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Stibarus obtusilobus

Mammalia - Leptochoeridae

Taxonomy
Stibarus obtusilobus was named by Cope (1873) [genotype]. It is a 3D body fossil.

Synonyms
Synonymy list
YearName and author
1873Menotherium lemurinum Cope
1873Stibarus obtusilobus Cope p. 3
1874Menotherium lemurinum Cope p. 22
1899Leptochoerus lemurinus Matthew
1901Leptochoerus lemurinus Matthew
1902Stibarus obtusilobus Hay p. 672
1902Menotherium lemurinum Hay p. 792
1902Leptochoerus lemurinus Osborn
1905Leptochoerus lemurinus Trouessart
1909Leptochoerus lemurinus Matthew
1940Stibarus obtusilobus Scott p. 374
1953Stibarus lemurinus Galbreath
1955Stibarus lemurinus Macdonald
1976Stibarus obtusilobus Edwards p. 100 figs. Figures 1 & 2
2007Stibarus obtusilobus Theodor et al. p. 55
2022Stibarus obtusilobus Korth et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
subclassSynapsida
—Therapsida()
infraorderCynodontia()
RankNameAuthor
—Mammaliamorpha
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—Laurasiatheria
—Scrotifera
—Euungulata
—Artiodactylamorpha
—Artiodactyla()
superfamilyDichobunoideaGill 1872
familyLeptochoeridae
genusStibarus
speciesobtusilobus

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.

†Stibarus obtusilobus Cope 1873
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Invalid names: Stibarus lemurinus Cope 1874 [synonym]
Diagnosis
ReferenceDiagnosis
E. D. Cope 1873Thin premolar with large anterior lobe and posterior heel. Median lobes obtuse; three last lobes connected by a low..edge: Enamel slightly rugose
P. Edwards 1976Stibarus obtusilobus is the smallest of the leptochoerine species, less than two-thirds the size of S. quadricuspis, with a very weakly developed hypocone on the upper molars. The lingual apex of the triangular upper molars is sharper than the lingual apex of S. quadricuspis upper molars. The cingulum is developed only around the anterior end of the lower molars.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: grazero
Diet 2: browsero
Reproduction: viviparoussubc
Created: 2005-08-26 14:03:05
Modified: 2005-09-19 12:23:23
Source: o = order, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, Nowak 1999, Lillegraven 1979, Carroll 1988

Age range: base of the Chadronian to the top of the Orellan or 37.20000 to 33.30000 Ma

Collections (20 total)


Time interval Ma Country or state Original ID and collection number
Chadronian37.2 - 33.9USA (Colorado) Stibarus obtusilobus (16977)
Late/Upper Chadronian - Orellan37.2 - 33.3USA (Nebraska) Stibarus obtusilobus (230806)
Orellan33.9 - 33.3USA (Colorado) Stibarus lemurinus (17081 17082)
Orellan33.9 - 33.3USA (Nebraska) Stibarus lemurinus (17098) Stibarus obtusilobus (17127 17135 17212 17216 17220 17221 17231 17236 17240 17268 17271 17273 17275)
Orellan33.9 - 33.3USA (South Dakota) Stibarus obtusilobus (17094 17174)