First Fossil Record of Sigmodontine Rodents (Mammalia: Cricetidae) for Paraguay: Taxonomy and Late Pleistocene Environments

Torres, J. Ruíz; Teta, Pablo; Filippi, Victor; Owen, Robert Dale; Pardiñas, Ulyses F. J.

doi:10.5710/amgh.11.06.2015.2908

Cited by 5 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[70,71]), and Paraguay (Risso cave; O. sp. [72]). Holocene localities also yielded Oligoryzomys remains from Argentina (La Mesada, Ruinas Jesuíticas de San José de Lules, La Angostura and Cueva Traful [22,81,82].…”

Section: Oligoryzomys and Zygodontomys: Palaeoenvironmental Significancementioning

confidence: 99%

Pliocene sigmodontine rodents (Mammalia: Cricetidae) in northernmost South America: test of biogeographic hypotheses and revised evolutionary scenarios

et al. 2023

View full text Add to dashboard Cite

We document the first occurrence of Sigmodontinae (Mammalia, Rodentia, Cricetidae) from the Pliocene of northern South America, from the San Gregorio Formation of northwestern Venezuela. The recovered isolated molars are identified as Oligoryzomys sp. and Zygodontomys sp., two currently widespread sigmodontines in South America. These records constitute the oldest representatives of these genera, potentially new species, and the first Pliocene occurrence for Oryzomyini and the whole subfamily outside Argentina. Hypotheses on the historical biogeography of sigmodontines have been constructed almost exclusively using genetic data and the fossils we report provide a new kind of evidence. The occurrence of Oligoryzomys sp. and Zygodontomys sp. in Venezuela provides novel information for the diversification models suggested for Oligoryzomys , by supporting a potential eastern corridor of open environments from northern to southern South America. The presence of sigmodontines from the locality home of the new reports, Norte Casa Chiguaje, is consistent with the palaeoenvironmental conditions originally proposed for it based on mammals and botanical records, being characterized as mixed open grassland/forest areas surrounding permanent freshwater systems. The new sigmodontine evidence is used to discuss the putative scenarios of the ancient evolution of the subfamily in South America, favouring a model in which open areas (savannahs) to the east of the Andes played crucial role aiding or obstructing Late Miocene–Pliocene sigmodontine dispersion southwards.

show abstract

Section: Oligoryzomys and Zygodontomys: Palaeoenvironmental Significancementioning

confidence: 99%

Pliocene sigmodontine rodents (Mammalia: Cricetidae) in northernmost South America: test of biogeographic hypotheses and revised evolutionary scenarios

et al. 2023

View full text Add to dashboard Cite

show abstract

Physicochemical analysis of Catonyx cuvieri (Mammalia, Xenarthra) remains from the Pleistocene of Paraguay

Sanabria,

Colman,

Celeste Aquino

et al. 2024

Results in Chemistry

View full text Add to dashboard Cite

Noteworthy sigmodontine (Rodentia: Cricetidae) diversity in southern Brazil as an indication of environmental change during the Holocene

et al. 2018

View full text Add to dashboard Cite

First Fossil Record of Sigmodontine Rodents (Mammalia: Cricetidae) for Paraguay: Taxonomy and Late Pleistocene Environments

Abstract: First fossil record of sigmodontine rodents (Mammalia: Cricetidae) for Paraguay: taxonomy and Late Pleistocene environments. Ameghiniana 52: 574-581.

Cited by 5 publications

References 21 publications

Pliocene sigmodontine rodents (Mammalia: Cricetidae) in northernmost South America: test of biogeographic hypotheses and revised evolutionary scenarios

Pliocene sigmodontine rodents (Mammalia: Cricetidae) in northernmost South America: test of biogeographic hypotheses and revised evolutionary scenarios

Physicochemical analysis of Catonyx cuvieri (Mammalia, Xenarthra) remains from the Pleistocene of Paraguay

Noteworthy sigmodontine (Rodentia: Cricetidae) diversity in southern Brazil as an indication of environmental change during the Holocene

Contact Info

Product

Resources

About