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 Trochamus Boucher & De Bovée, 1971 (emended after Boucher & De Bovée 1971 and Tchesunov 2014 ) Body cuticle heterogeneous and complex interlocking pattern like roof-tiles; lateral differentiation crest-like. Six outer labial and four cephalic setae arranged in one crown. Amphideal fovea small loop-shaped or poorly visible transverse slit. Buccal cavity armed with one dorsal tooth and two small subventral denticles. Spicule and gubernaculum simple without any accessory pieces. No post-cloacal modifications in male. Type species: T. carinatus Boucher & de Bovée, 1971 List of valid species: T. bulbosa Muthumbi & Vincx, 1998b T. carinatus Boucher & de Bovée, 1971 T. complexus Boucher, 1976 T. polki Muthumbi & Vincx, 1998b T. prosoporus Blome, 1985 T. timmi sp.n.