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Apternodus mediaevus

Mammalia - Apternodontidae

Taxonomy
Apternodus mediaevus was named by Matthew (1903). Its type specimen is AMNH 9601, a mandible (lower jaw with P2, P4, M2, and M3), and it is a 3D body fossil. Its type locality is Pipestone Springs, which is in a Chadronian terrestrial claystone in the Renova Formation of Montana.

Synonymy list
YearName and author
1903Apternodus mediaevus Matthew p. 202 fig. 2
1976Apternodus mediaevus Novacek p. 17

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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
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Eulipotyphla
suborderSoricomorphaGregory 1910
superfamilySoricoideaGill 1872
familyApternodontidaeMatthew 1910
genusApternodus
speciesmediaevus

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.

Apternodus mediaevus Matthew 1903
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Diagnosis
ReferenceDiagnosis
W. D. Matthew 1903Molars composed of high trigonid and minute basal talonid. Protoconid high, sharp, and triangular, paraconid and metaconid subordinate. Dentition probably i, c, p3 m3 •
Talonid a small sharp cusp on m3 ; on m. it is a Ininute postero• internal basal cusplet. The third molar a little smaller than the second; both are two-rooted, the anterior root wider transversely.
The cusps are all high, sharp, trigonal in cross-section, the whole tooth subtriangular with transverse and longitudinal diameters about equal and vertical diameter consider ably exceeding either. The heel is much smaller than in Centetidre, the protoconid higher and larger in proportion than in any other Insectivore or Chiropter.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: scansorialsubc
Diet: insectivoresubc
Reproduction: viviparoussubc
Created: 2005-09-06 20:43:42
Modified: 2005-09-06 22:44:32
Source: subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Carroll 1988, Hendy et al. 2009, Ji et al. 2002

Age range: Chadronian or 37.20000 to 33.90000 Ma

Collections (10 total)


Time interval Ma Country or state Original ID and collection number
Chadronian37.2 - 33.9USA (South Dakota) Apternodus mediaevus (17006)
Chadronian37.2 - 33.9USA (Montana) Apternodus mediaevus (16924 16925 16935 16946 16959 16988 type locality: 17010 17041)
Late/Upper Chadronian37.2 - 33.9USA (Montana) Apternodus mediaevus (17027)