| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Megatherium tarijense
Taxonomy
Megatherium tarijense was named by Gervais and Ameghino (1880) [Holotype, a nearly complete left calcaneum of an adult individual, missing small portions anteriorly
and posteriorly]. It is not extant. Its type specimen is MNHN P TAR 1269.
Sister species lacking formal opinion data
Synonyms
|
Synonymy list
| Year | Name and author |
|---|---|
| 1880 | Megatherium tarijense Gervais and Ameghino |
| 1888 | Megatherium filholi Moreno |
| 1902 | Megatherium tarijense Ameghino |
| 2006 | Megatherium tarijense Pujos |
| 2009 | Megatherium tarijense De Iuliis et al. |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Megatherium tarijense Gervais and Ameghino 1880
show all | hide all
Invalid names: Megatherium filholi Moreno 1888 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. De Iuliis et al. 2009 | Diagnosis (modified from De Iuliis, 1996)—Medium-sized
megatheriine, smaller than M. (M.) americanum, M. (P.) celendinense Pujos, 2006, E. laurillardi, and E. eomigrans De Iuliis and Cartelle, 1999 but with linear dimensions overlapping the lower end of ranges of these species. Similar in size to M. (P.) medinae, M. (P.) urbinai Pujos and Salas, 2004 and M. (P.) sundti, and larger than M. (M.) altiplanicum. Skull elongated and relatively narrow, with prominent postorbital processes and concave lateral walls. Dorsal skull profile nearly linear, but gently raised centrally as a dome, approximately intermediate between that of M. (P.) sundti and M. (P.) medinae. Premaxillae quadrangular; robust but less so and shorter than in M. (M.) americanum; fused to each other and to maxillae with age. Hypsodonty approximately intermediate between that of M. (M.) americanum and E. laurillardi. Lower orbital margin approximately level with the alveolar plane. Ventral bulge of dentary— as well as position of angular process—approximately intermediate between that of M. (M.) americanum and E. laurillardi. Clavicle elongated, bearing an abrupt angle at the junction of its sternal and acromial parts. Humeral ectepicondylar notch and lateral surface of humerus proximal to the notch much reduced. Deltopectoral crest weakly developed, resembling that of M. nazarrei(Kraglievich, 1925) and M. (P.) celendinense; reduced compared to that of M. (M.) americanum and M. (P.) sundti (unknown in M. (P.) medinae), and Eremotherium laurillardi and E. eomigrans. Pelvic girdle slightly more elongated than in M. (M.) americanum, with iliac wings less prominently flared laterally. Femur relatively gracile; medial and lateral margins less markedly concave compared to M. (M.) americanum and M. (P.) sundti, resembling that of M. (P.) medinae and Eremotherium species; patellar trochlea extended medially, more similar to that of M. (P.) medinae than M. (M.) americanum. Tibia-fibula fused distally, as in M. (M.) americanum, the only other megatheriine for which this condition is known. Position of navicular facet of astragalus approximately intermediate between that of M. (M.) americanum and E. laurillardi. |