Cerro Tortuga, Bajo Trapalcó (Cretaceous to of Argentina)

Also known as Lamarquesaurus cabazai type

Where: Río Negro, Argentina (39.4° S, 67.3° W: paleocoordinates 42.2° S, 53.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lower Member (Allen Formation), Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• Lower to middle part of Allen Formation, ca. 6 m from the base levels of exposures at the ‘‘Cerro Tortuga’’ locality and ca. 52 m below the K/T (Cretaceous-Tertiary) boundary, recognized in the overlying Jagu¨el Formation (Gasparini et al., 2003; Casadío, personal commun.).

• bed-level stratigraphic resolution

Environment/lithology: fluvial; poorly lithified, fine-grained, yellow sandstone and siltstone

• The fossiliferous layer is 60–65 cm thick and is composed of clean, yellowish to light brown, friable medium sandstone. The layer yields a rich collection of disarticulated fossils with a clear bias to small specimens; fish and snake remains are

•particularly abundant.

Size classes: macrofossils, mesofossils

• MML-PV-42. Right maxilla preserving 10 teeth with different degrees of completeness. The fossil material is three dimensional and tooth enamel and wear facets are well preserved

Collected by G. W. Rougier & crew in 2002-2004; reposited in the MLP

Collection methods: surface (float), surface (in situ),

Primary reference: S. Apesteguía and G. W. Rougier. 2007. A Late Campanian sphenodontid maxilla from Northern Patagonia. American Museum Novitates (3581)1-11 [R. Benson/R. Benson/F. Aspromonte]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 232506: authorized by Evangelos Vlachos, entered by Franco Aspromonte on 30.11.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Eosuchia -
Lamarquesaurus cabazai n. gen. n. sp.
Lamarquesaurus cabazai n. gen. n. sp. Apesteguía and Rougier 2007 lepidosaur
MML-PV-42, right maxilla preserving 10 teeth