Seymour Island: Late/Upper Maastrichtian, Antarctica
collected by B. Zinsmeister, M. Reguero and A. Carlini 1989

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Mosasauridae
Kaikaifilu hervei n. gen., n. sp. Otero et al. 2017
Otero et al. 2017 1 specimen
SGO.PV.6509, fragmentary skull and fragmentary humerus of a single specimen
Reptilia - Plesiosauria - Elasmosauridae
Aristonectes cf. parvidens Cabrera 1941
1 specimen
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), MLP 89-III-3-1 (gastroliths)
see common names

Geography
Country:Antarctica
Coordinates: 64.2° South, 56.7° West (view map)
Paleocoordinates:62.6° South, 67.3° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Late/Upper Maastrichtian Ammonoid zone: Pachydiscus ultimus
Age range of interval:72.10000 - 66.00000 m.y. ago
Stratigraphy
Formation:Lopez de Bertodano
Stratigraphic resolution:bed
Stratigraphy comments: 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)
Lithology and environment
Primary lithology: sandy "shale"
Lithology description: sandy shales and sandstones with interbedded fine concretions and subordinate carbonate facies
Environment:platform/shelf-margin reef
Geology comments: mid- to outer platform setting
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:MLP
Collectors:B. Zinsmeister, M. Reguero and A. Carlini Collection dates:1989
Metadata
Also known as:Isla Marambio
Database number:140323
Authorizer:P. Mannion, G. Lloyd Enterer:P. Mannion, G. Lloyd
Modifier:F. Aspromonte Research group:vertebrate
Created:2013-03-07 21:55:47 Last modified:2023-11-10 14:58:19
Access level:the public Released:2013-03-07 21:55:47
Creative Commons license:CC BY
Reference information

Primary reference:
45400. 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/F. Aspromonte]

Secondary references:

51487 J. A. Crame, J. E. Francis, D. J. Cantrill and D. Pirrie. 2004. Maastrichtian stratigraphy of Antarctica. Cretaceous Research 25:411-423 [R. Benson/R. Benson]
86420 J. P. O'Gorman. 2016. Argentinean plesiosaurs: a commented account of main records, systematic and biogeographical patterns and comments on future perspectives. In F. L. Agnolín, G. L. Lio, F. Brissón Egli, N. R. Chimento, F. E. Novas (eds.), Historia Evolutiva y paleobiogeográfica de los vertebrados de América del Sur (6)37-45 [E. Vlachos/F. Aspromonte]
86419 J. P. O'Gorman, E. B. Olivero, S. Santillana, M. J. Everhart, and M. Reguero. 2014. Gastroliths associated with an Aristonectes specimen (Plesiosauria, Elasmosauridae), López de Bertodano Formation (upper Maastrichtian) Seymour Island (Is. Marambio), Antarctic Peninsula. Cretaceous Research 50:228-237 [E. Vlachos/F. Aspromonte]
86379 J. P. O'Gorman, R. Otero, M. Reguero and Z. Gasparini. 2019. Cretaceous Antarctic plesiosaurs: stratigraphy, systematics and paleobiogeography. Advances in Polar Science 30(3):210-227 [E. Vlachos/F. Aspromonte]
66336 R. A. Otero, S. Soto-Acuna, D. Rubilar-Rogers and C. S. Gutstein. 2017. Kaikaifilu hervei gen. et sp. nov., a new large mosasaur (Squamata, Mosasauridae) from the upper Maastrichtian of Antarctica. Cretaceous Research 70:209-225 [G. Lloyd/G. Lloyd]