Cucullanus marplatensis sp. nov. (Nematoda, Cucullanidae) parasitizing Odontesthes argentinensis (Valenciennes, 1835) (Pisces, Atherinidae) from Argentinean waters

DANIEL, VIVIANA INGRID; TIMI, JUAN TOMÁS; SARDELLA, NORMA HAYDÉE

ACTA PARASITOLOGICA

VERSITA

Lugar: Varsovia; Año: 2002

1230-2821

A total of 61 specimens of Odontesthes argentiniensis (Valenciennes, 1835) from waters off Mar del Plata (38°08´S 57°32´W) werre examined for intestinal parasites. A new nematodes species, Cucullanus marplatensis sp. nov. is described (prevalence 42,2%, mean intensity 6,17). The new species differsfrom its congeners from the Southwest Atlantic by the following characters: body size, spicules length, number and distribution pattern of caudal papillae and the position of the excretory pore and deirids. Additionally, voucher specimens of Cucullanus heterochrous Rudolphi, 1802 cited by Szidat (1961) from Urophysis brasiliensis from Puerto Quequén, Argentina (38°37´S 58°53´W) were also examined and described; their morphology and morphometry do not agree either with those of C. marplatensis sp. nov. or C. heterochrous described from others regions of the world. They could not be identified to species because of the poor preservation of specimens and, therefore, they are designated as Cucullanus sp.