Chacaico Sur, Los Molles (Jurassic of Argentina)

Where: Neuquen, Argentina (39.3° S, 70.3° W: paleocoordinates 37.0° S, 31.1° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Emileia giebeli ammonoid zone, Los Molles Formation (Cuyo Group), Early/Lower Bajocian (171.6 - 168.4 Ma)

• bed-level stratigraphic resolution

Environment/lithology: offshore; shale and marl

• "dark shales and marls" (Gasparini 1997)

Size class: macrofossils

Collection methods: MOZ, Museo Olsacher, Zapala, Neuquén, Argentina

Primary reference: M. S. Fernandez. 1999. A new ichthyosaur from the Los Molles Formation (Early Bajocian), Neuquen Basin, Argentina. Journal of Paleontology 73(4):677-681 [M. Carrano/H. Street]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 102280: authorized by Matthew Carrano, entered by Hallie Street on 12.01.2011, edited by John Alroy and Jonathan Tennant

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ammonitida - Sonniniidae
 Loricata -
Thalattosuchia indet.2 marine crocodile
Single caudal vertebra
 Sauropterygia - Rhomaleosauridae
Maresaurus coccai n. gen. n. sp.1
Maresaurus coccai n. gen. n. sp.1 Gasparini 1997 plesiosaur
Near-complete three-dimensional skull
 Ichthyosauria - Ophthalmosauridae
Mollesaurus periallus Fernandez 1999 ichthyosaur