CONTRIBUCION AL CONOCIMIENTO DE LOS NEMATODOS DE LAS AVES DE MEXICO IV

Resumen

SUMMARY.
Oxyspirura toroi differs from the known species in number and arrangement of the  preanal and postanal papillae: a pair of small and poorly
developed is found in the preanal region and another well developed (post anal)
in the middle distance between the cloaca and the posterior end.