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Isotemnidae
Taxonomy
Isotemnidae was named by Ameghino (1897).
It was assigned to Ancylopoda by Ameghino (1897); to Astrapotheria by Gregory (1910); to Entelonychia by Simpson (1934) and Simpson (1935); to Toxodontia by McKenna (1956) and Simpson (1967); to Notoungulata by Simpson (1970); and to Toxodonta by Vucetich and Bond (1982).
It was assigned to Ancylopoda by Ameghino (1897); to Astrapotheria by Gregory (1910); to Entelonychia by Simpson (1934) and Simpson (1935); to Toxodontia by McKenna (1956) and Simpson (1967); to Notoungulata by Simpson (1970); and to Toxodonta by Vucetich and Bond (1982).
Subtaxa
Acoelohyrax (syn. Plexotemnus), Anisotemnus (syn. Toxotemnus), Calodontotherium, Coelostylodon, Colhuapia, Colhuapia rosei, Colhuelia, Distylophorus (syn. Stylophorus), Eurystephanodon crassatus, Interhippus deflexus, Isotemnus (syn. Lelfunia, Dimerostephanos, Amphitemnus, Eochalicotherium, Prostylops), Lafkenia, Lafkenia schmidti, Lafkenia sulcifera, Lophocoelus, Pampatemnus, Pehuenia magna, Pelurocoelodon, Pleurocoelodon, Pleurostylodon (syn. Coelostylops, Paratemnus, Dialophus, Tychostylops, Anchistrum, Porotemnus, Parastylops), Rhyphodon (syn. Pehuenia, Setebos), Thomashuxleya, Thomashuxleya principialis, Trigonolophodon modicus, Trimerostephanos
Synonyms
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Synonymy list
Year | Name and author |
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1897 | Isotemnidae Ameghino p. 479 |
1902 | Interhippus deflexus Ameghino p. 13 |
1902 | Thomashuxleya principialis Ameghino p. 25 |
1902 | Colhuelia Roth p. 254 |
1902 | Colhuelia fruhi Roth p. 254 |
1902 | Lafkenia Roth p. 254 |
1902 | Lafkenia schmidti Roth p. 254 |
1902 | Lafkenia sulcifera Roth p. 254 |
1902 | Colhuapia Roth p. 255 |
1902 | Colhuapia rosei Roth p. 255 |
1903 | Pehuenia magna Roth p. 145 |
1903 | Trigonolophodon modicus Roth p. 147 |
1903 | Eurystephanodon crassatus Roth p. 151 |
1904 | Pehuenia magna Roth p. 145 |
1904 | Trigonolophodon modicus Roth p. 147 |
1910 | Isotemnidae Gregory p. 466 |
1934 | Isotemnidae Simpson |
1935 | Isotemnidae Simpson p. 15 |
1956 | Isotemnidae McKenna p. 736 |
1967 | Isotemnidae Simpson |
1970 | Isotemnidae Simpson |
1982 | Isotemnidae Vucetich and Bond |
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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
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G. †Acoelohyrax Ameghino 1902
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†Acoelohyrax complicatissimus Ameghino 1904
†Acoelohyrax coronatus Ameghino 1902
†Acoelohyrax sigma Ameghino 1901
Invalid names: Plexotemnus Ameghino 1904 [synonym]
G. †Anisotemnus Ameghino 1902
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†Anisotemnus distentus Ameghino 1901
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Invalid names: Isotemnus lophiodontoides Ameghino 1901 [synonym]
Invalid names: Toxotemnus Ameghino 1904 [synonym]
G. †Calodontotherium Roth 1903
G. †Coelostylodon Simpson 1970
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†Coelostylodon caroloameghinoi Simpson 1970
†Coelostylodon florentinoameghinoi Simpson 1970
G. †Distylophorus Ameghino 1902
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†Distylophorus alouatinus Roth 1902
Invalid names: Stylophorus Roth 1902 [replaced]
G. †Isotemnus Ameghino 1897
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†Isotemnus ctalego Simpson 1935
†Isotemnus haugi Roth 1902
†Isotemnus latidens Ameghino 1901
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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
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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. †Pampatemnus Vucetich and Bond 1982
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†Pampatemnus deuteros Vucetich and Bond 1982
†Pampatemnus infernalis Vucetich and Bond 1982
G. †Pelurocoelodon
G. †Pleurocoelodon Ameghino 1894
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†Pleurocoelodon cingulatus Ameghino 1894
†Pleurocoelodon wingei Ameghino 1894
G. †Pleurostylodon Ameghino 1897
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†Pleurostylodon complanatus Ameghino 1902
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Invalid names: Pleurostylodon irregularis Ameghino 1904 [synonym], Pleurostylodon neglectus Ameghino 1904 [synonym]
†Pleurostylodon crassiramis Ameghino 1902
†Pleurostylodon modicus Ameghino 1897
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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
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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
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†Rhyphodon angusticephalus Roth 1904
†Rhyphodon lankesteri Roth 1899
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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
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†Thomashuxleya rostrata Ameghino 1901
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Invalid names: Thomashuxleya robusta Ameghino 1901 [synonym]
G. †Trimerostephanos Ameghino 1895
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†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
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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 |
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Riochican | Argentina (Chubut) | Isotemnidae indet. (175728) Isotemnus ctalego, Isotemnidae indet. (14205) Isotemnus sp., Pleurostylodon sp., Isotemnus primitivus (13781) | |
Riochican - Mustersan | Argentina | Pleurostylodon sp. (176460) | |
Ypresian | Argentina (Chubut) | Isotemnus sp. (133040) | |
Eocene - Oligocene | Argentina (Chubut) | Pleurostylodon sp. (38877) | |
Casamayoran | Argentina (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 Eocene | Argentina (Chubut) | Lelfunia haugi (175735) | |
Mustersan | Argentina (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) | |
Lutetian | Argentina (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) | |
Lutetian | Argentina (Salta) | Pampatemnus deuteros (175897) Pampatemnus infernalis (175865) | |
Lutetian - Bartonian | Argentina (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) | |
Bartonian | Argentina (Santa Cruz) | Isotemnus primitivus (176494) | |
Bartonian | Argentina (Jujuy) | Isotemnidae indet. (176665) | |
Bartonian | Argentina (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) | |
Priabonian | Argentina (Catamarca) | I. species indet. 2, I. species indet. 3, Isotemnidae indet. (41608) | |
Tinguirirican | Argentina (Chubut) | Pleurostylodon indet., Anisotemnus distentus (176196) | |
Early/Lower Oligocene | Chile | Rhyphodon sp. (38072) | |
Early/Lower Oligocene | Argentina (Chubut) | Interhippus deflexus (38611) Isotemnidae indet. (186572) | |
Deseadan | Argentina (Santa Cruz) | Isotemnidae indet. (176269) Trimerostephanos sp. (50074) |