A new large didelphid of the genus Thylophorops (Mammalia: Didelphimorphia: Didelphidae), from the late Tertiary of the Pampean Region (Argentina)

descriptionPublicationkeyboard_double_arrow_right Article 09 Feb 2009 Argentina Publisher:Magnolia PressJournal:Zootaxa, volume 2,005 (issn: 1175-5326, eissn: 1175-5334,

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Authors: Reyes, Marcelo de los; Soibelzon, Leopoldo Héctor; Zimicz, Natalia; Goin, Francisco Javier;

doi: 10.11646/zootaxa.2005.1.3 , 10.5281/zenodo.185652

handle: 11336/67625

A new large didelphid of the genus Thylophorops (Mammalia: Didelphimorphia: Didelphidae), from the late Tertiary of the Pampean Region (Argentina)

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Abstract

We describe Thylophorops lorenzinii sp. nov. (Marsupialia, Didelphidae), the largest known didelphid opossum, living or extinct. Its type specimen comes from Late Pliocene levels at Punta San Andrés, southeastern Buenos Aires Province, Argentina. With an estimated body mass between 4.8 and 7.4 kg, it obviously surpasses that of the (up to now) largest didelphid, the living Didelphis virginiana Kerr. In addition to its larger size, the new species differs from T. chapalmalensis Ameghino and T. perplanus Ameghino in that its lower molars have more labially salient hypoconids and proportionally large hypoconulids which are not antero-posteriorly compressed.

Country

Argentina

Related Organizations

National Scientific and Technical Research Council
Argentina
National University of La Plata
Argentina

Keywords

Thylophorops Lorenzinii, Zarigüeyas, Didelphidae, Thylophorops lorenzinii sp. nov., Argentina, Marsupiales, Biodiversity, Didelphimorphia, Marplatan, Paleontología, Thylophorops lorenzinii sp. nov.; didelphidae; piso/edad marplatense, marplatan stage/age, https://purl.org/becyt/ford/1.6, Mammalia, Ciencias Naturales, Animalia, didelphidae, https://purl.org/becyt/ford/1, Chordata, Thylophorops lorenzinii sp. nov.; didelphidae; marplatan stage/age, piso/edad marplatense, Taxonomy

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