Manzano Escondido (Jurassic to of Argentina)

Where: Neuquen, Argentina (39.0° S, 70.0° W: paleocoordinates 36.0° S, 31.7° W)

• coordinate estimated from map

When: Lotena Formation, Late/Upper Callovian to Late/Upper Callovian (164.7 - 155.7 Ma)

Environment/lithology: marginal marine; ferruginous, nodular, green, calcareous mudstone and ferruginous, nodular, calcareous siltstone

Size class: macrofossils

Preservation: mold/impression

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 135717: authorized by John Alroy, entered by Julieta Martinelli on 05.11.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Perisphinctidae
Perisphinctidae indet., Choffatia sp.
Perisphinctidae indet. Steinmann 1890 ammonite
Choffatia sp. ammonite
 Ammonitida - Sphaeroceratidae
Eurycephalitinae indet., Araucanites prereyesi
Eurycephalitinae indet. Thierry 1976 ammonite
Araucanites prereyesi Parent 2006 ammonite
 Ammonitida - Aspidoceratidae
Peltoceras convexum, Euaspidoceras aff. ovale
Peltoceras convexum Hillebrandt 1995 ammonite
Euaspidoceras aff. ovale Neumann 1907 ammonite
sp nov.
 Ammonitida - Oppeliidae
Hecticoceratinae indet., Hecticoceras discoides, Hecticoceras hersilia, Hecticoceras virguloides, Hecticoceras lairense
Hecticoceratinae indet. Spath 1925 ammonite
Hecticoceras virguloides Gerard and Contaut 1936 ammonite
Hecticoceras lairense Waagen 1875 ammonite