Two new species of free-living marine nematodes of the family Oxystominidae Chitwood, 1935 (Enoplida) with a review of the genus Thalassoalaimus de Man, 1893 from the Argentine coast

PASTOR DE WARD, CATALINA T.; MARTELLI, ANTONELA; LO RUSSO, VIRGINIA; VILLARES, GABRIELA; PASTOR DE WARD, CATALINA T.; MARTELLI, ANTONELA; LO RUSSO, VIRGINIA; VILLARES, GABRIELA

ZOOTAXA

MAGNOLIA PRESS

Lugar: Auckland; Año: 2017 vol. 4250 p. 347 - 357

1175-5326

Two new free-living marine nematodes of the family Oxystominidae are described from San Antonio Bay (Río Negro)and San José Gulf (Chubut). Litinium australis sp. n., is characterized by having a rounded tail, by the first and secondcrown of cephalic setae with different lengths, gubernaculum with apophysis and by the presence of at least four precloacalpapillae; Thalassoalaimus nestori sp. n., is characterized by having a conical tail, cephalic setae equal in length, gubernaculumwith rounded and dorso-caudally directed apophysis and two precloacal papillae. An emended diagnosis of thegenus Thalassoalaimus and a key to species are given.