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Temnocyon altigenis

Mammalia - Carnivora - Amphicyonidae

Taxonomy
Temnocyon altigenis was named by Cope (1878) [genotype; also said to be 1878]. Its type specimen is AMNH 6855, a mandible (This genus is only known froma mandibularramus which siipportsall the teeth excepting the incisors and probablythe last molar.), and it is a 3D body fossil.

Synonymy list
YearName and author
1878Temnocyon altigenis Cope p. 68
1879Temnocyon altigenis Cope
1899Temnocyon altigenis Wortman and Matthew p. 130
1906Temnocyon altigenis Merriam p. 21 figs. Pl. 3, Fig. 2, and Text-figures 7 - 11
1998Temnocyon altigenis Hunt, Jr. p. 208
2011Temnocyon altigenis Hunt, Jr. p. 23 figs. 4 - 8, 65

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumVertebrata
Gnathostomata()
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
RankNameAuthor
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Laurasiatheria
Scrotifera
Ferae()
CarnivoramorphaWyss and Flynn 1993
CarnivoraformesFlynn et al.
orderCarnivoraBowditch 1821
suborderCaniformiaKretzoi 1943
familyAmphicyonidaeHaeckel 1886
subfamilyTemnocyoninae
genusTemnocyon
speciesaltigenis

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.

Diagnosis
ReferenceDiagnosis
R. M. Hunt 2011Smallest and most plesio- morphic North American temnocyonine spe- cies distinguished from all other species of Temnocyon by small size and range of m1 lengths, 17.4–19.5 mm (table 2), and from T. subferox, T. fingeruti, and T. percussor by either M1 or P4 proportions (dental ratios A/B, C/D, table 6); from T. ferox and the huge T. macrogenys by much smaller size. Ratio of m1/m2 lengths, 1.67–1.83, indicating a short m2 relative to m1, thus distinct from species of Mammacyon (1.57, 1.61) but not from other Temnocyon species (ratios of 1.62–1.79) or Delotrochanter (1.64–1.69). Basilar length of skull, ,16–18 cm relative to 21–30 cm for other Temnocyon species (table 7); frontal sinuses moderately inflated.