| Synonymous name | : | †Anastylops vallatus Ameghino, 1897 | |
Ref: PBDB: 9 Nov 2017. |
| Synonymous name | : | †Dimerostephanos chicoensis Ameghino, 1902 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Entelostylops completus Ameghino, 1901 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Entelostylops tripartitus Ameghino, 1901 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Notostylops ampullaceus Ameghino, 1902 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Notostylops chicoensis Ameghino, 1902 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Notostylops complexus Ameghino, 1901 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Notostylops escaridus Ameghino, 1901 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Notostylops irregularis Ameghino, 1901 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Notostylops promurinus Ameghino, 1904 | |
Ref: PBDB: 26 Jul 2015. |
| Synonymous name | : | †Pliostylops magnificus Ameghino, 1901 | |
Ref: PBDB: 26 Jul 2015. |