Discovery of a new genus record for Paraguay, the Atlantic Forest endemic rodent Abrawayaomys (Cricetidae, Sigmodontinae)

  • 1 Department of Biological Sciences, Chicago State University, 9501 S. King Drive, Chicago, USA
  • 2 The Field Museum of Natural History, Integrative Research Center, 1400 S Lake Shore Dr, Chicago, USA
  • 3 Instituto de Diversidad y Evolución Austral (IDEAus-CONICET), Puerto Madryn, Argentina
  • 4 Instituto Nacional de Biodiversidad (INABIO), Quito, Ecuador
Noé U. de la SanchaORCID iD: https://orcid.org/0000-0002-1342-5556
  • Corresponding author
  • Department of Biological Sciences, Chicago State University, 9501 S. King Drive, Chicago, IL 60628, USA
  • The Field Museum of Natural History, Integrative Research Center, 1400 S Lake Shore Dr, Chicago, IL 60605, USA
  • orcid.org/0000-0002-1342-5556
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, Gustavo S. LibardiORCID iD: https://orcid.org/0000-0001-9851-5245 and Ulyses F.J. PardiñasORCID iD: https://orcid.org/0000-0001-9496-5433

Abstract

The mammals of Paraguay are still poorly known. We report a new genus for the country, Abrawayaomys, a spiny cricetid rodent endemic for the Interior Atlantic Forest. This record extends the distribution of the genus approximately 100 km, and west of the Paraná River. This addition increases the number of mammals in Paraguay to 184 and verifies that rodents are the most diverse group of mammals in the country. We outline identifying morphological characters of Abrawayaomys and elaborate on the significance of this finding for conservation and biogeography in the region.

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Mammalia is a peer-reviewed journal devoted to the inventory, analysis and interpretation of Mammalian diversity. It publishes original results on all aspects of systematics (comparative, functional and evolutionary morphology; morphometrics; phylogeny; biogeography; taxonomy and nomenclature), biology, ecology and conservation of mammals.

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