A new record of Tayassuidae (Mammalia: Cetartiodactyla) from the Pleistocene of northern Brazil.

In this contribution, we described a new fossil of a Pleistocene Tayassuidae from northern Brazil. The specimen is a left dentary with molars assigned to cf. Pecari tajacu recovered from an outcrop of the Rio Madeira Formation, State of Rondônia, Brazil.

Unraveling the nomenclatural puzzle of the collared and white-lipped peccaries (Mammalia, Cetartiodactyla, Tayassuidae).

The nomenclatural history of the collared and white-lipped peccaries, two well-recognized taxonomic entities, has been confusing. From the 18th century to the beginning of the 20th century, several genera were created, most of them without an explicit designation of type species. Due to differing opinions as to whether the two species should be included in a single genus or, if separate genera were recognized, which generic name should be applied to each of the two taxa, the validity of generic and specific names oscillated until even recently.