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Reigechimys octodontiformis

Osteichthyes - Rodentia - Echimyidae

Taxonomy
Reigechimys octodontiformis was named by Verzi et al. (1994). Its type specimen is MLP 65-VII-29-107, a mandible, and it is a 3D body fossil. Its type locality is Salinas Grandes de Hidalgo, which is in a Huayquerian fluvial siltstone in the Epecuén Formation of Argentina. It is the type species of Reigechimys.

Entered
by M. Uhen on 2007-05-15; modified by M. Kouvari on 2020-08-06

Synonymy list
YearName and author
1994Reigechimys octodontiformis Verzi et al. fig. 3
2014Reigechimys octodontiformis Sostillo et al. p. 289

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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()
—Mammaliamorpha
RankNameAuthor
—Mammaliaformes
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentia
—CtenohystricaHuchon et al. 2000
infraorderHystricognathi(Tullberg 1899)
—Caviomorpha(Wood and Patterson 1955)
superfamilyOctodontoideaWaterhouse 1839
familyEchimyidaeGray 1825
genusReigechimys
speciesoctodontiformis

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.

†Reigechimys octodontiformis Verzi et al. 1994
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Diagnosis
ReferenceDiagnosis
R. Sostillo et al. 2014Dp4 trilophodont with small mesolophid (or metalophulid II?) spur. Lower molars with mesoflexid more ephemeral than that of R. plesiodon. Mesoflexid trans- formed into mesofossettid in m1 and replaced by mesofosset- tid in m2 during early ontogenetic stages. Mesofossettid of m1 absent when metaflexid begins to close.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: scansorialf
Diet: herbivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-26 13:44:11
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Hendy et al. 2009, Nowak 1991, Carroll 1988, Ji et al. 2002, Lillegraven 1979

Age range: Huayquerian or 8.00000 to 5.00000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Huayquerian8.0 - 5.0Argentina (La Pampa) Reigechimys octodontiformis (type locality: 87198 152066 204598 206260)