900 m SW of Punta Hermengo (upper) (Pleistocene of Argentina)

Where: Buenos Aires, Argentina (38.3° S, 57.9° W: paleocoordinates 38.3° S, 57.6° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Arroyo Seco Formation, Lujanian (0.8 - 0.0 Ma)

• collection from above the erosional unconformity that divides the Miramar formation from the Arroyo Seco Formation, within the upper part of the cliff (barranca)

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; medium-grained, calcareous sandstone

• translated: calcareous and quartzose phenoclasts in a matrix of medium to coarse sand with a calcium carbonate cement.

Size classes: macrofossils, mesofossils

Primary reference: E. P. Tonni. 1970. Zonotrichia robusta n.sp. (Aves, Passeriformes, Emberizidae) from middle Pleistocene of Buenos Aires Province. Ameghiniana 7:161-165 [J. Alroy/J. Wertheim/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37999: authorized by John Alroy, entered by Jill Wertheim on 30.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Rodentia - Ctenomyidae
Ctenomys sp. de Blainville 1826 caviomorph
 Perissodactyla - Equidae
Equus sp. Linnaeus 1758 horse
 Xenarthra - Mylodontidae
Scelidotherium sp. Owen 1839 edentate
 Xenarthra - Megatheriidae
Megatherium sp. Cuvier 1796 edentate
 Litopterna - Macraucheniidae
Macrauchenia sp. Owen 1838 eutherian