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Michenia exilis

Mammalia - Camelidae

Taxonomy
Oxydactylus exilis was named by Matthew and Macdonald (1960). Its type specimen is AMNH 12997, a partial skeleton (partial skull and fore and hind limbs), and it is a 3D body fossil. Its type locality is AMNH Rosebud 5, which is in a Harrisonian terrestrial horizon in the Rosebud Formation of South Dakota.

It was recombined as Michenia exilis by Honey and Taylor (1978), Honey et al. (1998), Honey (2007).

Synonyms
  • Michenia australis was named by Stevens (1977). Its type specimen is TMM 40871-1, a partial skeleton (a left mandible with P2-M3, a partial left Ml, the distal end of a humerus, the proximal end and other fragments of a left metacarpus with its unciform, and fra), and it is a 3D body fossil. Its type locality is Castolon (TMM 40871), which is in an Arikareean terrestrial horizon in the Delaho Formation of Texas.

    It was synonymized subjectively with Michenia exilis by Honey and Taylor (1978), Honey et al. (1998).
Synonymy list
YearName and author
1960Oxydactylus exilis Matthew and Macdonald p. 2 figs. 1 - 4
1977Michenia australis Stevens p. 48 figs. 15A-D
1978Michenia exilis Honey and Taylor
1998Michenia exilis Honey et al.
2007Michenia exilis Honey p. 188

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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()
familyCamelidae
subfamilyProtolabinaeZittel 1893
genusMichenia
speciesexilis()

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.

†Michenia exilis Matthew and Macdonald 1960
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Invalid names: Michenia australis Stevens 1977 [synonym]
Diagnosis
ReferenceDiagnosis
W. D. Matthew and J. R. Macdonald 1960I1-M8 (estimated), 172 mm.; P2-M8, 88mm. Incisors and canine small, p1 compressed, two-rooted, with a long diastema behind it, p2-4 of subequal length,P4 longer than wide, P8 with anterior and posterior inner cingula not quite meeting medialy. Molars very brachyodont. Muzzle slender, antorbital fossa round, well defined. Lower jaw slender anteriorly, canine moderately compressed, close to incisors, long diastemata behind canine and P1. P3 with rudimentary inner crest, paraconids of premolars distinct.
M. S. Stevens 1977 (Michenia australis)Differs from Michenia agatensis by its smaller size, more prominent molar styles and ribs, and unfused metacarpal; from Miotylopus by its more prominent molar styles and ribs.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: browserf
Diet 2: browserf
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-31 16:42:02
Source: f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Nowak 1991, Nowak 1999, Carroll 1988, Hendy et al. 2009

Age range: Harrisonian or 23.10000 to 18.50000 Ma

Collections (5 total)


Time interval Ma Country or state Original ID and collection number
Arikareean29.5 - 18.5USA (Texas) Michenia australis (178058)
Harrisonian23.1 - 18.5USA (Texas) Michenia australis (17767 17769 17776)
Harrisonian23.1 - 18.5USA (South Dakota) Oxydactylus exilis (type locality: 17745)