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Sthenictis bellus

Mammalia - Carnivora - Mustelidae

Taxonomy
Sthenictis bellus was named by Matthew (1932). Its type specimen is AMNH 20501, a mandible (a right ramus of the lower jaw, with p2 - m1 preserved), and it is a 3D body fossil. Its type locality is Thomson Quarry, which is in a Hemingfordian terrestrial horizon in the Sheep Creek Formation of Nebraska.

Synonymy list
YearName and author
1932Sthenictis bellus Matthew p. 1 fig. 1

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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()
Epicynodontia
RankNameAuthor
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Laurasiatheria
Scrotifera
Ferae()
CarnivoramorphaWyss and Flynn 1993
CarnivoraformesFlynn et al.
orderCarnivoraBowditch 1821
suborderCaniformiaKretzoi 1943
familyMustelidaeFischer 1817
subfamilyGuloninae()
tribeIschyrictini
genusSthenictis
speciesbellus

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
W. D. Matthew 1932-Sizemuch less than S. dolichops, about equal to Mionictis incerta or Brachypsalis matutinus, but agrees with Sthenictis and differs from the other two in the construction and proportions of the carnassial and premolars. The second third and fourth premolars are two-rooted, compressed, not crowded, p4 with well developed posterior accessory cusp. The shear of the carnassial is nearly anteroposterior, the metaconid well developed but not nearly as high as in Mionictis or Brachypsalis. The last molar has a single alveolus, which apparently contained a large anterior and smaller posterior root, closely connate. In S. dolichops the alveolus is round-oval apparently for a single root.