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Eucyon davisi

Mammalia - Carnivora - Canidae

Taxonomy
Canis davisi was named by Merriam (1911). Its type specimen is UCMP 545, a set of teeth, and it is a 3D body fossil.

It was recombined as Eucyon davisi by Tedford and Qiu (1996), Spassov and Rook (2006), Wang et al. (2008) and Tedford et al. (2009).

Synonyms
Synonymy list
YearName and author
1911Canis davisi Merriam p. 242 figs. 11 - 13
1937Leptocyon shermanensis Hibbard
1942Vulpes shermanensis Gregory
1956Canis condoni Shotwell
1996Eucyon davisi Tedford and Qiu
2006Eucyon davisi Spassov and Rook
2008Eucyon davisi Wang et al.
2009Eucyon davisi Tedford et al. p. 92 figs. 27, 33C–T, 34A–Q, 35A–S, 36A–B, 39, 40, 43–44, 50–52, 60C, 61C; appendices 2–4

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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()
Mammaliamorpha
Mammaliaformes
RankNameAuthor
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Ferae()
CarnivoramorphaWyss and Flynn 1993
CarnivoraformesFlynn et al.
orderCarnivora
familyCanidae
subfamilyCaninaeGill 1872
tribeCaniniFischer de Waldheim 1817
genusEucyon
speciesdavisi()

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.

Eucyon davisi Merriam 1911
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Invalid names: Canis condoni Shotwell 1956 [synonym], Leptocyon shermanensis Hibbard 1937 [synonym]
Diagnosis
ReferenceDiagnosis
R. H. Tedford et al. 2009Eucyon davisi differs from E.? skinneri in its larger size; longer jaw; more elongate, taller crowned premolars; p4 with second posterior cusp; m1 trigonid relatively longer, protoconid taller crowned, entoconid and hypoconid taller crowned, and larger hypoconulid shelf.
Eucyon davisi differs from Canis ferox and C. lepophagus in its smaller size and less robust skull and jaws; frontal sinus ends well before frontoparietal suture; jugal shallower relative to length of skull; width of skull across cheek teeth greater relative to length of skull; sagittal crest weaker; inion wider (never narrows to a point); premolars less robust; p4 anterolabial border generally less rounded; M1 paracone and metacone lower crowned and nearly subequal in size with stronger labial cingulum and stronger parastyle; m1 talonid without transverse crest between entoconid and hypoconid and hypoconulid shelf relatively smaller; angular process of mandible less expanded with smaller fossae for pterygoid muscle; and radius/tibia ratio less than 80%.