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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), Berta (2017); and to Otariidae by Berta et al. (2018), 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), Berta (2017); and to Otariidae by Berta et al. (2018), 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