PBDB Collection

Eastern slopes of the La Colonia area (Cretaceous of Argentina)

Where: Chubut, Argentina (42.9° S, 67.5° W: paleocoordinates 45.2° S, 55.9° W)

• coordinate stated in text

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

• Fossil localities described from "second facies association of the La Colonia Formation.." (Albino, 2000:248). No further stratigraphic data provided.

•

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

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; lithology not reported

• Depositional environment described as "...estuary, tidal flat, or coastal plain environment, influenced both by occasional high fresh water stream flow from the continent and tidal occurrences from the sea..." (Albino, 2000:249).

Size class: macrofossils

Reposited in the MEF

Primary reference: A. M. Albino. 2000. New record of snakes from the Cretaceous of Patagonia (Argentina). Geodiversitas 22(2):247-253 [J. Head/J. Head/P. Mannion]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 26749: authorized by Jason Head, entered by Jason Head on 27.10.2002, edited by Jonathan Tennant and Franco Aspromonte

Creative Commons license: CC BY (attribution)

Taxonomic list

• Additional taxa listed from second facies include: fishes, turtles, crocodiles, plesiosaurs, dinosaurs, mammals. No additional information is provided.

Show authors, comments, and common names

Reptilia
Serpentes -	Serpentes indet. Serpentes indet. snake MPEF-PV 642, trunk vertebra
Squamata - Madtsoiidae	Alamitophis argentinus, Eomadtsoia ragei², Eomadtsoia ragei² Alamitophis argentinus Albino 1986 snake MPEF-PV 643, trunk vertebra Eomadtsoia ragei² Gómez et al. 2019 snake MPEF-PV 641, MPEFPV 644 and MPEF-PV 645, incomplete vertebrae Eomadtsoia ragei² Gómez et al. 2019 snake MPEF-PV 646, MPEFPV 647, MPEF-PV 648 and MPEF-PV 649, incomplete vertebrae
Plesiosauria - Elasmosauridae	Elasmosauridae indet.¹ Elasmosauridae indet.¹ Cope 1869 elasmosaur MPEF s/n, isolated and incomplete cervical and dorsal vertebrae

¹Gasparini et al. 2001; ²Gómez et al. 2019