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Volume 80, Issue 3


New data on Abrawayaomys chebezi (Rodentia, Cricetidae), a poorly known South American sylvan rodent

Ulyses F.J. Pardiñas
  • Corresponding author
  • Unidad de Investigación Diversidad, Sistemática y Evolución, Centro Nacional Patagónico (CENPAT-CONICET), Boulevard Brown 2825, 9120 Puerto Madryn, Chubut, Argentina
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/ Pablo Teta
  • Unidad de Investigación Diversidad, Sistemática y Evolución, Centro Nacional Patagónico (CENPAT-CONICET), Boulevard Brown 2825, 9120 Puerto Madryn, Chubut, Argentina
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/ Marcela Lareschi
  • Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Boulevard 120 s/n e/ Av. 60 y Calle 64, 1900 La Plata, Argentina
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/ Carlos A. Galliari
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Published Online: 2015-04-24 | DOI: https://doi.org/10.1515/mammalia-2014-0178


Abrawayaomys chebezi is a spiny sigmodontine believed endemic to the Atlantic Forest of Misiones Province, Argentina. The available knowledge is largely restricted to the holotype, the only fully vouchered specimen. Here, we detail a second specimen, a subadult male obtained in the Parque Provincial Urugua-í (Misiones). The morphology of this animal confirms several diagnostic traits of A. chebezi, such as its smaller size relative to Abrawayaomys ruschii, the type species of the genus, and the simplified occlusal structure of its molars. New data on soft anatomy indicate that chebezi has a unilocular-hemiglandular stomach, no gall bladder, and a complex tridigitate penis with an external surface covered by rounded spines. A rich parasite assemblage including fleas and mites was recorded from this animal. A preliminary review of the alpha taxonomy of Abrawayaomys suggests the possible existence of three different species in the genus, one still unnamed.

This article offers supplementary material which is provided at the end of the article.

Keywords: Abrawayaomys ruschii; Argentina; Atlantic Forest; Misiones; Sigmodontinae


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About the article

Received: 2014-12-17

Accepted: 2015-03-19

Published Online: 2015-04-24

Published in Print: 2016-05-01

Citation Information: Mammalia, Volume 80, Issue 3, Pages 341–348, ISSN (Online) 1864-1547, ISSN (Print) 0025-1461, DOI: https://doi.org/10.1515/mammalia-2014-0178.

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