Morphological studies of Ancyracanthopsis winegardi Wong and Anderson, 1990 (Nematoda: Acuarioidea)and larval stages of acuariid nematodes parasitic in Larus domicanus Lichtenstein (Aves: Laridae)from Argentina

FLORENCIA CREMONTE; NAVONE, GRACIELA TERESA; ETCHEGOIN, JORGE ALEJANDRO

SYSTEMATIC PARASITOLOGY

SPRINGER

Año: 2000 vol. 45 p. 135 - 140

0165-5752

We described Ancyracanthopsis winegardi Wong & Anderson, 1990 (Nematoda: Acuarioidea) from Larus dominicanus Lichtenstein (Aves: Laridae) in the Southwest Atlantic coast (38°42’S, 59°47’W). The main character used to distinguish species of the genus Ancyracanthopsis is the morphology of the ptilina. Thus, although the specimens described here have some differences in the morphology and size of spicules and in the female genitalia, they were referred to A. winegardi because they have a very similar ptilina. This is the first record of a member of the genus Ancyracanthopsis from larid birds and for A. winegardi in the Southwest Atlantic coast. Moreover, we studied acuariod larvae found inhabiting the gizzard with adult specimens of A. winegardi and Sciadiocara haematopodi Cremonte, Navone & Etchegoin, 1998. Principal Component Analysis (PCA) was applied in order to determine their taxonomical assignment. The larvae, according the results of PCA and the morphology of the partially developed ptilina observed in some specimens, seem to belong to Sciadiocara haematopodi.