PaleoDB taxon number: 50921
Alternative combinations: Blastomeryx texanus, Cranioceras texanus, Dromomeryx texanus, Syndyoceras texanus
Synonyms: Dromomeryx angustidens Hay 1924 (no. 45930), Merycodus grandis Hay 1924 (no. 48281), Syndyoceras australis White 1941 (no. 51965), Synthetoceras douglasi White 1947 (no. 51970), Synthetoceras rileyi Frick 1937 (no. 51972)
Full reference: O. P. Hay. 1924. Description of some fossil vertebrates from the Upper Miocene of Texas. Proceedings of the Biological Society of Washington 37:1-18
- Prosynthetoceras texanus: Its type locality is Garvin Gully, which is in a Hemingfordian terrestrial horizon in the Oakville Formation of Texas
- Dromomeryx angustidens:
- Merycodus grandis: Its type locality is Garvin Gully, which is in a Hemingfordian terrestrial horizon in the Oakville Formation of Texas.
- Syndyoceras australis: pl. XV, figs. 2 and 2a, a mandible (a right lower jaw with p1 and p4-m3.). Its type locality is Thomas Farm, which is in a Hemingfordian terrestrial sandstone/claystone in the Alachua Formation of Florida.
- Synthetoceras douglasi:
- Synthetoceras rileyi: Its type locality is Akin Hill, which is in a Miocene terrestrial horizon in the Fleming Formation of Texas.
Ecology: ground dwelling browser
Average measurements (in mm): M1 13.6 x 14.8, M2 17.2 x 15.9, M3 17.0 x 16.8, m1 13.0 x 9.5, m2 16.5 x 14.4, m3 24.0 x 11.0