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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), Berta (1995); it was synonymized subjectively with Urocyon by Webb and Wilkins (1984).
It was synonymized subjectively with Urocyon cinereoargenteus by Kurten and Anderson (1980), Berta (1995); it was synonymized subjectively with Urocyon by Webb and Wilkins (1984).
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Urocyon minicephalus Martin |
| 2008 | Urocyon minicephalus Wang et al. |
| 2009 | Urocyon minicephalus Tedford et al. p. 75 figs. 7, 30; appendices 2, 3 |
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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.
†Urocyon minicephalus Martin 1974
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. H. Tedford et al. 2009 | Derived 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. |
Measurements
No measurements are available
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| Source: g = genus, f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Ji et al. 2002, Hendy et al. 2009, Gebo and Rose 1993, Carroll 1988, Lillegraven 1979 | |||||
Age range: Irvingtonian or 1.80000 to 0.30000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Irvingtonian | USA (Florida) | Urocyon minicephalus (type locality: 20289 20415) |