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Xenastrapotherium kraglievichi
Taxonomy
Xenastrapotherium kraglievichi was named by Cabrera (1929) [Very similar to Xenastrapotherium christi but smaller. The external vertical depression in m2 and m3 is placed anteriorly to the division between the two roots. The lower molar line at crown level is 135 mm, at the alveoli level is 140 mm at alveoli level. Lower molar sizes: m1, 31 mm length 17.4 mm width; m2, 48 mm length , 19 mm width; m3, 51.8 length, 15.5 mm width ]. Its type specimen is MLP 112-96, a mandible (Left mandible with m1 to m3), and it is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1929 | Xenastrapotherium kraglievichi Cabrera |
| 1984 | Xenastrapotherium kraglievichi Johnson p. 26 fig. 7 |
| 1997 | Xenastrapotherium kraglievichi 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.
†Xenastrapotherium kraglievichi Cabrera 1929
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. Johnson 1984 | Differs from only known specimen of Xenastrapotherium christi in the form of P4, which, in X. kraglievichi is mesiodistally aligned and more trenchant than in X. christi, and by the more anterior location of the vertical external depression of the lower molars in X. kraglievichi. | |
| S. E. Johnson and R. H. Madden 1997 | Xenastrapotherium kraglievich differs from X. christiin lacking or having only a very weak remnant of the hypoflexid depression possitioned opposite the paraflexid on m2 and m3 (in X. christi the weak m2 and m3 hypoflexid is possitioned opposite the metalophid) and having p4 implanted more in line with the molar row. Xenastrapotherium kraglievichi differs from X. aequatorialis in lacking trace of the posterior pillar and in having a much-reduced lower molar lingual cingulum. Xenastrapotherium kraglievichi differs from all other known species of the genus by having significantly smaller cheek teeth. |
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| Lower canine diameter | 6 | 34.5 | 23.0 | 49.0 | 36.5 | 10.2 | |
| Mandible height | 2 | 71.8 | 63.6 | 81.0 | 72.3 | 12.3 | |
| Upper canine diameter | 6 | 32.6 | 23.0 | 50.0 | 32.0 | 9.84 |
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| Source: g = genus, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Carroll 1988, Johnson and Madden 1997, Hendy et al. 2009, Ji et al. 2002 | |||||
Age range: Laventan or 13.80000 to 11.00000 Ma
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Laventan | Colombia (Huila) | Xenastrapotherium kraglievichi (133693 136211 141256 143787 143789 185892 187114 187115 187718 187965 188024 188025 188026 188027) |