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Additions to the knowledge of Urumaquia robusta (Xenarthra, Phyllophaga, Megatheriidae) from the Urumaco Formation (Late Miocene), Estado Falcon, Venezuela


Carlini, A A; Brandoni, D; Sánchez, R (2008). Additions to the knowledge of Urumaquia robusta (Xenarthra, Phyllophaga, Megatheriidae) from the Urumaco Formation (Late Miocene), Estado Falcon, Venezuela. Paläontologische Zeitschrift, 82(2):153-162.

Abstract

We describe new remains ofUrumaquia robusta Carlini, Brandoni & Sänchez, 2006, which significantly improve the knowledge of the species and allow a more precise discussion about the relationships with the rest of the South American Megatheriinae. The new remains (ulna, phalanx, femora, patella, tibia, astragalus, navicular, metatarsals IV–V) described here suggest close affinities of this taxon with the species ofPyramiodontherium and withMegatheriops rectidens, based on morphological similarities of the ulna (length, gracility), femur (general morphology, shape of the medial margin), and astragalus (angle between the discoidal and odontoid facets). In fact, the shape of femoral medial margin is a shared derived character amongUrumaquia, Pyramiodontherium andMegatheriops. However, and despite the increasing information concerning Tertiary species, their phylogenetic relationships are only partially understood.

Abstract

We describe new remains ofUrumaquia robusta Carlini, Brandoni & Sänchez, 2006, which significantly improve the knowledge of the species and allow a more precise discussion about the relationships with the rest of the South American Megatheriinae. The new remains (ulna, phalanx, femora, patella, tibia, astragalus, navicular, metatarsals IV–V) described here suggest close affinities of this taxon with the species ofPyramiodontherium and withMegatheriops rectidens, based on morphological similarities of the ulna (length, gracility), femur (general morphology, shape of the medial margin), and astragalus (angle between the discoidal and odontoid facets). In fact, the shape of femoral medial margin is a shared derived character amongUrumaquia, Pyramiodontherium andMegatheriops. However, and despite the increasing information concerning Tertiary species, their phylogenetic relationships are only partially understood.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Uncontrolled Keywords:Megatheriinae - Urumaquia robusta - Urumaco Formation - Venezuela - postcranial bones
Language:English
Date:2008
Deposited On:05 Feb 2009 15:21
Last Modified:05 Apr 2016 12:47
Publisher:Springer
ISSN:0031-0220
Publisher DOI:https://doi.org/10.1007/BF02988406
Official URL:http://www.springerlink.com/content/v737h0n31h88756u/?p=d5d5c9100b9e4340bd2c29c228c49c68&pi=5

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