Cajon Troncoso 3 (Jurassic of Argentina)

Where: Mendoza, Argentina (36.0° S, 71.0° W: paleocoordinates 33.4° S, 33.5° W)

• coordinate estimated from map

When: Lotena Formation, Early/Lower Oxfordian (161.2 - 155.7 Ma)

Environment/lithology: marginal marine; green, blue siltstone

Size class: macrofossils

Primary reference: H. Parent. 2006. Oxfordian and late Callovian ammonite faunas and biostratigraphy of the Neuquen-Mendoza and Tarapaca Basins (Jurassic, Ammonoidea, Western South-America). Boletin del Instituto de Fisiografia y Geologia 76(1-2):1-70 [J. Alroy/J. Martinelli]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 136699: authorized by John Alroy, entered by Julieta Martinelli on 02.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

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Bivalvia
 Myalinida - Inoceramidae
Retroceramus aff. galoi
Cephalopoda
 Ammonitida - Aspidoceratidae
Peltoceratoides pressulus, Peltoceratoides ballenaensis, Euaspidoceras cf. ajax
Peltoceratoides pressulus Leanza 1947 ammonite
Peltoceratoides ballenaensis Hillebrandt 1995 ammonite
Euaspidoceras cf. ajax Leanza 1947 ammonite
 Ammonitida - Perisphinctidae
"Perisphinctes cf. mazuricus" = Prososphinctes consociatus, "Tenuisphinctes cf. herreroduclouxi" = Cubasphinctes herreroduclouxi
"Perisphinctes cf. mazuricus" = Prososphinctes consociatus Bukowski 1887 ammonite
"Tenuisphinctes cf. herreroduclouxi" = Cubasphinctes herreroduclouxi Leanza 1947 ammonite
 Ammonitida - Oppeliidae
Neoprionoceras cf. henrici, Neocampylites cf. delmontanus, Trimarginites cf. eucaris
Neoprionoceras cf. henrici d'Orbigny 1850 ammonite
Neocampylites cf. delmontanus Oppel 1863 ammonite