On Megatherium gallardoi (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina

The Megatheriinae (Mammalia, Xenarthra, Megatheriidae) are recorded in Argentina from the middle Miocene to the early Holocene. Only the genus Megatherium, comprising several species of controversial validity, is recognized for the Pleistocene of the Pampean region. Megat...

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Autores principales:	Brandoni, Diego, Soibelzon, Esteban, Scarano, Alejo Carlos
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2008
Materias:	Ciencias Naturales Paleontología Mammalia Megatheriidae Megatherium gallardoi Megatherium silenum Bonaerian Ensenadan Buenos Aires province Argentina
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/100751 https://ri.conicet.gov.ar/11336/80911 http://sciencepress.mnhn.fr/en/periodiques/geodiversitas/30/4/sur-megatherium-gallardoi-mammalia-xenarthra-megatheriidae-et-les-megatheriinae-de-l-ensenadeen-pleistocene-inferieur-moyen-de-la-region-pampeenne-argentine http://sciencepress.mnhn.fr/sites/default/files/articles/pdf/g2008n4a7.pdf
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-100751
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Naturales Paleontología Mammalia Megatheriidae Megatherium gallardoi Megatherium silenum Bonaerian Ensenadan Buenos Aires province Argentina
spellingShingle	Ciencias Naturales Paleontología Mammalia Megatheriidae Megatherium gallardoi Megatherium silenum Bonaerian Ensenadan Buenos Aires province Argentina Brandoni, Diego Soibelzon, Esteban Scarano, Alejo Carlos On <i>Megatherium gallardoi</i> (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina
topic_facet	Ciencias Naturales Paleontología Mammalia Megatheriidae Megatherium gallardoi Megatherium silenum Bonaerian Ensenadan Buenos Aires province Argentina
description	The Megatheriinae (Mammalia, Xenarthra, Megatheriidae) are recorded in Argentina from the middle Miocene to the early Holocene. Only the genus <i>Megatherium</i>, comprising several species of controversial validity, is recognized for the Pleistocene of the Pampean region. <i>Megatherium americanum</i> is the best studied species and occurs frequently in sediments assigned to the Lujanian stage (<i>Equus</i> (<i>Amerhippus</i>) <i>neogeus</i> Biozone, c. 0.13-0.08 My). On the other hand, <i>M. gallardoi</i> and <i>M. silenum</i>, both from Ensenadan sediments (<i>Mesotherium cristatum</i> Biozone) of Buenos Aires Province, have been considered by some authors as synonyms of <i>M. americanum</i>. The main goal of this contribution is to complete the description of <i>M. gallardoi</i>, clarify its taxonomic status, and establish its relationships with other megatheriines. Th e most remarkable features of <i>M. gallardoi</i> are: premaxillae not fused to each other or to the maxillae; mandibular ramus relatively low; femur with lateral and medial diaphyseal of the patellar trochlea; humerus and femur robust. Based on the anatomical and comparative analysis, we propose that: 1) <i>M. gallardoi</i> is a valid species; 2) specimen MACN Pv 5002 (holotype of <i>M. gallardoi</i>) is an adult individual; 3) <i>M. gallardoi</i> is related to the clade formed by <i>M. americanum</i> and <i>M. altiplanicum</i>; and 4) <i>M. silenum</i> (the other Megatheriinae known for the Ensenadan Stage of Argentina) should be considered <i>nomen vanum</i> because it lacks diagnostic features and corresponds undoubtedly to a juvenile individual.
format	Articulo Articulo
author	Brandoni, Diego Soibelzon, Esteban Scarano, Alejo Carlos
author_facet	Brandoni, Diego Soibelzon, Esteban Scarano, Alejo Carlos
author_sort	Brandoni, Diego
title	On <i>Megatherium gallardoi</i> (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina
title_short	On <i>Megatherium gallardoi</i> (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina
title_full	On <i>Megatherium gallardoi</i> (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina
title_fullStr	On <i>Megatherium gallardoi</i> (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina
title_full_unstemmed	On <i>Megatherium gallardoi</i> (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina
title_sort	on <i>megatherium gallardoi</i> (mammalia, xenarthra, megatheriidae) and the megatheriinae from the ensenadan (lower to middle pleistocene) of the pampean region, argentina
publishDate	2008
url	http://sedici.unlp.edu.ar/handle/10915/100751 https://ri.conicet.gov.ar/11336/80911 http://sciencepress.mnhn.fr/en/periodiques/geodiversitas/30/4/sur-megatherium-gallardoi-mammalia-xenarthra-megatheriidae-et-les-megatheriinae-de-l-ensenadeen-pleistocene-inferieur-moyen-de-la-region-pampeenne-argentine http://sciencepress.mnhn.fr/sites/default/files/articles/pdf/g2008n4a7.pdf
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On <i>Megatherium gallardoi</i> (Mammalia, Xenarthra, Megatheriidae) and the Megatheriinae from the Ensenadan (lower to middle Pleistocene) of the Pampean region, Argentina

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