Where: Entre Rios, Argentina (33.7° S, 59.3° W: paleocoordinates 33.8° S, 56.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Entrerriana Formation, Tortonian (11.6 - 7.2 Ma)

• Predominant faunal elements indicate a Huayquerian age, but there are rare forms that might be reworked from older deposits of Santacrucian and/or Chasicoan age, and a few others which are representatives of Montehermosan age;

•"Fossiliferous beds in this area have received numerous names....The name "Entrerriense" or "Formacion Entrerriana" has been applied to the somewhat younger marine facies... fluviatile facies has been generally included under the name "Mesopotamiense"...."

•Huayquerian is now known as late Miocene

• formation-level stratigraphic resolution

Environment/lithology: marginal marine; siltstone and sandstone

Size class: macrofossils

Primary reference: L. G. Marshall. 1977. First Pliocene record of the water opposum, Chironectes minimus (Didelphidae, Marsupialia). Journal of Mammalogy 58(3):434-436 [J. Alroy/J. Wertheim/J. Alroy] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13626: authorized by John Alroy, entered by Jill Wertheim on 16.04.2002, edited by Mark Uhen, Philip Mannion and John Alroy

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)