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Leptocyon leidyi

Mammalia - Carnivora - Canidae

Taxonomy
Leptocyon leidyi was named by Tedford et al. (2009). Its type specimen is UNSM 25715, a partial skull, and it is a 3D body fossil. Its type locality is Hemingford Quarry 12D, which is in a Hemingfordian terrestrial horizon in the Runningwater Formation of Nebraska.

Synonymy list
YearName and author
2009Leptocyon leidyi Tedford et al. p. 31 figs. 7, 11F–I, 12C–J, 13A–F, 17

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Ferae()
—CarnivoramorphaWyss and Flynn 1993
—CarnivoraformesFlynn et al.
orderCarnivora
familyCanidae
subfamilyCaninaeGill 1872
genusLeptocyon
speciesleidyi

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 leidyi Tedford et al. 2009
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Diagnosis
ReferenceDiagnosis
R. H. Tedford et al. 2009L. leidyi differs from L. gregorii in dentition averaging slightly larger (fig. 7), proportionally shorter and less inflated bulla, and tendency to reduce and lose postproto- crista of M2, and loss of paraconid of m2. L. leidyi averages smaller than L. vafer with 95% confidence interval of m1 length nearly separated (fig. 7); m2 slightly longer relative to length of m1, it lacks enlargement of m2 anterolabial cingulum and short nasals that characterize L. vafer, but it shares lack of postprotocrista on M2.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: carnivoref
Diet 2: omnivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-22 19:28:06
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Carroll 1988, Ji et al. 2002, Nowak 1991, Lillegraven 1979, Hendy et al. 2009

Age range: Hemingfordian or 20.43000 to 15.97000 Ma

Collections (25 total)


Time interval Ma Country or state Original ID and collection number
Harrisonian24.8 - 18.5USA (Nebraska) Leptocyon leidyi (17842)
Early/Lower Hemingfordian20.43 - 15.97USA (Nebraska) Leptocyon leidyi (17932 type locality: 17942 17978)
Hemingfordian20.43 - 15.97USA (Oregon) Leptocyon leidyi (208512)
Hemingfordian20.43 - 15.97USA (Nebraska) Leptocyon leidyi (17902 17920 17952 18000 18001) Leptocyon sp. (17970)
Barstovian16.3 - 12.5USA (Nevada) Leptocyon leidyi (159094)
Barstovian16.3 - 12.5USA (California) Leptocyon leidyi (19356 19364 19366 19463 19510 19548)
Early/Lower Barstovian16.3 - 12.5USA (Nebraska) Leptocyon leidyi (17955 17956 17972 17976) Leptocyon vafer (17905)
Early/Lower Barstovian16.3 - 12.5USA (New Mexico) Leptocyon leidyi (19547 19611)