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Leptocyon douglassi
Taxonomy
Leptocyon douglassi was named by Tedford et al. (2009). Its type specimen is NMNH 19931, a partial skull (partial palate with P4–M2 and left ramus with c and p2–m2), and it is a 3D body fossil. Its type locality is Canyon Ferry Bonebed, which is in an Arikareean terrestrial horizon in Montana.
Synonymy list
| Year | Name and author |
|---|---|
| 2009 | Leptocyon douglassi Tedford et al. p. 19 figs. 5, 6A–G, 7; appendix 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 douglassi Tedford et al. 2009
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. H. Tedford et al. 2009 | Leptocyon douglassi differs from all other Arikareean species by its derived p3 lacking posterior cusp, m2 with long talonid (.90% of trigonid length), and absence of m2 paraconid. Additionally, it differs from L. vulpinus in its smaller size and relatively narrower and lower crowned pre- molars; from L. gregorii in averaging smaller in size, M2 having metaconule, and P4 of greater width with stronger protocone; and from L. mollis in its smaller size and proportionally smaller M1 and M2. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Ji et al. 2002, Carroll 1988, Hendy et al. 2009, Nowak 1991 | |||||
Age range: Geringian or 29.50000 to 24.70000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Geringian | USA (South Dakota) | Hesperocyon leptodus (17641) Leptocyon douglassi (17654) | |
| Geringian | USA (Oregon) | Leptocyon douglassi (159093) | |
| Geringian | USA (Montana) | Leptocyon douglassi (17722) | |
| Arikareean | USA (Montana) | Leptocyon douglassi (type locality: 17481) |