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| Morphology | Ecology and taphonomy | Map | Age range and collections |
Hydrurga leptonyx
Taxonomy
Phoca leptonyx was named by Blainville (1820). It is extant. It is the type species of Hydrurga.
It was recombined as Stenorhynchus leptonyx by Gray (1850), Gill (1866), Gray (1866), Gray (1871) and Gray (1873); it was recombined as Ogmorhinus (Ogmorhinus) leptonyx by Trouessart (1898) and Trouessart (1904); it was recombined as Ogmorhinus leptonyx by Turner (1912); it was recombined as Hydrurga leptonyx by Kellogg (1922), Scheffer and Rice (1963), Koretsky (2001) and Demere et al. (2003).
It was recombined as Stenorhynchus leptonyx by Gray (1850), Gill (1866), Gray (1866), Gray (1871) and Gray (1873); it was recombined as Ogmorhinus (Ogmorhinus) leptonyx by Trouessart (1898) and Trouessart (1904); it was recombined as Ogmorhinus leptonyx by Turner (1912); it was recombined as Hydrurga leptonyx by Kellogg (1922), Scheffer and Rice (1963), Koretsky (2001) and Demere et al. (2003).
Synonymy list
| Year | Name and author |
|---|---|
| 1820 | Phoca leptonyx Blainville |
| 1850 | Stenorhynchus leptonyx Gray p. 13 |
| 1866 | Stenorhynchus leptonyx Gill p. 6 |
| 1866 | Stenorhynchus leptonyx Gray p. 16 |
| 1871 | Stenorhynchus leptonyx Gray p. 4 |
| 1873 | Stenorhynchus leptonyx Gray p. 143 |
| 1898 | Ogmorhinus (Ogmorhinus) leptonyx Trouessart p. 380 |
| 1904 | Ogmorhinus (Ogmorhinus) leptonyx Trouessart p. 283 |
| 1912 | Ogmorhinus leptonyx Turner p. 198 |
| 1922 | Hydrurga leptonyx Kellogg p. 115 |
| 1963 | Hydrurga leptonyx Scheffer and Rice p. 4 |
| 2001 | Hydrurga leptonyx Koretsky p. 86 |
| 2003 | Hydrurga leptonyx Demere et al. p. 49 figs. Fig. 3.3 |
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