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
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Kaikaifilu hervei n. gen., n. sp.
Otero et al. 2017
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Otero et al. 2017 | 1 specimen | ||||||||
SGO.PV.6509, fragmentary skull and fragmentary humerus of a single specimen | ||||||||||
Reptilia
- Plesiosauria
- Elasmosauridae
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Aristonectes cf. parvidens
Cabrera 1941
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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] |