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Calchaquitherium mixtum
Taxonomy
Calchaquitherium mixtum was named by Nasif et al. (2000). Its type specimen is PVL 4794, a mandible (Nearly complete mandible with left and right i1–i3 and p1–m3; left I1 and right M3 of an adult individual.), and it is a 3D body fossil. Its type locality is El Cajón Valley, which is in a Huayquerian floodplain sandstone/siltstone in the El Morterito Formation of Argentina. It is the type species of Calchaquitherium.
Synonymy list
| Year | Name and author |
|---|---|
| 2000 | Calchaquitherium mixtum Nasif et al. |
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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.
†Calchaquitherium mixtum Nasif et al. 2000
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| N. L. Nasif et al. 2000 | Mandible with high coronoid apophysis, clearly surpassing the level of the condyle; post coronoid concavity deeper than in Mixotoxodon larensis van Frank; coronoid apophyses convergent as in Posnanskytherium Liendo; symphysis with a median labial keel, more proximally placed than in Xotodon species; symphysis and lower incisors more vertically placed than in Mixotoxodon larensis and similar to Xotodon species; I1 section kidney-shaped with a median lingual groove, as in Adinotherium ovinum (Owen) Ameghino; p2–p4 with smooth labial groove as in Xotodon species, Trigodon gaudryi Ameghino, and Hoffstetterius imperator Saint-Andre ́; meta-entoconid fold of m1–m2 marked as in Xotodon species and different to Mixotoxodon larensis; meta-entoconid fold of m3 smooth, as in Hoffstetterius imperator; length of p2–p4 less than 50% of the molar length as in Trigodon gaudryi, Palyei- dodon obtusum Roth, and Hoffstetterius imperator. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Carroll 1988, Hendy et al. 2009, MacFadden et al. 1996, Lillegraven 1979, Ji et al. 2002 | |||||
Age range: Huayquerian or 8.00000 to 5.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Huayquerian | Argentina (Catamarca) | Calchaquitherium mixtum (type locality: 141369) |