Amphicynodon

Diversité décrite (Catalogue of Life)

Distribution biogéographique

• DISTRIBUTION: Early Oligocene of northcentral Mongolian People’s Republic. Dashzeveg (1996: fig. 1) reported that Amphicynodon teilhardi occurs in both the lower Tatal Member and upper Shand Member of the Hsanda Gol Formation. An undescribed record was reported in the early Oligocene Khatan­Khayrkhan locality of Altai Province of Mongolia by Russell and Zhai (1987: 324). EMENDED DIAGNOSIS: As the only known species from Asia, Amphicynodon teilhardi differs from all European species of the genus, except A. velaunus, in its shortened m 2, along with a correspondingly reduced M 2, in contrast to a primitively long m 2 and large M 2 in most European species. A. teilhardi primitively retains a distinct posterior accessory cusp on p 4, which is lost or extremely reduced in the European A. gracilis, A. speciosus, and A. velaunus. A. teilhardi further differs from European A. typicus, A. gracilis, and A. crassirostris in its relatively low hypoconid of m 1 with wrinkled enamel, in contrast to a trenchant talonid in the latter three species.1 esp.

Régions biogéographiques agrégées depuis Catalogue of Life Cross-References (distribution par espèce déclarative).

Taxons enfants directs (7)

• Espèce Amphicynodon sp. 11
• Espèce Amphicynodon sp. 3
• Espèce Amphicynodon teilhardi2
• Espèce Amphicynodon typicus
• Genre Aymardia
• Genre Cynodon
• Genre Paracynodon