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Acta Parasitologica, Vol.46, No. 1, 2001, 8-11
Moravec Frantisek (1)*, Aguilar-Aguilar Rogelio (2), Salgado-Maldonado Guillermo (2) - Systematic status of Capillaria patzcuarensis Osorio-Sarabia, Perez-Ponce de Leon et Salgado-Maldonado, 1986 (Nematoda, Capillariidae) from freshwater fishes in Mexico.

(1)Institute of Parasitology, Academy of Sciences of the Czech Republic, Branisovska 31, 370 05 Ceske Budejovice, Czech Republic; (2) Institute of Biology, National Autonomous University of Mexico (UNAM), A.P. 70-153, 04510 Mexico, D.F., Mexico

A recent new collection of intestinal capillariids from the atherinid fish Chirostoma estor Jordan, a type host of Capillaria patzcuarensis Osorio-Sarabia, Perez-Ponce de Leon et Salgado-Maldonado, 1986, from Lake Patzcuaro in 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 goodeid Alloophorus robustus (Bean) from the same locality. All main morphological and biometrical features of this species correspond to Pseudocapillaria tomentosa (Dujardin, 1843) and, therefore, C. patzcurarensis is considered a junior synonym of P. tomentosa. The Mexican specimens are briefly described and illustrated. This Holarctic, little-host specific nematode species may have been introduced into Lake Patzcuaro along with the introduction of carp, Cyprinus carpio L., in the lake.

KEY WORDS: Parasitic nematode, Capillaria patzcuarensis, Pseudocapillaria tomentosa, fish, Chirostoma estor, Alloophorus robustus, Patzcuaro Lake, Mexico
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