Algarrobo (EQM) (Cretaceous of Chile)

Also known as Marine reptile site

Where: Santiago, Chile (33.4° S, 71.7° W: paleocoordinates 35.5° S, 59.2° W)

• coordinate stated in text

When: Estratos de Quebrada Municipalidad Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• The EQM is considered to be Maastrichtian in age based on bivalves such as C. acuticostatum and P. hanetiana (Pérez-D’Angelo and Reyes, 1978). Recently this determination has been constrained by a radiometric date on 90Sr/89Sr obtained from bivalve shells (Suárez and Marquardt, 2003) that indicated an age of 69 +- 01 Ma (early Maastrichtian).

Environment/lithology: marine; fine-grained sandstone and conglomerate

Size class: macrofossils

Collected in 2006

Primary reference: R. A. Otero, J. F. Parham, S. Soto-Acuña, P. Jimenez-Huidobro, and D. Rubilar-Rogers. 2012. Marine reptiles from Late Cretaceous (early Maastrichtian) deposits in Algarrobo, central Chile. Cretaceous Research 35:124-132 [P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132352: authorized by Philip Mannion, entered by Philip Mannion on 14.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Testudines -
Testudines indet. Batsch 1788 turtle
MPC.11003 (neural plate) and MPC.11002 (peripheral plate)
Chelonioidea indet. sea turtle
MPC.11001 (proximal portion of left humerus)
 Testudines - Dermochelyidae
cf. Dermochelyidae indet. Lydekker 1889 leatherback
SGO.PV.6573 (associated remains including incomplete left scapula, right ilium and right pubis)
 Squamata - Mosasauridae
Mosasauridae indet. Gervais 1852 mosasaur
SGO.PV.6570 (one isolated tooth) and SGO.PV.6571 (three isolated crowns)
 Sauropterygia -
Plesiosauria indet. plesiosaur
SGO.PV.6638 (incomplete left propodial)
 Sauropterygia - Elasmosauridae
Elasmosauridae indet. Cope 1869 elasmosaur
SGO.PV.90 (21 articulated vertebrae) and SGO.PV.6572 (17 isolated teeth)