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.

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

Campamento Vespucio, una nueva localidad con mamíferos pleistocenos en la provincia de Salta, Argentina

A new locality with Pleistocene fossil mammals is presented in northern part of Argentina, very scarce compared with respect to that of the Pampean region, and improves the knowledge that is available in this scenario.

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

Evolutionary Relationships among Extinct and Extant Sloths: The Evidence of Mitogenomes and Retroviruses

A fully resolved and well-supported phylogeny is produced that supports dividing crown families into two major clades: 1) The three-toed sloth, Bradypus, and Nothrotheriidae and 2) Megalonychidae, including the two- toed sloths, Choloepus and Mylodontidae.




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


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.

The Edentata of North America

  • E. Cope
  • Geology
    The American Naturalist
  • 1889
Of these divisions it is evident hat the Nomarthra are the least specialized, and must be regarded as ancestral to the Xenarthra, which are now exclusively Old World, while the Xexartkra are confined to the New World.