Systematic and Taxonomic Revision of the Pleistocene Ground Sloth Megatherium (Pseudomegatherium) Tarijense (Xenarthra: Megatheriidae)

  title={Systematic and Taxonomic Revision of the Pleistocene Ground Sloth Megatherium (Pseudomegatherium) Tarijense (Xenarthra: Megatheriidae)},
  author={Gerardo De Iuliis and François Pujos and Giuseppe Tito},
ABSTRACT Our understanding of South American megatheriine ground sloths was traditionally based largely on abundant material from Brazil and Argentina, mainly because megatheriine remains from elsewhere in South America were scant and poorly preserved. In recent years, however, the recovery and description of remains from northwestern South America has led to the recognition of several new taxa and the validation of species originally based on sparse remains. Falling in the latter group is… 

Implication of the presence of Megathericulus (Xenarthra: Tardigrada: Megatheriidae) in the Laventan of Peruvian Amazonia

The genus Eomegatherium Kraglievich is restricted to the Huayquerian SALMA of Argentina and represented by a single species, E. nanum Burmeister.

A new nothrotheriid xenarthran from the early Pliocene of Pomata‐Ayte (Bolivia): new insights into the caniniform–molariform transition in sloths

A cladistic assessment of the available dental and postcranial evidence indicates that Aymaratherium is either sister taxon to Mionothropus or sister to the clade Nothrotheriini within Nothotheriinae, which further support the monophyly of both the Noth rotheriINAe and theNothroTheriini, as suggested previously by several authors.

New Remains of Megathericulus patagonicus Ameghino, 1904 (Xenarthra, Tardigrada) from the Serravallian (Middle Miocene) of Bolivia; Chronological and Biogeographical Implications

Preise geographic and stratigraphic data exist for the described remains, which are closely associated with a tuff dated at 12.2–12.5 Ma (Serravallian, middle Miocene), making it the first accurately dated specimen referred to Megathericulus patagonicus Ameghino, 1904.

Evolutive Implications of Megathericulus patagonicus (Xenarthra, Megatheriinae) from the Miocene of Patagonia Argentina

A partial dentary with teeth and an astragalus referred to the ancient megatheriine Megathericulus patagonicus Ameghino, 1904 recovered from the Collón Curá Formation at Chubut Province, Argentina supports that the Quebrada Honda fauna as a whole is more similar to the asynchronous high-latitude faunas from Patagonia than to contemporary La Venta Fauna (Colombia).

A review of the Quaternary Scelidotheriinae (Mammalia, Xenarthra, Tardigrada) from the Tarija-Padcaya basin, Bolivia.

A revision of the remains assigned to Scelidotheriinae from the Tarija-Padcaya basin is accomplished, and some biostratigraphic and geographic implications are discussed.

Anisodontherium from the Late Miocene of North-Western Argentina

The fossil record of Megatheriinae (Tardigrada, Megatheriidae) in Argentina extends from the Colloncuran (Middle Miocene of Patagonia) to the Lujanian (Late Pleistocene—Early Holocene of the Pampean

Additions to the knowledge of the ground sloth Catonyx tarijensis (Xenarthra, Pilosa) in the Pleistocene of Argentina

Quaternary Scelidotheriinae (Mammalia, Xenarthra, Mylodontidae) are represented by three genera: Scelidotherium Owen, Valgipes Gervais, and Catonyx Ameghino. The genus Catonyx includes three species

A New View on the Late Pleistocene Lithic Remains from Pikimachay Cave, South Central Peru

Between 1966 and 1972, Richard MacNeish led the “Ayacucho Archaeological-Botanical Project” in the Ayacucho Basin, south-central Peru. Over the last decade, we reappraised the lithics recovered in




The higher crural indices of megatheriines and particularly of Pyramiodontherium, compared to those of mylodontids, suggest greater agility.

New Remains of Megathericulus patagonicus Ameghino, 1904 (Xenarthra, Megatheriidae): Information on Primitive Features of Megatheriines

Megathericulus patagonicus is the earliest certain megatheriine and the new remains provide information on primitive megatherIine features, including that lower molariforms are mesiodistally compressed.

On the taxonomic status of Megatherium sundti Philippi, 1893 (Mammalia: Xenarthra: Megatheriidae)

Abstract. Remains of a medium-sized megathere from Pleistocene deposits near Ulloma, Bolivia, suggest that the commonly accepted synonymy of Megatheriumsundti Philippi, 1893 with Megatheriummedinae

A new species of Megatherium (Mammalia: Xenarthra: Megatheriidae) from the Pleistocene of Sacaco and Tres Ventanas, Peru

M. urbinai is one of the smallest Megatherium species known along with M. tarijense and M. altiplanicum and is phylogenetically close to other Andean megatheriines and is less specialised than M. americanum.


Abstract:  A new Pleistocene megatheriine, Megatherium celendinense sp. nov., is reported from a cave in the north of the Peruvian Andes. It is the largest Andean Megatheriinae and is characterized

New remains of Eremotherium laurillardi (Lund, 1842) (Megatheriidae, Xenarthra) from the coastal region of Ecuador

  • G. Tito
  • Geography, Environmental Science
  • 2008

Relationships of the Megatheriinae, Nothrotheriinae, and Planopsinae: some skeletal characteristics and their importance for phylogeny

The Y–shaped premaxillae of some Nothrotheriinae sensu lato may be a synapomorphy of the Plio-Pleistocene and some Santacrucian nothrotheres.

A new giant megatheriine ground sloth (Mammalia: Xenarthra: Megatheriidae) from the late Blancan to early Irvingtonian of Florida

The giant megatheriine ground sloth Eremotherium eomigrans is described based on remains from the late Blancan to early Irvingtonian (late Pliocene to early Pleistocene) of Florida. It resembles the

Hypsodonty in Pleistocene ground sloths

Among Tardigrada hypsodonty is apparently affected by diet, habitat and habit, and among mylodontids, morphologic and biomechanical analyses indicate that hypsidonty was unlikely to be due solely to feeding behavior, such as grazing.

Last Glacial mammals in South America: a new scenario from the Tarija Basin (Bolivia)

The chronology, sedimentary history, and paleoecology of the Tarija Basin (Bolivia), one of the richest Pleistocene mammalian sites in South America, are revised here based on a multidisciplinary