A new species of Rhabdochona Railliet, 1916 (Nematoda: Rhabdochonidae) from endemic goodeids (Cyprinodontiformes) from two Mexican lakes.
A new species of Rhabdochona from 2 species of freshwater fishes, Alloophorus robustus and Goodea atripinnis, is described from 2 lakes of the Mesa Central of Mexico. Rhabdochona lichtenfelsi n. sp. belongs to a group of species possessing inconspicuous bifurcated deirids and a prostom armed with 10 large teeth. It is distinguished from them because the left spicule is shorter, the tip is bifurcate, and both spicules lack a reflected dorsal barb. The new species most closely resembles Rhabdochona catostomi and Rhabdochona milleri but differs from them because the former possesses a left spicule tip with ventral barb, right spicule with reflected distal barb, and 5 pairs of postanal papillae, whereas R. milleri has 14 prostomal teeth, eggs rounded, and left spicule with slightly outlined bifurcation and right with a dorsal barb. Previous records of R. milleri in Mexico must be referred to R. lichtenfelsi.
Sánchez-Alvarez
A
A
Laboratorio de Helmintología, Instituto de Biología, Universidad Nacional Autónoma de México, México DF.
García-Prieto
L
L
Pérez-Ponce de León
G
G
D000818:Animals; D003532:Cyprinodontiformes / Q000469:parasitology*; D005260:Female; D005393:Fish Diseases / Q000469:parasitology*; D005618:Fresh Water; D008297:Male; D008800:Mexico; D008855:Microscopy, Electron, Scanning; D009348:Nematoda / Q000033:anatomy & histology / Q000145:classification* / Q000648:ultrastructure; D009349:Nematode Infections / Q000469:parasitology / Q000662:veterinary*