Ruben Andrade Flores

Museo Nacional de Historia Natural de La Paz, Bolivia, La Paz · Paleontología

We describe the new frog Telmatobius achachila sp. nov. from the late Middle to earliest Late Miocene of Achiri, based on a partial skeleton found at 3960 m above sealevel in the Bolivian Altiplano. This skeleton, attributed to a male adult, constitutes the first documented fossil record of the speciose living genus Telmatobius , endemic to the And...

A palynological assemblage including the extinct araucarian dispersed pollen, Cyclusphaera scabrata, was analysed from the Achiri locality, Bolivian Altiplano. The fossil-yielding locality of Achiri is located in the Pacajes Province, La Paz Department, in the northwestern Altiplano, Bolivia. The Achiri locality is very well known by the fossil ver...

New remains of a relatively plesiomorphic nothrotheriid sloth have been recovered from upper Miocene- aged deposits near the village of Achiri in the Altiplano of Bolivia. The new specimens appear allied to other middle and late Miocene remains from Argentina and Bolivia that have been assigned to the pseudo-genus ‘Xyophorus’. ‘Xyophorus’ has not p...

A palynological assemblage including the extinct araucarian dispersed pollen, Cyclusphaera scabrata, was analysed from the Achiri locality, Bolivian Altiplano. The fossil-yielding locality of Achiri is located in the Pacajes Province, La Paz Department, in the northwestern Altiplano, Bolivia. The Achiri locality is very well known by the fossil ver...

La presente contribución tiene por objeto ampliar la distribución de yacimientos paleontológicos para el Valle de La Paz. La recolección del material estudiado proviene de la quebrada Humapalca, donde se han detectado numerosos niveles fosilíferos que se detallarán en el presente trabajo. Desde la perspectiva geológica el material estudiado provien...

Extinct terrestrial sloths are common elements of the late Cenozoic South American fossil record. Among them, Mylodontinae species were particularly abundant in the Americas throughout the Pleistocene epoch, and their anatomy is relatively well known. In contrast, less information is available from the Neogene record and particularly from localitie...

Extinct scelidotheriine sloths are among the most peculiar fossil mammals from South America. In recent decades, the external cranial anatomy of Pleistocene scelidotheres such as Scelidotherium, Catonyx, and Valgipes has been the subject of numerous studies, but their endocranial anatomy remains almost completely unknown. Today, computed tomographi...

We indicate the awesome and unusual pathologies of a mesotherid. We study the sequencial pathologies affection of the masticatory apparatus (acording his premolar and molar oclusal morphology). We infer according the craniomandibular pathological (anagenesis m1, m2), and other poscranial (exostoses) a lower predator ratio presence in the Late Mioce...

The Altiplano formed a broad Cenozoic inverted sedimentary basin (> 200 km wide) with up to 8 km of fluvio-lacustrine filling in various sub-basins. This work is focused on the Corque basin which recorded evolution of the central Altiplano and Neotropical terrestrial mammalian assemblages during the late Neogene. Indeed, this area is inferred to ha...

Tardigrade xenarthrans are today represented only by the two tree sloth genera Bradypus and Choloepus, which inhabit the Neotropical rainforests and are characterized by their slowness and suspensory locomotion. Sloths havebeen recognized in South America since the early Oligocene. This monophyletic group is represented by five clades traditionally...

The locality of Pomata-Ayte (Oruro department) was first reported by Hoffstetter and colleagues at the end of the 1970s and partially exploited by St-André in the 1990s. New collects have allowed recovering a diverse mammalian assemblage dated between 5.97 ± 0.4 My and 5.42 ± 0.6 My (Montehermosan SALMA, Mio-Pliocene transition). Among the taxa are...