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Tremacyllus impressus

Mammalia - Notoungulata

Taxonomy
Pachyrucos impressus was named by Ameghino (1888). Its type specimen is MACN A 1377, a partial skull (cranial fragment with both cheek tooth series), and it is a 3D body fossil.

It was recombined as Tremacyllus impressus by Ameghino (1891), Rovereto (1914), Cerdeno and Bond (1998) and Vera and Ercoli (2018).

Synonyms
Synonymy list
YearName and author
1888Pachyrucos impressus Ameghino p. 13
1888Pachyrucos diminutus Ameghino p. 14
1891Tremacyllus diminutus Ameghino p. 241
1891Tremacyllus impressus Ameghino p. 241
1908Tremacyllus chapalmalensis Ameghino p. 422
1908Tremacyllus novus Ameghino p. 422
1914Tremacyllus diminutus Rovereto p. 117
1914Tremacyllus impressus Rovereto p. 117
1914Tremacyllus intermedius Rovereto p. 118
1914Tremacyllus chapalmalensis Rovereto p. 182
1914Tremacyllus novus Rovereto p. 183
1998Tremacyllus impressus Cerdeno and Bond p. 806 figs. 9, 10
2018Tremacyllus impressus Vera and Ercoli

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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
—AfrotheriaStanhope et al. 1998
—Paenungulatomorpha
—PaenungulataSimpson 1945
—Sudamericungulata
orderNotoungulata
suborderTypotheriaZittel 1892
—Hegetotheriidae(Ameghino 1894)
—Pachyrukhinae(Kraglievich 1934)
—Pachyrukhini
genusTremacyllusAmeghino 1891
speciesimpressus(Ameghino 1888)

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.

†Tremacyllus impressus Ameghino 1888
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Invalid names: Tremacyllus chapalmalensis Ameghino 1908 [synonym], Tremacyllus diminutus Ameghino 1888 [synonym], Tremacyllus intermedius Rovereto 1914 [synonym], Tremacyllus novus Ameghino 1908 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: scansorialsubc
Diet: herbivoreo
Reproduction: viviparoussubc
Created: 2009-01-05 17:11:49
Modified: 2009-01-05 19:11:49
Source: o = order, subc = subclass, c = class, subp = subphylum
References: MacFadden et al. 1996, Hendy et al. 2009, Ji et al. 2002, Carroll 1988, Lillegraven 1979

Age range: base of the Messinian to the top of the Lujanian or 7.24600 to 0.01200 Ma

Collections (29 total)


Time interval Ma Country or state Original ID and collection number
Chasicoan - Huayquerian10.0 - 5.0Argentina (La Pampa) Tremacyllus impressus (204494)
Huayquerian8.0 - 5.0Argentina (La Pampa) Tremacyllus impressus (87198 140925 151498 151500 152061 152063 204598 206031)
Huayquerian8.0 - 5.0Argentina (Mendoza) Tremacyllus impressus (200444 231327)
Huayquerian8.0 - 5.0Argentina (La Rioja) Tremacyllus sp. (55596)
Huayquerian8.0 - 5.0Argentina (Buenos Aires) Tremacyllus impressus (61292 61299)
Messinian7.246 - 5.333Argentina (La Pampa) Tremacyllus impressus (141939 152067)
Messinian - Zanclean7.246 - 3.6Argentina (Mendoza) Tremacyllus impressus (200118)
Zanclean5.333 - 3.6Argentina (Buenos Aires) Tremacyllus impressus (191776)
Montehermosan5.0 - 3.8Argentina (Buenos Aires) Tremacyllus impressus (152081 152084 152085 152087 152088 198863)
Chapadmalalan4.0 - 3.0Argentina (Córdoba) Tremacyllus impressus (202212)
Chapadmalalan4.0 - 3.0Argentina (San Luis) Tremacyllus impressus (152073)
Late/Upper Pliocene3.6 - 2.588Argentina (Cordoba) Tremacyllus impressus (191133)
Piacenzian3.6 - 2.588Argentina (Córdoba) Tremacyllus impressus (225604)
Lujanian0.781 - 0.012Argentina (Buenos Aires) Tremacyllus impressus (202096)