[MM] Gobiconodon hopsoni
DESCRIBER Rougier, Novacek, McKenna & Wible, 2001
TIME Cretaceous Early
FOSSILSITE Cannonball Member, Oshih Formation, Mongolia, Asia
Gobiconodon borissiaki (Trofimov, 1978) > Gobiconodon hoburensis (Trofimov, 1978 )[ >> Guchinodon hoburensis (Trofimov, 1978 )] > Gobiconodon hopsoni (Rougier, Novacek, McKenna and Wible, 2001) > Gobiconodon ostromi (Jenkins and Schaff, 1988) > Gobiconodon zofiae (Li, Wang, Hu & Meng, 2003) > Gobiconodon sp. (1) (Rougier, Novacek, McKenna & Wible, 2001) > Gobiconodon sp. (2) (Tang et al., 2001) > Gobiconodon sp. (3) (Cuenca-Bescós & Canudo, 2003 )
[Gobiconodon sp.(2) PSS-MAE 137, anterior fragment of a right dentary; PSS-MAE 138, posterior fragment of a right dentary] PSS-MAE 137 and PSS-MAE 138 , represent a second gobiconodontid taxon at Oshih. Both were found at the same locality where the lower jaw fragment of Gobiconodon hopsoni was discovered. These two specimens, the proximal and distal portions of a right lower jaw, were found a few inches away from each other and may belong to the same individual.
The original name of the Oshih Formation (Berkey and Morris, 1927) is considered in the Russian literature (Shuvalov, 1975) as part of the Tevsh (Undurukhin) Svita.
PSS-MAE 140, Holotype of Gobiconodon hopsoni, sp. nov. Fragmentary right maxilla
Etymogie: After Dr. James A. Hopson, one of a selected few who can comfortably straddle the blurry non-mammalian cynodont mammalian boundary, with impressive contributions to both segments of therapsid history.
Holotype: Partial right maxilla (PSSMAE 140) preserving the last molariforms and fragments of the two preceding molariforms.
Referred speciemen: PSS-MAE 139, a fragment of right lower jaw with a broken, unerupted molariform and alveoli for two more anterior teeth. The lower jaw specimens were collected at 448549020N; 1028539110E.
Rougier, G. W., Novacek, M. J., McKenna, M. C., and Wible, J. R. (2001) Gobiconodonts from the Early Cretaceous of Oshih (Ashile), Mongolia: American Museum Novitates, n. 3348, 30pp.