Sierra Dorotea, southern slopes (Cretaceous of Chile)

Also known as Elasmosaurid locality

Where: Puerto Natales, Chile (51.4° S, 72.4° W: paleocoordinates 53.3° S, 62.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Dorotea Formation, Maastrichtian (72.1 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; calcareous sandstone

• Horizon with calcareous lenses and concretionary nodules at an estimated elevation of 300 m a.s.l., located about 50 m below the top of the cliff

Size class: macrofossils

Collected in 2007

• Paleobotany Group of the Antarctic Ring Bicentenary Project (Proyecto Bicentenario Anillo Ant├írtico, PBCT-ARTG-04), directed by Dr. Teresa Torres. The material is hosted at the National Museum of Natural History (Museo Nacional de Historia Natural) of Santiago

Primary reference: R. A. Otero, M. E. Suarez, and J. P. Roux. 2009. First record of elasmosaurid plesiosaurs (Sauropterygia: Plesiosauria) in upper levels of the Dorotea Formation, Late Cretaceous (Maastrichtian), Puerto Natales, Chilean Patagonia. Andean Geology 36(2):342-350 [P. Mannion/J. Tennant]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 140919: authorized by Philip Mannion, entered by Jonathan Tennant on 19.03.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trigoniida - Megatrigonioidae
 Ammonitida - Kossmaticeratidae
Gunnarites sp. Kilian and Reboul 1909 ammonite
 Ammonitida - Pachydiscidae
 Sauropterygia - Elasmosauridae
Elasmosauridae indet. Cope 1869 elasmosaur
SGO.PV.6648: Seven vertebral centra, neural arches and at least six ribs, all poorly preserved