Abstract
Somatic chromosomes obtained from corneal squash preparations of nine species representing four genera of the anuran family Leptodactylidae were analyzed and compared. <i>Batrachyla leptopus, Crossodactylus gaudichaudii, Cyclorhamphus fuliginosus, Eupsophus coppingeri, E</i>. <i>taeniatus </i>and <i>Thoropa miliaris </i>were found to possess 26 chromosomes (n = 13). <i>E</i>. <i>roseus </i>has 30 chromosomes (n = 15), <i>E</i>. <i>vertebralis </i>has 28 chromosomes (n = 14) and <i>E</i>. <i>nodosus </i>has 22 chromosomes (n = 11). The karyotypes of some species of <i>Eupsophus </i>are more similar intergenerically than intragenerically. This suggests that <i>Eupsophus </i>is an unnatural assemblage of species. Characters previously used to delimit genera of leptodactylid frogs are criticized.
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