| 1 |
Reithrodon
|
3.79 ± 0.5 |
Oldest confident record for the genus Reithrodon; basal levels of the Chapadmalal Fm (Buenos Aires, Argentina); absolute age from dated impactites (Prevosti et al., 2021). |
| 2 |
Graomys
|
3.79 ± 0.5 |
Oldest record for the genus Graomys based on Graomys dorae Reig, 1978; basal levels of the Chapadmalal Fm (Buenos Aires, Argentina). |
| 3 |
Scapteromys aquaticus /tumidus
|
1.86 ± 0.09 |
Oldest record for a morphotype indistinguishable from Scapteromys aquaticus or Scapteromys tumidus; based on a specimen collected in Necochea (Buenos Aires, Argentina); age according to paleomagnetic profile (Prevosti et al., 2021) |
| 4 |
Kunsia/Scapteromys (split) |
2.75 ± 0.25 |
Based on Scapteromys hershkovitzi
Reig, 1994 (see Pardiñas, 2013); absolute age base on fission track analysis conducted in Olavarría (M. de los Reyes, 2020, personal communication). |
| 5 |
Akodon montensis
|
0.88 ± 0.105 |
Remains attributed to this species collected near Mar del Plata (Buenos Aires, Argentina; see Reig, 1987); age according to paleomagnetic data (Brunhes-Matuyama limit). |
| 6 |
Necromys
|
2.4 ± 0.2 |
San Andrés Fm; recorded as Bolomys sp. in Reig (1994); age according to paleomagnetic data. |
| 7 |
Kraglievichimys formosus (Phyllotini) |
4.40 ± 0.05 |
Based on remains collected in Irene Fm, Quequén Salado river (Buenos Aires, Argentina; see Pardiñas et al., 2017b; Barbière, Ortiz & Pardiñas, 2019) absolute age from dated impactites (Prevosti et al., 2021). |
| 8 |
Sigmodon curtisi
|
2.00 |
Oldest record of genus Sigmodon stricto sensu (see Peláez-Campomanes & Martin, 2005). |
| 9 |
Akodon johannis
|
1.40 |
Treated as the oldest record of genus Thaptomys (see Reig, 1987). |
| 10 |
Akodon lorenzini
|
2.80 |
Treated as the oldest record of genus Akodon (see Reig, 1987). |
| 11 |
Neotoma sawrockensis
|
4.70 |
Applied to the split between Neotoma and Hodomys (Martin & Zakrzewski, 2019) |
