Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Isotemnidae

Mammalia - Notoungulata - Isotemnidae

Synonyms
Synonymy list
YearName and author
1897Isotemnidae Ameghino p. 479
1902Interhippus deflexus Ameghino p. 13
1902Thomashuxleya principialis Ameghino p. 25
1902Colhuelia Roth p. 254
1902Colhuelia fruhi Roth p. 254
1902Lafkenia Roth p. 254
1902Lafkenia schmidti Roth p. 254
1902Lafkenia sulcifera Roth p. 254
1902Colhuapia Roth p. 255
1902Colhuapia rosei Roth p. 255
1903Pehuenia magna Roth p. 145
1903Trigonolophodon modicus Roth p. 147
1903Eurystephanodon crassatus Roth p. 151
1904Pehuenia magna Roth p. 145
1904Trigonolophodon modicus Roth p. 147
1910Isotemnidae Gregory p. 466
1934Isotemnidae Simpson
1935Isotemnidae Simpson p. 15
1956Isotemnidae McKenna p. 736
1967Isotemnidae Simpson
1970Isotemnidae Simpson
1982Isotemnidae Vucetich and Bond

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
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
AfrotheriaStanhope et al. 1998
Paenungulatomorpha
PaenungulataSimpson 1945
Sudamericungulata
orderNotoungulata
suborderToxodontiaAmeghino 1887
familyIsotemnidae
familyIsotemnidae

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.

Fm. †Isotemnidae Ameghino 1897
show all | hide all
G. †Acoelohyrax Ameghino 1902
+
Acoelohyrax coronatus Ameghino 1902
Acoelohyrax sigma Ameghino 1901
Invalid names: Plexotemnus Ameghino 1904 [synonym]
G. †Anisotemnus Ameghino 1902
+
Anisotemnus distentus Ameghino 1901
+
Invalid names: Isotemnus lophiodontoides Ameghino 1901 [synonym]
Invalid names: Toxotemnus Ameghino 1904 [synonym]
G. †Calodontotherium Roth 1903
G. †Coelostylodon Simpson 1970
+
G. †Distylophorus Ameghino 1902
+
Invalid names: Stylophorus Roth 1902 [replaced]
G. †Isotemnus Ameghino 1897
+
Isotemnus ctalego Simpson 1935
Isotemnus haugi Roth 1902
Isotemnus latidens Ameghino 1901
+
Invalid names: Eochalicotherium crassidens Ameghino 1901 [synonym], Eochalicotherium robustum Ameghino 1901 [synonym], Isotemnus apicatus Ameghino 1901 [synonym], Isotemnus cuspidatus Ameghino 1901 [synonym], Isotemnus enecatus Ameghino 1901 [synonym]
Isotemnus primitivus Ameghino 1897
+
Invalid names: Amphitemnus nucleatus Ameghino 1904 [synonym], Amphitemnus transitorius Ameghino 1904 [synonym], Eochalicotherium cretaceum Ameghino 1901 [synonym], Isotemnus conspiquus Ameghino 1897 [synonym], Trimerostephanos angustus Ameghino 1897 [synonym]
Invalid names: Amphitemnus Ameghino 1904 [synonym], Dimerostephanos Ameghino 1902 [synonym], Eochalicotherium Ameghino 1901 [synonym], Isotemnus colhuehuapiensis Ameghino 1902 [nomen vanum], Lelfunia Roth 1902 [synonym], Prostylops Ameghino 1897 [synonym], Prostylops typus Ameghino 1897 [nomen dubium]
G. †Lophocoelus Ameghino 1904
+
Lophocoelus macrostomus Ameghino 1904
G. †Pampatemnus Vucetich and Bond 1982
+
Pampatemnus deuteros Vucetich and Bond 1982
Pampatemnus infernalis Vucetich and Bond 1982
G. †Pleurocoelodon Ameghino 1894
+
Pleurocoelodon cingulatus Ameghino 1894
Pleurocoelodon wingei Ameghino 1894
G. †Pleurostylodon Ameghino 1897
+
Pleurostylodon complanatus Ameghino 1902
+
Invalid names: Pleurostylodon irregularis Ameghino 1904 [synonym], Pleurostylodon neglectus Ameghino 1904 [synonym]
Pleurostylodon crassiramis Ameghino 1902
Pleurostylodon modicus Ameghino 1897
+
Invalid names: Anchistrum sulcosum Ameghino 1901 [synonym], Dialophus simus Ameghino 1901 [synonym], Dimerostephanos attritus Ameghino 1902 [synonym], Parastylops coelodus Ameghino 1897 [synonym], Paratemnus geminatus Ameghino 1904 [synonym], Pleurostylodon divisus Ameghino 1901 [synonym], Pleurostylodon limpidus Ameghino 1904 [synonym], Pleurostylodon obscurus Ameghino 1904 [synonym], Pleurostylodon plexus Ameghino 1901 [synonym], Pleurostylodon sinuosus Ameghino 1902 [synonym], Trimerostephanos biconus Ameghino 1897 [synonym], Tychostylops marculus Ameghino 1901 [synonym]
Pleurostylodon recticrista Ameghino 1904
Pleurostylodon similis Ameghino 1901
+
Invalid names: Coelostylops crassus Ameghino 1901 [synonym], Tychostylops simus Ameghino 1904 [synonym]
Invalid names: Anchistrum Ameghino 1901 [synonym], Coelostylops Ameghino 1901 [synonym], Dialophus Ameghino 1901 [synonym], Parastylops Ameghino 1897 [synonym], Paratemnus Ameghino 1904 [synonym], Pleurostylodon bifidus Ameghino 1904 [nomen dubium], Pleurostylodon notabilis Ameghino 1901 [nomen dubium], Porotemnus Ameghino 1902 [synonym], Tychostylops Ameghino 1901 [synonym]
G. †Rhyphodon Roth 1899
+
Rhyphodon lankesteri Roth 1899
+
Invalid names: Lemudeus proportionalis Roth 1904 [synonym], Pehuenia insigna Roth 1904 [synonym], Pehuenia wehrlii Roth 1902 [synonym], Setebos terribilis Roth 1902 [synonym]
Invalid names: Pehuenia Roth 1902 [synonym], Setebos Roth 1902 [synonym]
G. †Thomashuxleya Ameghino 1901
+
Thomashuxleya externa Ameghino 1901
+
Invalid names: Thomashuxleya artuata Ameghino 1901 [synonym]
Thomashuxleya rostrata Ameghino 1901
+
Invalid names: Thomashuxleya robusta Ameghino 1901 [synonym]
G. †Trimerostephanos Ameghino 1895
+
Trimerostephanos coalitus Ameghino 1901
Trimerostephanos coarctatus Ameghino 1901
Trimerostephanos scabrus Ameghino 1894
Trimerostephanos scalaris Ameghino 1897
Invalid names: Colhuapia Roth 1902 [nomen dubium], Colhuapia rosei Roth 1902 [nomen dubium], Colhuelia Roth 1902 [nomen dubium], Eurystephanodon crassatus Roth 1903 [nomen dubium], Interhippus deflexus Ameghino 1902 [nomen dubium], Lafkenia Roth 1902 [nomen dubium], Lafkenia schmidti Roth 1902 [nomen dubium], Lafkenia sulcifera Roth 1902 [nomen dubium], Pehuenia magna Roth 1904 [nomen dubium], Thomashuxleya principialis Ameghino 1902 [nomen dubium], Trigonolophodon modicus Roth 1904 [nomen dubium]
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, Carroll 1988, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009

Age range: base of the Ypresian to the top of the Early/Lower Oligocene or 56.00000 to 28.40000 Ma

Collections (57 total)


Time interval Ma Country or state Original ID and collection number
Riochican57.0 - 55.8Argentina (Chubut) Isotemnidae indet. (175728) Isotemnus ctalego, Isotemnidae indet. (14205) Isotemnus sp., Pleurostylodon sp., Isotemnus primitivus (13781)
Riochican - Mustersan57.0 - 42.0Argentina Pleurostylodon sp. (176460)
Ypresian56.0 - 47.8Argentina (Chubut) Isotemnus sp. (133040)
Eocene - Oligocene56.0 - 23.03Argentina (Chubut) Pleurostylodon sp. (38877)
Casamayoran55.8 - 48.0Argentina (Chubut) Isotemnus primitivus, Pleurostylodon modicus, Prostylops typus, Parastylops coelodus, Thomashuxleya rostrata, Thomashuxleya artuata, Thomashuxleya robusta, Thomashuxleya externa, Isotemnus cuspidatus, Pleurostylodon similis, Pleurostylodon plexus, Pleurostylodon notabilis, Eochalicotherium cretaceum, Acoelohyrax coronatus, Thomashuxleya principialis, Pleurostylodon sinuosus, Pleurostylodon complanatus, Pleurostylodon irregularis, Pleurostylodon limpidus, Pleurostylodon bifidus, Pleurostylodon neglectus (176285) Pleurostylodon obscurus (176283) Pleurostylodon sp. (176304) Pleurostylodon sp., Pleurostylodon similis (49899) Pleurostylodon sp., Thomashuxleya sp. (48176 175743) Thomashuxleya externa, Pleurostylodon similis (39295)
Early/Lower Eocene - Middle Eocene55.8 - 37.2Argentina (Chubut) Lelfunia haugi (175735)
Mustersan48.0 - 42.0Argentina (Chubut) Acoelohyrax indet. (175761) Distylophorus alouatinus (176287) Eurystephanodon angusticephalus (176317) Rhyphodon indet., Distylophorus alouatinus (176179) Rhyphodon lankesteri (176289) Rhyphodon lankesteri, Stylophorus alouatinus, Setebos terribilis, Pehuenia wehrlii, Pehuenia insigna, Lemudeus proportionalis, Lafkenia sulcifera, Lafkenia schmidti, Colhuelia fruhi, Colhuapia rosei, Trigonolophodon modicus, Pehuenia magna, Eurystephanodon crassatus (176290) Trimerostephanos coalitus, Trimerostephanos coarctatus, Trimerostephanos sigma (176286)
Lutetian47.8 - 41.3Argentina (Chubut) Isotemnus primitivus, Thomashuxleya externa, Pleurostylodon similis (44956 176170 176172) Isotemnus sp. (176059) Thomashuxleya externa, Anisotemnus distentus, Edvardotrouessartia sola (176165) Thomashuxleya externa, Pleurostylodon similis (176173 176174)
Lutetian47.8 - 41.3Argentina (Salta) Pampatemnus deuteros (175897) Pampatemnus infernalis (175865)
Lutetian - Bartonian47.8 - 38.0Argentina (Chubut) Isotemnus consummatus, Isotemnus primitivus, Thomashuxleya externa, Isotemnus lophiodontoides, Isotemnus enecatus, Isotemnus apicatus, Eochalicotherium crassidens, Eochalicotherium robustum, Coelostylops crassus, Anisotemnus distentus, Dialophus recticrista, Isotemnus latidens (176164)
Bartonian41.3 - 38.0Argentina (Santa Cruz) Isotemnus primitivus (176494)
Bartonian41.3 - 38.0Argentina (Jujuy) Isotemnidae indet. (176665)
Bartonian41.3 - 38.0Argentina (Chubut) Anisotemnus distentus (176167) Anisotemnus indet. (176177) Isotemnus primitivus (176188) Isotemnus primitivus, Pleurostylodon similis (49900) Pleurostylodon modicus (176178 176180 176181 176182 176184 176187 176191) Pleurostylodon modicus, Anisolambda latidens, Thomashuxleya rostrata (176163) Pleurostylodon modicus, Thomashuxleya rostrata (176185) Pleurostylodon sp., Pleurostylodon modicus, Isotemnus distentus, Dialophus simus (176168) Plexotemnus complicatissimus, Coelostylodon florentinoameghinoi, Isotemnus primitivus, Isotemnus conspiquus, Trimerostephanos angustus, Trimerostephanos biconus, Pleurostylodon modicus, Anchistrum sulcosum, Tychostylops marculus, Thomashuxleya rostrata, Pleurostylodon divisus, Anisotemnus distentus, Porotemnus crassiramis, Dimerostephanos colhuehuapensis, Dimerostephanos attritus, Amphitemnus nucleatus, Amphitemnus transitorius, Paratemnus geminatus, Tychostylops simus, Acoelodus oppositus (13779) Thomashuxleya rostrata (176176 176190)
Priabonian38.0 - 33.9Argentina (Catamarca) I. species indet. 2, I. species indet. 3, Isotemnidae indet. (41608)
Tinguirirican36.0 - 29.0Argentina (Chubut) Pleurostylodon indet., Anisotemnus distentus (176196)
Early/Lower Oligocene33.9 - 28.4Chile Rhyphodon sp. (38072)
Early/Lower Oligocene33.9 - 28.4Argentina (Chubut) Interhippus deflexus (38611) Isotemnidae indet. (186572)
Deseadan29.0 - 21.0Argentina (Santa Cruz) Isotemnidae indet. (176269) Trimerostephanos sp. (50074)