MACN Gran Barranca 1 (Eocene of Argentina)

Where: Chubut, Argentina (42.9° S, 71.3° W: paleocoordinates 45.4° S, 61.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Sarmiento Formation, Mustersan (48.0 - 42.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; volcaniclastic sediments

• Gastropods are found in paleosols and massive pyroclastic mudstones

Size classes: macrofossils, mesofossils

Primary reference: S. E. Miquel and E. S. Bellosi. 2010. Middle Eocene - Oligocene gastropods of the Sarmiento Formation, central Patagonia. In R. H. Madden, A. A. Carlini, M. G. Vucetich and R. F. Kay (eds.), The Paleontology of Gran Barranca [J. Sessa/L. Eccles/L. Eccles]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 105837: authorized by Jocelyn Sessa, entered by Laurie Eccles on 26.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Stylommatophora - Odontostomidae
"Helix dentata" = Plagiodontes dentatus
"Helix dentata" = Plagiodontes dentatus Wood 1828 slug
 Stylommatophora - Charopidae
Stephadiscus sp., Gyrocochlea sp., Rotadiscus sp., Colhueconus simpsoni, Radiodiscus sp., Stephanoda ? mazzonii, Lilloiconcha sp., Zilchogyra "sp. A", Zilchogyra "sp. B"
Stephadiscus sp. Hylton Scott 1981 slug
cf. Stephadiscus celinae
Gyrocochlea sp. Hedley 1924 slug
cf. Gyrocochlea ? mirablilis
Rotadiscus sp. Pilsbry 1926 slug
cf. Rotadiscus amancaezensis
Colhueconus simpsoni Miquel and Bellosi 2010 slug
Radiodiscus sp. Pilsbry 1906 slug
cf. Radiodiscus riochicoensis
Stephanoda ? mazzonii Miquel and Bellosi 2004 slug
Lilloiconcha sp. Weyrauch 1965 slug
cf. Lilloiconcha gordurasensis
Zilchogyra "sp. A" Weyrauch 1965 slug
Zilchogyra "sp. B" Weyrauch 1965 slug
  -
Bulimus lutescens
Bulimus lutescens King and Broderip 1831 snail