The dental evidence on the differentiation of the ctenomyine rodents (Caviomorpha, Octodontidae, Ctenomyinae)

Sequence evolution of the major satellite DNA of the genus Ctenomys (Octodontidae, Rodentia)

“…Although the gcs does not reveal the percentage of each nucleotide or the existence of putative RPCS subfamilies, their examination evidences a remarkably high number of positions with partially shared ip, suggesting that these variants were all present as co-existing in the ancestral pool of RPCS. So far, when we examine the gcs of O. degus, a representative of the sister subfamily Octodontinae that diverged from Ctenomyinae about 10 million years ago (Verzi, 1999), all but one of the 20 ip resulted to be totally or partially shared with those of Ctenomys species (not shown). Ancestral variants could be totally shared between both subfamilies, for instance M (A/C) in both or partially shared.…”

Geology and geochronology of type Chasicoan (late Miocene) mammal-bearing deposits of Buenos Aires (Argentina)

“…Recently, a Chasicoan age was attributed to sediments exposed along two very small roadcuts situated in the western margin of the southern Pampean plain (Verzi, 1999).…”

Late Cenozoic Vertebrates From the Southern Pampean Region: Systematic and Bio-Chronostratigraphic Update

“…Zárate (2009, 2011) gathered them as the Cerro Azul Formation and interpreted that they represent distal sinorogenic facies that document the Andean tectonic dynamic. Folguera and Zárate (2009) and Montalvo et al (2012) proposed an evolutionary, regional geological model to explain the geographical distribution and antiquity of the faunal emblages found in the Cerro Azul Formation (see Verzi, 1999). According to the fossil content it includes deposits of the Chasicoan and Huayquerian ages (Fig.…”