Table 2.
Comparative measurements (in mm) of monachine p4.
| length of crown | height of crown | width of crown | |
|---|---|---|---|
| Monachinae gen. et sp. indet. (LACM 122584) | 12.7 | 6.8 | 6.2 |
| Monachinae gen. et sp. indet. (LACM 52624) | — | 6.1 | — |
| Monachinae gen. et sp. indet. (UF 45683) | 14.5 | 8.1 | 7.0 |
| Acrophoca sp. (MNHN.CHL 5) | 13.4 | 9.3 | 4.4 |
| Acrophoca longirostris (MNHN.F.SAS 644) | 15.5 | 7.5 | 5.2 |
| Acrophoca longirostris (MNHN.F.SAS 648) | 13.8 | 7.3 | 5.0 |
| Hadrokirus martini (MNHN.F.SAS 1627)a | 16.0 | 8.7 | 8.8 |
| Properiptychus argentinus (MACN 3538b)b | 12.8 | 7.0 | 7.0 |
| Neomonachus schauinslandi (LACM 54438) | 13.7 | 6.5 | 7.9 |
| Neomonachus schauinslandi (LACM 54384) | 13.5 | 7.8 | 8.3 |
| Neomonachus schauinslandi (LACM 52355) | 13.8 | 6.9 | 7.6 |
| Neomonachus schauinslandi (LACM 52392) | 13.0 | 8.3 | 7.7 |
| Neomonachus tropicalis (UF 36456) | 15.5 | 8.2 | 7.7 |