The Coal Measures Amphibia of North America

by Roy Lee Moodie

Amblyodon problematicum Dawson.

Dawson, Phil. Trans. Roy. Soc. London, pt. II, p. 644, pl. 40, figs. 57 to 61, 1882.

Type: Specimen No. 3061-10, Peter Redpath Museum, McGill University.

Fig. 38.—Skeletal elements of Amblyodon sp. from the Coal Measures of Nova Scotia.
a, tooth, × 25; b, section of tooth, × 25; d, fragment of thoracic plate; f, shaft of limb bone; e, rib.

Horizon and locality: Coal Measures of Nova Scotia.

A fragment of a jaw 1 cm. in length has 10 cylindrical teeth, simple and smooth, with large pulp cavities and rounded regularly at the apices. With these are 4 vertebræ of the usual type, measuring together 1 cm. Fragments of cranial bones also occur and are obscurely pitted. There is also what seems to be the shaft of a limb bone and a few oval scales. A flat and somewhat rhombic bone, with a style at one side, may possibly be a thoracic plate or possibly a parasphenoid.

The material is too scanty for any satisfactory description of this animal, but it is provisionally named Amblyodon problematicum.