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Temnocyon macrogenys

Mammalia - Carnivora - Amphicyonidae

Taxonomy
Temnocyon macrogenys was named by Hunt (2011). Its type specimen is F:AM 54139, a partial skeleton (eft mandible with canine alveolus, p1–2, broken roots of pathologic p3, complete p4–m3, with most of the ascending ramus, articular condyle, and angular process), and it is a 3D body fossil. Its type locality is Guernsey, which is in a Harrisonian terrestrial horizon in the Marsland Formation of Wyoming.

Synonymy list
YearName and author
2011Temnocyon macrogenys Hunt, Jr. p. 45 figs. 20, 21

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
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
speciesmacrogenys

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 2011Largest species of Temnocyon (basilar length, ,30 cm, table 7), and the only large temnocyonine in which the plesio- morphic cusp pattern of the lower teeth is retained: m1 shear maintained; metaconids present on m1–2; m1/m2 ratio, 1.62, the lowest among Temnocyon species (table 6). Depth of mandible below m1, ,50 mm; below p2, 46 mm. Mandibular dental mea- surements highest values among species of Temnocyon: length of toothrow, p1–m3, 135 mm; lengths in mm of p2, 16.6; p4, 22.1; m1, 28.2; m2, 17.4 (table 2).