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Colonia La Celina (Miocene of Argentina)

Also known as Paraná River

Where: Entre Rios, Argentina (31.6° S, 60.3° W: paleocoordinates 31.7° S, 58.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Conglomerado Osifero Member (Ituzaingo Formation), Huayquerian (9.0 - 6.8 Ma)

• The fluvial Ituzaingo Formation overlies the marine unit. This formation is composed of a basal conglomerate (“Conglomerado osifero”) with abundant vertebrate remains which is overlain by almost unfossiliferous whitish to yellow brown sandstones and green mudstones. Terrigenous Pleistocene (Ensenadan to Lujanian in the southern South American continental scale; see Cione and Tonni, 1995, 1996, 2001; Fig. 2), poorly fossiliferous beds assigned to different units overlay the Ituzaingo Formation (Aceñolaza, 1976; Iriondo, 1980; Chebli et al., 1989). The Ituzaingo Formation (as Entre Rios Formation) was correlated with the “Formacio ́n Puelche” of the Buenos Aires province subsoil (Reig, 1957; see below). According to the mammals occurring in the “Conglomerado osifero” and the stratigraphic relationships, the age of the base of Ituzaingo Formation is almost exclusively Tortonian (late Miocene) or Huayquerian in the local chronology (Pascual and Odreman Rivas, 1971; Cione and Tonni, 1995; Fig.2).

Environment/lithology: fluvial; conglomerate and white mudstone

• The fluvial Ituzaingo Formation overlies the marine unit (i.e., Parana Fm.). This formation is composed of a basal conglomerate (“Conglomerado osifero”) with abundant vertebrate remains which is overlain by almost unfossiliferous whitish to yellow brown sandstones and green mudstones. See Fig. 2 for further details on lithology and stratigraphy

Size class: macrofossils

Collected by J. Casciotta, A. Cione, J. Noriega and L. Soibelzon in 1999

Primary reference: L. A. Cione, W. M. Dahdul, J. G. Lundberg and A. Machado-Allison. 2009. Megapiranha paranensis, a new genus and species of Serrasalmidae (Characiformes, Teleostei) from the upper Miocene of Argentina. Journal of Vertebrate Paleontology 29(2):350-358 [C. Jaramillo/G. Ballen] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 140472: authorized by Carlos Jaramillo, entered by Gustavo Ballen on 10.03.2013, edited by Juan Carrillo and Evangelos Vlachos

Creative Commons license: CC BY (attribution)