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Atavocricetodon nanus

Osteichthyes - Rodentia - Cricetidae

Taxonomy
Eucricetodon nanus was named by Pelaez-Campomanes (1995). Its type specimen is DPUCM VAL RQ065, a tooth (m1 inf. dext.), and it is a 3D body fossil. Its type locality is Valdecollares, which is in an Oligocene alluvial fan marl in the Unidad Detritica Inferior Formation of Spain.

It was recombined as Atavocricetodon nanus by Freudenthal (1996).

Synonymy list
YearName and author
1995Eucricetodon nanus Pelaez-Campomanes p. 274
1996Atavocricetodon nanus Freudenthal p. 3

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
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
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
familyCricetidaeFischer von Waldheim 1817
subfamilyEucricetodontinae
genusAtavocricetodon
speciesnanus()

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.

†Atavocricetodon nanus Pelaez-Campomanes 1995
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Diagnosis
ReferenceDiagnosis
P. Pelaez-Campomanes 1995Small-sized species. The metalophulid of the m1 is usually absent. The posterior arm of the hypoconid is present in approximately 50% of the m1. The ectomesolophid is absent in m1. The posterior arm of the protoconid is absent in some m2 but it is long in others. The M1 has a short mesoloph. The metalophule is frequently connected to the hypocone or to the posteroloph in M1. The labial side of the M1 is strongly convex. In the M2 the posterior arm of the protocone is frequently absent.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: viviparoussubc
Created: 2005-08-26 14:04:46
Modified: 2005-08-26 16:04:46
Source: o = order, subc = subclass, c = class, subp = subphylum
References: Nowak 1999, Hendy et al. 2009, Lillegraven 1979, Ji et al. 2002, Carroll 1988

Age range: Early/Lower Oligocene or 33.90000 to 27.30000 Ma

Collections (12 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Oligocene33.9 - 27.3Spain (Aragon) Eucricetodon nanus (68878)
Early/Lower Oligocene33.9 - 27.3Spain (Cuenca) Eucricetodon nanus (183528)
MP 2233.9 - 27.3France Atavocricetodon nanus (183452)
MP 2233.9 - 27.3France (Midi-Pyrenées) Atavocricetodon nanus (167513 167532 167533 167534 167537 183655 183656 183657 183658)