| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Hydrarctos was named by Muizon (1978).
It was reranked as Arctocephalus (Hydrarctos) by Muizon (1978).
It was assigned to Arctocephalus by Muizon (1978); to Arctocephalinae by McKenna and Bell (1997); to Otariinae by Koretsky and Barnes (2006); to Otariidae by Berta (2002), Deméré et al. (2003), Berta (2009) and Berta (2017); and to Otariidae by Berta et al. (2018) and Tsuzuku and Kohno (2020).
It was reranked as Arctocephalus (Hydrarctos) by Muizon (1978).
It was assigned to Arctocephalus by Muizon (1978); to Arctocephalinae by McKenna and Bell (1997); to Otariinae by Koretsky and Barnes (2006); to Otariidae by Berta (2002), Deméré et al. (2003), Berta (2009) and Berta (2017); and to Otariidae by Berta et al. (2018) and Tsuzuku and Kohno (2020).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Arctocephalus (Hydrarctos) Muizon p. 171 |
| 1978 | Hydrarctos Muizon p. 171 |
| 1997 | Hydrarctos McKenna and Bell p. 254 |
| 2002 | Hydrarctos Berta p. 923 |
| 2003 | Hydrarctos Deméré et al. p. 49 figs. Fig. 3.3 |
| 2006 | Hydrarctos Koretsky and Barnes p. 145 |
| 2009 | Hydrarctos Berta p. 863 |
| 2017 | Hydrarctos Berta p. 156 |
| 2018 | Hydrarctos Berta et al. p. 210 figs. Fig. 5 |
| 2020 | Hydrarctos Tsuzuku and Kohno p. 6 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: t = tribe, c = class, uc = unranked clade | |||||
| References: Nowak 1991, Hendy et al. 2009, Carreño and Cronin 1993, Gingerich 2003 | |||||
Age range: base of the Messinian to the top of the Piacenzian or 7.24600 to 2.58800 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tortonian - Messinian | Peru | H. lomasiensis (46083) | |
| Messinian | Peru | Arctocephalus lomasiensis (13079) | |
| Piacenzian | Peru | H. sp. (219058) |