…extreme southwestern Canada; 1 genus, Dicamptodon, and 4 species.Family Plethodontidae (lungless salamanders)Very small to moderate size, 3.5 to about 30 cm; includes the most specialized and most terrestrial salamanders and the only truly tropical species; lungless; nasolabial grooves present; no ypsiloid cartilage; Early Miocene (23 million–about 16
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