Redescription of Oswaldocruzia pipiens Walton, 1929 (Nematoda: Trichostrongylidae) from amphibians of eastern North America

Abstract

Oswaldocruzia pipiens Walton, 1929 from the small intestine of Rana pipiens Shreber, R. sylvatica LeConte, R. clamitans melanota Latreille, Pseudacris triseriata triseriata Wied, Hyla versicolor LeConte, and Bufo americanus americanus Holbrook from southern Ontario is redescribed. O. collaris Walton, 1929 and O. euryceae Reiber, Byrd and Parker, 1940 are regarded as synonyms of O. pipiens. O. leidyi Travassos, 1917 is regarded as a nomen nudum and O. waltoni Ingles, 1936 and O. minuta Walton, 1941 as species inquirendae. O. pipiens most closely resembles O. goezei Skrjabin and Schulz, 1952. However, the terminal ends of the lateral distal processes of the spicules are divided into numerous small projections in O. goezei, whereas in O. pipiens each process divides into two incompletely separated projections. There is a slender, lateral spur on each lateral distal process in O. goezei, which are not present in O. pipiens.