Systematic status of Capillaria patzcuarensis Osorio-Sarabia, Perez-Ponce de Leon et Salgado-Maldonado, 1986 (Nematoda, Capillariidae) from freshwater fishes in Mexico

A recent new collection of intestinal capillariids from the atherinid fish Chirostoma estor Jordan, a type host of Capillaria patzcuarensis Osorio-Sar abia, Perez-Ponce de Leon et Salgado-Maldonado, 1986, from Lake Patzcuaro i n Michoacan, Mexico (type locality) made it possible to study in detail the morphology of this insufficiently known nematode parasite. Morphologically identical and apparently conspecific females were also recorded from the g oodeid Alloophorus robustus (Bean) from the same locality. All main morphol ogical and biometrical features of this species correspond to Pseudocapilla ria tomentosa (Dujardin, 1843) and, therefore, C. patzcurarensis is conside red a junior synonym of P. tomentosa. The Mexican specimens are briefly des cribed and illustrated. This Holarctic, little-host specific nematode speci es may have been introduced into Lake Patzcuaro along with the introduction of carp, Cyprinus carpio L., in the lake.