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Urocyon minicephalus

Mammalia - Carnivora - Canidae

Taxonomy
Urocyon minicephalus was named by Martin (1974). It is not extant. Its type locality is Coleman IIA, which is in an Irvingtonian sinkhole claystone/sandstone in Florida.

It was synonymized subjectively with Urocyon cinereoargenteus by Kurten and Anderson (1980) and Berta (1995); it was synonymized subjectively with Urocyon by Webb and Wilkins (1984).

Synonymy list
YearName and author
1974Urocyon minicephalus Martin
2009Urocyon minicephalus Tedford et al. p. 75 figs. 7, 30; appendices 2, 3

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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()
Epicynodontia
RankNameAuthor
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Laurasiatheria
Scrotifera
Ferae()
CarnivoramorphaWyss and Flynn 1993
CarnivoraformesFlynn et al.
orderCarnivoraBowditch 1821
suborderCaniformiaKretzoi 1943
superfamilyCanoideaSimpson 1931
familyCanidaeFischer 1817
subfamilyCaninaeGill 1872
tribeVulpiniHemprich and Ehrenberg 1832
genusUrocyonBaird 1857
speciesminicephalusMartin 1974

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. H. Tedford et al. 2009Derived relative to U. progressus in shorter parietals. Differs from U. citrinus in possessing the following apo- morphies: m1 less elongate, and m2 relatively smaller with shorter trigonid, paraconid absent, and shorter and angled subangular lobe. Differs from U. galushai in the follow- ing apomorphies: smaller, lower crowned premolars; m2 trigonid shorter, smaller paraconid shelf, stronger anterolabial cingu- lum, stronger protostylid; and mandibular ramus less elongate with less expanded masseteric fossa and angled subangular lobe. Differs from U. cinereoargenteus floridanus in the following plesiomorphies: smaller skull, narrower frontals, greater postorbital con- striction, narrower braincase, less widely separated frontoparietal crests, narrower occiput; M1 with lower crowned paracone and metacone, weaker labial cingulum, smaller paraconule; smaller metaconule; m1 protostylid weaker; and m2 metaconid less posterior and almost directly opposite proto- conid, protostylid weaker. Differs from U. c. scotti in the following plesiomorphies: small- er skull with relatively wider muzzle, narrow- er frontals, greater postorbital constriction, narrower braincase, less lyrate parasagittal crests, narrower occiput. Apomorphies that distinguish U. minicephalus from U. c. scotti are: P4 stronger protocone, stronger ante- rolabial cingulum; M2 metaconule greatly reduced or absent; and m2 less elongate, relatively wider, shorter trigonid, stronger anterolabial cingulum, stronger protostylid.