Articulated remains of a Pennsylvanian embolomere (Amphibia: Anthracosauria) from Joggins, Nova Scotia

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Abstract
Two recently discovered specimens of a medium-sized embolomerous amphibian contribute to our knowledge of the vertebrate fauna of Joggins, Nova Scotia (Cumberland Group; Pennsylvanian, Westphalian B). One specimen comprises a series of vertebrae from the sacral and proximal caudal regions, left ilium, and portions of the left hind limb, and the other includes an articulated series of nine posterior trunk vertebrae and associated ribs, most of the hind limb, and gastralia. It is unique among embolomeres in possessing both complete, disc-shaped intercentra and dorsally open, crescentic intercentra in a single presacrai vertebral series. Both are interpreted as larger individuals of Calligenethlon watsoni, an embolomere once believed to be characterized by small adult size. These specimens pertain to the largest tetrapod recovered to date from an upright lycopod stump at Joggins.

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