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Oreonetes anceps

Mammalia - Merycoidodontidae

Taxonomy
Limnenetes anceps was named by Douglass (1902). Its type specimen is CM 745, a partial skull (Anterior portion of skull with C/(rt.)-M3 (P1-P2 alv.)), and it is a 3D body fossil. Its type locality is Thompson Creek, which is in a Chadronian terrestrial claystone in Montana. It is the type species of Oreonetes.

It was recombined as Oreonetes anceps by Loomis (1924), Peterson (1928), Thorpe (1937), Scott (1940), Schultz and Falkenbach (1956), Lander (1998), Tabrum and Nichols (2001), Stevens and Stevens (2007).

Synonymy list
YearName and author
1902Limnenetes anceps Douglass p. 262
1924Oreonetes anceps Loomis p. 373 figs. Plate LIII, Plate LIV, figs, 1 and 2
1928Oreonetes anceps Peterson
1937Oreonetes anceps Thorpe p. 43 figs. Fig. 3; PI. I, figs. 6-8; PI. II, figs. 1-2
1940Oreonetes anceps Scott
1956Oreonetes anceps Schultz and Falkenbach p. 458 fig. 12
1998Oreonetes anceps Lander
2001Oreonetes anceps Tabrum and Nichols
2007Oreonetes anceps Stevens and Stevens p. 159

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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()
suborderTylopoda()
familyMerycoidodontidae
subfamilyOreonetinae
genusOreonetes
speciesanceps()

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.

†Oreonetes anceps Douglass 1902
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Diagnosis
ReferenceDiagnosis
C. B. Schultz and C. H. Falkenbach 1956SKULL: Approximate size of examples of Limnenetes platyceps; slightly larger than holotype of O. anceps douglassi, slightly smaller than those of Miniochoerus (Paraminiochoerus) gracilis, noticeablylarger than examples of Bathygenys alpha; orbit questionably closed posteriorly (see discussion, p. 457) ; nasals longer and lighter than in example of L. platyceps, less distancefrom posterior border of M8 to postglenoid process than found in L. platyceps.
MANDIBLE: Ramus slightly deeper than in examples of L. platyceps; condyle moderately light, external border higher and directed more posteriorly than internal border.
DENTITION: Series approximately same length as those of L. platyceps, longer than in type of O. anceps douglassi, less length than in examples of M. (Paraminiochoerus) gracilis, decidedly longer and larger than those of Bathygenys alpha, P1-P4 each with weak anterior intermediate crest; M3 with more width than length (anteroposteriorly).
LIMBS:Unknown
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: herbivoref
Reproduction: viviparoussubc
Created: 2005-08-31 14:37:21
Modified: 2005-08-31 16:37:21
Source: f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Lander 1998, Hendy et al. 2009, Nowak 1999, Lillegraven 1979, Carroll 1988

Age range: Chadronian or 37.00000 to 33.90000 Ma

Collections (2 total)


Time interval Ma Country or state Original ID and collection number
Chadronian37.0 - 33.9USA (Montana) Limnenetes anceps (type locality: 17028) Oreonetes anceps (16990)