Teiid lizards are well represented in the fossil record and are common components of
modern ecosystems in North and South America. Many fossils were referred to the …

We present a study of the musculature of the leiosaurids, an ecologically diverse family of
lizards that inhabits southern South America. Our first goal is to contribute to a better …

Together with Pliolagostomus notatus, Ameghino (1887) described four species of
Prolagostomus from the Santa Cruz Formation, and later four more species of …

The rodents of the middle Miocene fauna of Quebrada Honda Bolivia are described. The
most abundant rodent is the chinchillid Prolagostomus sp. More precise identification of this …

ABSTRACT In 1889, Florentino Ameghino erected Patriarchus palmidens, based on a
specimen from a western outcrop of the Santa Cruz Formation (early Miocene) and …

After several years of intense fieldwork in the area of Huayquerías del Este, northern
Mendoza (Argentina), the results account for more than 1,000 specimens and 67 taxa of …

Recent molecular analyses suggest that the evolutionary history of Cingulata (Xenarthra)
could be more complex than believed previously. An ancient divergence was proposed for …

We document the first occurrence of Sigmodontinae (Mammalia, Rodentia, Cricetidae) from
the Pliocene of northern South America, from the San Gregorio Formation of northwestern …

Four species of mylagaulid rodents are described from the Tesuque Formation, Espanola
Basin of New Mexico: Alphagaulus vetus, Ceratogaulus robustus, new species, Notogaulus …

The clade Leiosaurae currently includes 18 species in the genera Diplolaemus, Leiosaurus,
and Pristidactylus. It is mainly distributed in Argentina from 30° latitude south in the …