieces. Type species: R. ornata Cobb, 1920 List of valid species: R. anoxybiotica Jensen, 1985 R. carenata Pastor de Ward, 1985 R. galapagensis Blome, 1985 R. gracilicauda Blome, 1985 R. orientalis Kulikov, 1993 R. ornata Cobb, 1920 R. paraornata Platt & Zhang, 1982 R. reginae Muthumbi & Vincx, 1998a Taxon inquirendum: R. longicauda Timm, 1961