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 Euchromadora de Man, 1886 (emended after Inglis 1969 , Pastor de Ward 1985 and Tchesunov 2014 ) Complex heterogeneous cuticle, structured with hexagonal or ovoid punctations anteriorly and posteriorly with slimmer markings (transverse striation) restricted to the lateral surface over the middle of the body; lateral plates generally well developed; no prominent lateral differentiation. Cuticle with alternating hooking within rings. Transversally elliptical amphideal fovea without surrounding cuticular fringe. Six outer labial sensilla papilliform and four cephalic sensilla setiform. Buccal cavity with large dorsal tooth, subventral teeth and rows of denticles. No distinct posterior pharyngeal bulb. Gubernaculum with prominent hammer- or L-shaped lateral pieces. Type species: E. vulgaris ( Bastian, 1865 ) de Man, 1886 List of valid species: E. atypica Blome, 1985 E. eileenae Inglis, 1969 E. ezoensis Kito, 1977 E. gaulica Inglis, 1962 E. meadi Wieser & Hopper, 1967 E. permutabilis Wieser, 1954 E. robusta Kulikov, Dashchenko, Koloss & Yushin, 1998 E. striata ( Eberth, 1863 ) de Man, 1886 E. tokiokai Wieser, 1955 E. vulgaris ( Bastian, 1865 ) de Man, 1886