A singular Hegetotheriinae (Notoungulata, Typotheria) from the late Oligocene-Early Miocene of the Subandean Region of Bolivia
Geological studies in the northern sector of the Chaco foreland Basin, Bolivia, yielded new fossils coming from late Oligocene-late Miocene of the Petaca Formation. Few fossil mammals were known from the Subandean Region of Bolivia. We report a partially complete mandible of a hegetotheriid Hegetoth...
| Autores principales: | , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Español |
| Publicado: |
2021
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/123681 |
| Aporte de: |
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I19-R120-10915-123681 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Español |
| topic |
Geología Notoungulata Hegetotheriidae Petaca Formation Late Oligocene-early Miocene Bolivia |
| spellingShingle |
Geología Notoungulata Hegetotheriidae Petaca Formation Late Oligocene-early Miocene Bolivia Reguero, Marcelo Alfredo Tineo, David Eric Bona, Paula Pérez, Leandro Martín Vergani, Gustavo Ruiz, Gloria González Poiré, Daniel Gustavo A singular Hegetotheriinae (Notoungulata, Typotheria) from the late Oligocene-Early Miocene of the Subandean Region of Bolivia |
| topic_facet |
Geología Notoungulata Hegetotheriidae Petaca Formation Late Oligocene-early Miocene Bolivia |
| description |
Geological studies in the northern sector of the Chaco foreland Basin, Bolivia, yielded new fossils coming from late Oligocene-late Miocene of the Petaca Formation. Few fossil mammals were known from the Subandean Region of Bolivia. We report a partially complete mandible of a hegetotheriid Hegetotheriinae (Notoungulata, Typotheria) from Abapo (Rio Grande River). The specimen (YPFB-LIT-PAL-005) is very close in size and dental morphology to the late Oligocene (Deseadan South American Land Mammal Age, SALMA) — Santacrucian (early Miocene) Prohegetotherium schiaffinoi (Kraglievich 1932) from Fray Bentos (Uruguay and Argentina), Salla (Bolivia), Divisadero Largo-Potrerillos and Quebrada Fiera (Argentina). However, mandibular characteristics, as the shape with a marked change in height along its length, increasing towards the back, a prominent masseteric crest, a deep mandibular groove, and a remarkable thickening of the ventral rim of the mandible, indicate differences between this specimen and Prohegetotherium schiaffinoi and the other Hegetotheriinae. The affinity of YPFB-LIT-PAL-005 with P. schiaffinoi suggests a late Oligocene to early Miocene for the upper bearing horizon of the Petaca Formation (in Abapo), an older age than previously assigned to the top of this unit (late Miocene), and confirms the taxon distribution between ∼ 36 ° to ∼ 17 ° south latitude. |
| format |
Articulo Articulo |
| author |
Reguero, Marcelo Alfredo Tineo, David Eric Bona, Paula Pérez, Leandro Martín Vergani, Gustavo Ruiz, Gloria González Poiré, Daniel Gustavo |
| author_facet |
Reguero, Marcelo Alfredo Tineo, David Eric Bona, Paula Pérez, Leandro Martín Vergani, Gustavo Ruiz, Gloria González Poiré, Daniel Gustavo |
| author_sort |
Reguero, Marcelo Alfredo |
| title |
A singular Hegetotheriinae (Notoungulata, Typotheria) from the late Oligocene-Early Miocene of the Subandean Region of Bolivia |
| title_short |
A singular Hegetotheriinae (Notoungulata, Typotheria) from the late Oligocene-Early Miocene of the Subandean Region of Bolivia |
| title_full |
A singular Hegetotheriinae (Notoungulata, Typotheria) from the late Oligocene-Early Miocene of the Subandean Region of Bolivia |
| title_fullStr |
A singular Hegetotheriinae (Notoungulata, Typotheria) from the late Oligocene-Early Miocene of the Subandean Region of Bolivia |
| title_full_unstemmed |
A singular Hegetotheriinae (Notoungulata, Typotheria) from the late Oligocene-Early Miocene of the Subandean Region of Bolivia |
| title_sort |
singular hegetotheriinae (notoungulata, typotheria) from the late oligocene-early miocene of the subandean region of bolivia |
| publishDate |
2021 |
| url |
http://sedici.unlp.edu.ar/handle/10915/123681 |
| work_keys_str_mv |
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Repositorios |
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