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Isotemnus
Taxonomy
Isotemnus was named by Ameghino (1897). Its type is Isotemnus primitivus.
It was assigned to Isotemnidae by Ameghino (1897), Simpson (1935), Simpson (1967) and Carroll (1988).
It was assigned to Isotemnidae by Ameghino (1897), Simpson (1935), Simpson (1967) and Carroll (1988).
Species
I. colhuehuapiensis, I. ctalego, I. haugi, I. latidens (syn. I. cuspidatus, I. enecatus, Eochalicotherium crassidens, I. apicatus, Eochalicotherium robustum), I. primitivus (syn. I. conspiquus, Amphitemnus transitorius, Amphitemnus nucleatus, Eochalicotherium cretaceum, Trimerostephanos angustus) (type species), Prostylops typus
Species lacking formal opinion data
Synonyms
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Synonymy list
Year | Name and author |
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1897 | Isotemnus Ameghino p. 480 |
1897 | Prostylops Ameghino p. 486 |
1897 | Prostylops typus Ameghino p. 486 |
1901 | Eochalicotherium Ameghino p. 420 |
1902 | Dimerostephanos Ameghino p. 30 |
1902 | Dimerostephanos colhuehuapensis Ameghino p. 30 |
1902 | Lelfunia Roth p. 255 |
1904 | Amphitemnus Ameghino p. 86 |
1935 | Isotemnus Simpson p. 15 |
1967 | Isotemnus Simpson |
1988 | Isotemnus Carroll |
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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.
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]
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, Hendy et al. 2009, Ji et al. 2002, Carroll 1988, Lillegraven 1979 |
Age range: base of the Casamayoran to the top of the Bartonian or 56.00000 to 38.00000 Ma
Collections (15 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Riochican | Argentina (Chubut) | I. ctalego, Isotemnidae indet. (14205) I. sp., I. primitivus (13781) | |
Casamayoran | Argentina (Chubut) | I. primitivus, Prostylops typus, I. cuspidatus, Eochalicotherium cretaceum (176285) | |
Ypresian | Argentina (Chubut) | I. sp. (133040) | |
Early/Lower Eocene - Middle Eocene | Argentina (Chubut) | Lelfunia haugi (175735) | |
Lutetian | Argentina (Chubut) | I. primitivus (44956 176170 176172) I. sp. (176059) | |
Lutetian - Bartonian | Argentina (Chubut) | I. consummatus, I. primitivus, I. enecatus, I. apicatus, Eochalicotherium crassidens, Eochalicotherium robustum, I. latidens (176164) | |
Bartonian | Argentina (Chubut) | Anisolambda latidens (176163) I. primitivus (49900 176188) I. primitivus, I. conspiquus, Trimerostephanos angustus, Dimerostephanos colhuehuapensis, Amphitemnus nucleatus, Amphitemnus transitorius (13779) | |
Bartonian | Argentina (Santa Cruz) | I. primitivus (176494) |