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 Steineridora Inglis, 1969 (emended after Inglis, 1969 , Kito 1977 , Pastor de Ward 1985 and Tchesunov 2014 ) Body and cuticle typically Euchromadora -like. The cuticle is honeycomb-type with alternate hooking between rings. Lateral cuticle region as slimmer transverse bulge or processes developed at one side of each annule. Lateral plates poorly developed; no prominent lateral differentiation. Massive squarish dorsal onchium and sickle-like prominent onchia laterally and ventrally. Amphideal fovea narrow transverse slit without cuticular fringe. Six labial sensilla papilliform; six outer labial and four cephalic sensilla setiform in one circle. Oesophagus with posterior bulb. Cuticular markings always about same size over full length of body laterally. Gubernaculum with prominent L-shaped lateral pieces; no pre-cloacal supplements or other modifications of cuticle. Tail relatively short and stout. Type species: S. loricata ( Steiner, 1916 ) Inglis, 1969 List of valid species: S. adriatica ( Daday, 1901 ) Inglis, 1969 S. archaica ( Steiner & Hoeppli, 1926 ) Inglis, 1969 S. borealis Kito, 1977 S. loricata ( Steiner, 1916 ) Inglis, 1969