| Synonymous name | : | †Amphitemnus nucleatus Ameghino, 1904 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Amphitemnus transitorius Ameghino, 1904 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Eochalicotherium cretaceum Ameghino, 1901 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Isotemnus conspiquus Ameghino, 1897 | |
Ref: PBDB: 9 Nov 2017. |
| Synonymous name | : | †Trimerostephanos angustus (Ameghino, 1897) | |
Ref: PBDB: 9 Nov 2017. |