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Xenastrapotherium
Taxonomy
Xenastrapotherium was named by Kraglievich (1928). Its type is Xenastrapotherium christi.
It was assigned to Astrapotheriidae by Carroll (1988); and to Uruguaytheriinae by Johnson and Madden (1997).
It was assigned to Astrapotheriidae by Carroll (1988); and to Uruguaytheriinae by Johnson and Madden (1997).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1928 | Xenastrapotherium Kraglievich |
| 1976 | Synastrapotherium Paula Couto |
| 1988 | Xenastrapotherium Carroll |
| 1997 | Xenastrapotherium Johnson and Madden |
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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. †Xenastrapotherium Kraglievich 1928
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†Xenastrapotherium aequatorialis Johnson and Madden 1997
†Xenastrapotherium amazonense Paula Couto 1976
†Xenastrapotherium chaparralensis Johnson and Madden 1997
†Xenastrapotherium christi Stehlin 1928
†Xenastrapotherium kraglievichi Cabrera 1929
Invalid names: Synastrapotherium Paula Couto 1976 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. E. Johnson and R. H. Madden 1997 | Xenastrapotherium differs from all other known astrapotheres by possessing two lower incisors on each side and an M3 posterolingual cingulum that joins the protoloph with the metaloph and closes the median valley lingually. In addition to these characters, Xenastrapotherium differs from all other known uruguaytheriine astrapotheres in possessing lower canine tusks with pronounced longitudinal curvature and anterorinferior and posteroinferior grooves in cross section; shallow lower molar metaflexids bounded by a variably developed anterolingual cingulum; and mesiodistally narow and rounded metalophids. |