Par-Aik, Río Sehuen (Cretaceous to of Argentina)

Also known as Rîo Shehuen, Loncosaurus type site

Where: Santa Cruz, Argentina (49.6° S, 69.6° W: paleocoordinates 52.4° S, 56.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Mata Amarilla Formation, Santonian to Santonian (86.3 - 70.6 Ma)

• also listed as Cardiel Formation and Matasiete Formation - orig. the "Guaranitic Formation", found above a layer with Ostrea guaranitica, but the bed coninues below this layer as well.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified, red sandstone

• "a bank of red sandstone"

Size classes: macrofossils, mesofossils

Collected by C. Ameghino in the 1890s; reposited in the MACN

Primary reference: F. Ameghino. 1899. Nota preliminar sobre el Loncasaurus argentinus un representante de la familia de los Megalosauridae en la República Argentina [Preliminary note on Loncasaurus argentinus, a representative of the family Megalosauridae in the Argentine Republic]. Anales de la Sociedad Científica Argentina 47:61-62 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49095: authorized by Matthew Carrano, entered by Matthew Carrano on 08.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Saurischia -
Clasmodosaurus spatula n. gen. n. sp.2
Clasmodosaurus spatula n. gen. n. sp.2 Ameghino 1898 sauropod
teeth; Ameghino pers. coll.
 Theropoda -
Theropoda indet.1 theropod
tooth, "carnivorous saurischian"
 Neornithischia -
Loncosaurus argentinus n. gen. n. sp.
Loncosaurus argentinus n. gen. n. sp. Ameghino 1899 bird foot dinosaur
femur, MACN 1629