Isla Marambio (Cretaceous of Antarctica)

Where: Antarctica (64.2° S, 56.7° W: paleocoordinates 62.6° S, 67.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Pachydiscus ultimus ammonoid zone, Lopez de Bertodano Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Lopez de Bertodano Formation (‘‘molluscan units’’), unit ‘‘klb 9’’. Pachydiscus ultimus Biozone, upper Maastrichtian

•Lopez de Bertodano Formation is Late Maastricthian according to Crame et al. (2004)

• bed-level stratigraphic resolution

Environment/lithology: platform or shelf-margin reef; sandy shale

• mid- to outer platform setting
• sandy shales and sandstones with interbedded fine concretions and subordinate carbonate facies

Size class: macrofossils

Collected by B. Zinsmeister, M. Reguero and A. Carlini in 1989; reposited in the MLP

Primary reference: J. P. O'Gorman, Z. Gasparini, and L. Salgado. 2013. Postcranial morphology of Aristonectes (Plesiosauria, Elasmosauridae) from the Upper Cretaceous of Patagonia and Antarctica. Antarctic Science 25(1):71-82 [P. Mannion/P. Mannion/P. Mannion]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 140323: authorized by Philip Mannion, entered by Philip Mannion on 07.03.2013, edited by Graeme Lloyd

Creative Commons license: CC BY (attribution)

Taxonomic list

 Squamata - Mosasauridae
Kaikaifilu hervei n. gen. n. sp.
Kaikaifilu hervei n. gen. n. sp. Otero et al. 2017 mosasaur
 Sauropterygia - Elasmosauridae
Aristonectes cf. parvidens Cabrera 1941 elasmosaur
MLP 89-III-3-2 (partial, articulated postcranial skeleton of a juvenile comprising the first pre-pectoral vertebra, three pectoral vertebrae, four dorsal vertebrae, left and right coracoid, proximal portion of the left scapula, radius, ulna, radiale, intermedium, ulnare, distal carpal I, ribs)