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Leptarctus

Mammalia - Carnivora - Mustelidae

Synonyms
Synonymy list
YearName and author
1856Leptarctus Leidy
1902Leptarctus Hay p. 764
1941Mephititaxus White
1954Hypsoparia Dorr p. 179
1988Leptarctus Carroll
1998Leptarctus Baskin p. 158
2000Hypsoparia Lim and Miao
2001Leptarctus Lim and Martin p. 314
2002Hypsoparia Lim and Martin p. 270
2003Leptarctus (Pseudoleptarctus) Lim and Martin
2005Leptarctus Baskin
2009Leptarctus Bever and Zakrzewski p. 466
2009Leptarctus Korth and Baskin p. 31
2010Leptarctus Robles et al. p. 550
2017Leptarctus Baskin pp. e1293069-12

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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
familyMustelidaeFischer 1817
subfamilyLeptarctinaeGazin 1936
genusLeptarctus

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
J. A. Dorr 1954 (Hypsoparia)Skull size and general proportions, except for zygomatic arch, about that of Leptarctus primus Leidy (1856). Skull broad across zygomae. Muzzle short, deep, and wide. Two separate, prominent, broad and heavy temporal crests. Dental formula I 3?/3, C 1/l, P 3/3, Ml?/2. P, with well developed posterior accessory cuspule external to midline; quadrangular in outline with well developed hypocone; paracone and metacone separated by a distinct notch. M~ quadrate, longest on labial side of crown; protocone more anteriorly placed and hypoconal crescent stronger than in Craterogale Gazin (1936); differs from Mephititaxus White (1941) in being smaller, less inflated, and longer than wide. Orbit small, subcircular, nearly closed behind. Zygomatic arch extremely large, more so than in Leptarctus Leidy (1956) as revised by l\fatthew (1924); height just posterior to orbit equal to or slightly greater than orbital height, becoming higher posteriorly; greatest height just anterior to glenoid cavity about one and three-quarters times orbital height; ventral edge grooved for reception of masseter muscle. Lower jaw large and heavily built, as in Leptarctus wortmani Matthew (1924); anterior edge of coronoid rising steeply, masseteric fossa deep. M, reduced.