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Tetrastylus laevigatus

Mammalia - Rodentia - Dinomyidae

Taxonomy
Tetrastylus laevigatus was named by Ameghino (1886) [Sostillo et al. (2022), the holotype was lost, and for this reason, Nasif (2009) designed a new one in her doctoral thesis, not published yet: MACN 3518 right hemimandible, with incisor and complete dental series. We acept her proposal.]. Its type specimen is MACN 3518, a mandible (right hemimandible, with incisor and complete dental series), and it is a 3D body fossil. Its type locality is Parana, Pueblo Brugo to Diamante, Ituzaingo Fm., which is in a Huayquerian marine sandstone/mudstone in the Ituzaingo Formation of Argentina.

Synonymy list
YearName and author
1886Tetrastylus laevigatus Ameghino

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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()
—Mammaliamorpha
—Mammaliaformes
RankNameAuthor
classMammalia
—Cladotheria
—Zatheria
subclassTribosphenida()
subclassTheria
—Eutheria()
—Placentalia
—Boreoeutheria
—EuarchontogliresMurphy et al. 2001
—GliriformesWyss and Meng 1996
—Glires()
—Simplicidentata()
orderRodentiaBowdich 1821
—CtenohystricaHuchon et al. 2000
infraorderHystricognathi(Tullberg 1899)
—Caviomorpha(Wood and Patterson 1955)
superfamilyChinchilloideaBennett 1833
familyDinomyidaePeters 1873
subfamilyEumegamyinaeKraglievich 1926
genusTetrastylusAmeghino 1886
specieslaevigatusAmeghino 1886

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.

†Tetrastylus laevigatus Ameghino 1886
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: frugivoref
Diet 2: folivoref
Reproduction: viviparoussubc
Created: 2005-06-08 10:11:09
Modified: 2005-08-26 13:32:01
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Nowak 1991, Carroll 1988, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009

Age range: Huayquerian or 8.00000 to 5.00000 Ma

Collections (8 total)


Time interval Ma Country or state Original ID and collection number
Huayquerian8.0 - 5.0Argentina (La Pampa) Tetrastylus laevigatus (87198 152065 152066 230751) Tetrastylus sp. (152061)
Huayquerian8.0 - 5.0Argentina (Catamarca) Tetrastylus laevigatus (198546 198547)
Huayquerian8.0 - 5.0Argentina (Entre Rios) Tetrastylus laevigatus, Tetrastylus sp. (type locality: 55600)