Cerro Bayo (MPEF-PV 1155) (Cretaceous of Argentina)

Also known as Sierra de La Colonia

Where: Chubut, Argentina (43.0° S, 67.5° W: paleocoordinates 45.3° S, 56.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: La Colonia Formation, Maastrichtian (72.1 - 66.0 Ma)

• Lower part of the second facies association (sensu Pascual et al., 2000) of the La Colonia Formation

•La Colonia Fm = Maastrichtian (Clyde et al. 2021)

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; lithology not reported

• darkly colored concretionary mass

Size class: macrofossils

Collected in 2012 and 2015

Primary reference: J. P. O'Gorman. 2020. First record of Kawanectes lafquenianum (Plesiosauria, Elasmosauridae) from the La Colonia Formation of Argentina, with comments on the mandibular morphology of elasmosaurids. Alcheringa 44(1):176-193 [E. Vlachos/F. Aspromonte/F. Aspromonte]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 219278: authorized by Philip Mannion, entered by Philip Mannion on 06.04.2021

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Plesiosauria - Elasmosauridae
Kawanectes lafquenianum Gasparini and Goni 1985 elasmosaur
MPEF-PV 1155, incomplete mandible, nine cervical vertebrae, 14 dorsal vertebrae, three sacral vertebrae and five caudal vertebrae, and almost complete left fore limb, the isolated right humerus, both femora, ilia, pubes and the right ischium