Abstract

The discovery of a skull and partial postcranial skeleton of Dicamptodon from northern Alberta is the earliest certain record of the subfamily Dicamptodontinae. The specimen comes from Late Paleocene lake sediments, which also contain the remains of fish and plants. The close resemblance of the specimen to larvae or neotenes of extant Dicamptodon shows that this family exhibits the common trend of extreme conservatism known from other salamanders. The specimen is found in association with floral assemblages, confirming Nussbaum's hypothesis of the origin of the genus in northwestern North America.

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