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Reigitherium bunodontum
Taxonomy
Reigitherium bunodonta was named by Bonaparte (1990). Its type specimen is MACN-RN 175, a tooth (lower right m2), and it is a 3D body fossil. Its type locality is Cerrito del Mamifero, Los Alamitos vertebrates, middle section, which is in a Campanian/Maastrichtian lacustrine - large lime mudstone in the Los Alamitos Formation of Argentina. It is the type species of Reigitherium.
It was corrected as Reigitherium bunodontum by Pascual et al. (2000), Kielan-Jaworowska et al. (2004) and Rougier et al. (2021).
It was corrected as Reigitherium bunodontum by Pascual et al. (2000), Kielan-Jaworowska et al. (2004) and Rougier et al. (2021).
Synonymy list
| Year | Name and author |
|---|---|
| 1990 | Reigitherium bunodonta Bonaparte p. 76 fig. 11 |
| 2000 | Reigitherium bunodontum Pascual et al. p. 402 |
| 2002 | Reigitherium bunodonta Bonaparte p. 360 |
| 2004 | Reigitherium bunodontum Kielan-Jaworowska et al. pp. 197, 200-201 |
| 2021 | Reigitherium bunodontum Rougier 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.
†Reigitherium bunodontum Bonaparte 1990
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Pascual et al. 2000 | Reigitherium bunodontum differs from the other docodont species, in that the crowns of the lower cheekteeth are laterally enlarged because the lingual cingular cusps became incorporated to a notably expanded, discrete masticatory surface. The lower last premolar is, at least, three-rooted. From pm4 to at least m2 the shape changes progressively from rectangular, with the longer diameter antero-posteriorly oriented (pm4 and m1), to almost subquadrate, but being, at the base of the crown, wider transversely than antero-posteriorly (m2), particularly because new basic buccal cusps are added. The dentary is stronger, without a postdentary groove, at least absent below m1 and m2 |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum, uc = unranked clade | |||||
| References: Hopson 1973, Hendy et al. 2009, Luo et al. 2003, Carroll 1988 | |||||
Age range: base of the Maastrichtian to the top of the Early/Lower Maastrichtian or 72.10000 to 66.00000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian - Early/Lower Maastrichtian | Argentina (Río Negro) | Reigitherium bunodonta (type locality: 231686) | |
| Maastrichtian | Argentina (Chubut) | Reigitherium bunodontum (36447 121187 193738) |