Previously unknown fossil platyrrhines (Primates) of Patagonia from the Tournouër collection at the Muséum national d'Histoire naturelle, Paris

Abstract

Three unpublished fossil primate specimens from Patagonia (Argentina) are reported here. They are part of the Tournouër collection housed at the Muséum national d'Histoire naturelle in Paris, France, and correspond to a partial mandible collected in 1902, and one upper deciduous premolar and one upper permanent molar collected in 1899. The partial mandible comes from the early Miocene sediments in the Coyle river area (Santa Cruz Province, Argentina), and is attributable to Homunculus patagonicus Ameghino, 1891. It adds to the several specimens assigned to Homunculus patagonicus that were collected since the times of the Ameghino brothers in the area, between the rivers Coyle and Gallegos. Two other dental specimens came from Colhue-Huapi (Chubut province, Argentina). Both are here assigned to Mazzonicebus almendrae Kay, 2010, the only known fossil primate in the early Miocene levels of Gran Barranca, in the Colhue-Huapi area. This contribution provides new morphological information concerning the mandible and dentition of Homunculus Ameghino, 1891, and the first evidence of the deciduous dentition of Mazzonicebus Kay, 2010.

New record of Neosaimiri (Cebidae, Platyrrhini) from the late Middle Miocene of Peruvian Amazonia

“…In the same publication, Stirton (1951) exceptional record, however, is unique, and represents only a snapshot of the evolutionary history of New World monkeys. Although the primate fossil record has continued to improve (slowly but considerably) in South America (e.g., Fleagle and Bown, 1983;Fleagle et al, 1987;Fleagle, 1990;Flynn et al, 1995;Kay et al, 1998Kay et al, , 2008Kay et al, , 2019Takai et al, 2000;Tejedor et al, 2005Tejedor et al, , 2006Kay and Cozzuol, 2006;Kay, 2010;Kramarz et al, 2012;Marivaux et al, 2012Marivaux et al, , 2016aPerry et al, 2014;Bond et al, 2015;Novo and Fleagle, 2015;Antoine et al, 2016;Bloch et al, 2016;Novo et al, 2018;Seiffert et al, 2020), virtually none of the species and genera recorded at La Venta had so far been found elsewhere. Only one lower molar recovered in much more recent levels (Huayquerian SALMA) in Acre, Brazil, was tentatively assigned to the alouattine Stirtonia known in La Venta (Kay and Frailey, 1993).…”