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Leptocyon gregorii
Taxonomy
Nothocyon gregorii was named by Matthew (1907). Its type locality is AMNH Rosebud 19, which is in a Harrisonian terrestrial horizon in the Harrison Formation of South Dakota.
It was recombined as Hesperocyon gregorii by Macdonald (1963), Macdonald (1970); it was recombined as Leptocyon gregorii by Wang and Tedford (1992), Wang et al. (2008), Tedford et al. (2009).
It was recombined as Hesperocyon gregorii by Macdonald (1963), Macdonald (1970); it was recombined as Leptocyon gregorii by Wang and Tedford (1992), Wang et al. (2008), Tedford et al. (2009).
Synonymy list
| Year | Name and author |
|---|---|
| 1907 | Nothocyon gregorii Matthew |
| 1963 | Hesperocyon gregorii Macdonald |
| 1970 | Hesperocyon gregorii Macdonald |
| 1992 | Leptocyon gregorii Wang and Tedford p. 224 |
| 2008 | Leptocyon gregorii Wang et al. |
| 2009 | Leptocyon gregorii Tedford et al. p. 27 figs. 3, 5, 7, 10A–F, 11A–E, 17; appendices 2, 3 |
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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.
†Leptocyon gregorii Matthew 1907
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. H. Tedford et al. 2009 | L. gregorii differs from L. vulpinus in smaller size; slender P4, weaker M1 parastyle; smaller premolars; less robust m1 with trigonid and talonid narrower relative to length; and proportionally smaller m2. Differs from L. leidyi and L. vafer in smaller dentition, retention of m2 paraconid, and proportionally longer and more inflated bullae. L. gregorii differs from L. vafer in narrower cranium with greater cerebellar exposure, retaining postparietal foramina; weaker m2 anterolabial cingulum; and m2 with subequal protoconid and metaconid. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Ji et al. 2002, Carroll 1988, Lillegraven 1979, Nowak 1991 | |||||
Age range: Harrisonian or 23.10000 to 18.50000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Harrisonian | USA (South Dakota) | Hesperocyon gregorii (type locality: 17456) Leptocyon gregorii (17519) | |
| Harrisonian | USA (Wyoming) | Leptocyon gregorii (17794 17811 17815) | |
| Harrisonian | USA (Nebraska) | Nothocyon gregorii (17846) |