Two new species of Enoplolaiminae (Enoplida: Thoracostomopsidae) from Río Negro and Chubut, Argentina Author Pastor, Catalina Laboratorio de Meiofauna Marina (LAMEIMA) - Instituto de Diversidad y Evolución Austral (IDEAus-CONICET), Blvd. Alte. Brown 2915, U 9120 ACF Puerto Madryn, Chubut, Argentina. Author Russo, Virginia Lo Laboratorio de Meiofauna Marina (LAMEIMA) - Instituto de Diversidad y Evolución Austral (IDEAus-CONICET), Blvd. Alte. Brown 2915, U 9120 ACF Puerto Madryn, Chubut, Argentina. text Zootaxa 2021 2021-08-12 5020 2 337 351 journal article 4919 10.11646/zootaxa.5020.2.6 c3e10ccb-bbbe-429a-923e-d26c53ed923b 1175-5326 5223356 62CF216D-1C3F-4E56-BDD7-89592697121C Genus Enoplolaimus de Man, 1893 Diagnosis . From Fadeeva & Zograf, 2010 . Enoplolaiminae . Cuticle usually smooth or finely striated. Cephalic region blunt, anteriorly rounded, with distinct external groove at base of cephalic capsule. Inner labial setae long, inserted at base of lip lobes; outer labial and cephalic setae situated at posterior edge of cephalic capsule. Three thin triangular lip-lobes with or without semi-lunar striation. Three broad, arched, mandibular plates, not solid medially as seen in Enoploides Saweljev, 1912 or Epacanthion Wieser, 1953 . Anterior curved rim with short pointed tips projecting into stoma. One dorsal and two ventrosublateral equal or unequal onchia. Cephalic capsule well developed, broad, posteriorly divided into six lobes. Single ventral pre-cloacal sensory supplementary organ present or absent. Spicules not very elongated, straight or arcuate, with or without apophyses.