. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 16. Carpodaptes hazelae Simpson. Above: PU 21351, right dentary with P4-M3, medial view. Note pres- ence of 6 apical cusps. Below: PU 21350, right dentary with P4 cusps. Both â 6. Both from Cedar Point Quarry. M3, medial view. Note presence of 5 apical preserving P4 (AMNH 33981) is nearly intermediate between these two morphol- ogies, suggesting that the difference is not taxonomically significant. In addition to the Scarritt Quarry and Cedar Point Quarry remains referred to this species, there are a few specim
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 16. Carpodaptes hazelae Simpson. Above: PU 21351, right dentary with P4-M3, medial view. Note pres- ence of 6 apical cusps. Below: PU 21350, right dentary with P4 cusps. Both â 6. Both from Cedar Point Quarry. M3, medial view. Note presence of 5 apical preserving P4 (AMNH 33981) is nearly intermediate between these two morphol- ogies, suggesting that the difference is not taxonomically significant. In addition to the Scarritt Quarry and Cedar Point Quarry remains referred to this species, there are a few specimens from the Late Torrejonian Shotgun Local Fauna (MCZ Nos. 18763, 18776, 18777, 19683, 19684) that are closely comparable to C. hazelae. They are the earliest recorded representatives of the genus Carpodaptes, and the only ones known from pre-Tif- fanian sediments. An isolated P4 (UMVP 5007) from the Circle Local Fauna, Tongue River For- mation, near Circle, Montana, is probably referable to C. hazelae. Specimens of Carpodaptes from the Ravenscrag Formation in Alberta were referred to Carpodaptes, cf. C. hazelae, by Krishtalka (1973), although (as he noted) they are smaller than typical C. hazelae. They are closer in size and morphology to Carpodaptes cygneus and are here tenta- tively referred to the latter. The dental morphology of C. hazelae has been described in detail by Simpson (1936, 1937a). No new material has been re- covered from Scarritt Quarry since Simp- son's work, and the material he described in 1937 still includes some of the most complete carpolestid specimens known. Among the Cedar Point specimens are several which preserve the anterior portion of the mandible, but only alveoli are pre- served anterior to P3. From these speci- mens it is clear that there were three diminutive, single-rooted teeth between the large medial incisor and P4. I interpret these as a lateral incisor, the canine, and P3. P3 is preserved in only one specimen, PU. Please note that the
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