SW corner, Seymour Island (Bed 3): Early/Lower Maastrichtian, Antarctica
collected by P. Rial, J. C. Muñoz, R. T. Berté, A. Maisterrena and V. Melemenis 1982
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Reptilia
- Plesiosauria
- Elasmosauridae
|
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Elasmosauridae indet.
Cope 1869
|
1 individual | |||||||||
| MLP 82-I-28-1, an incomplete skeleton comprising 15 cervical, three pectorals, 21 dorsal, three sacral, and 22 caudal vertebrae, an almost complete left hind limb, some dorsal ribs, incomplete coracoids and fragments of the scapulae | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Antarctica |
| Coordinates: | 64.3° South, 56.9° West (view map) |
| Paleocoordinates: | 62.6° South, 67.4° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Early/Lower Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | López de Bertodano | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: López de Betodano Formation, approximately ‘unit 3’ of Macellari (1986). Early Maastrichtian, C31R (Bowman et al. 2014, Milanese et al. 2019). | |||||
Lithology and environment
| Primary lithology: | burrows,shelly/skeletal,gray poorly lithified sandy siltstone |
| Secondary lithology: | poorly lithified sandstone |
| Includes fossils? | Y |
| Lithology description: Clastic (poorly consolidated sandstones and siltstones) and richly fossiliferous formation representing shallow shelf marine to coastal deltaic facies. The rocks from which the bones were collected consist of gray sandy siltstones with scarce annelid worm tubes and poorly preserved gastropod and bivalve shells. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Articulated whole bodies: | some |
| Associated major elements: | many |
| Disassociated major elements: | many |
| Disassociated minor elements: | many |
| Fragmentation: | occasional |
| Bioerosion: | none |
| Encrustation: | occasional |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection excludes: | some macrofossils | ||
| Collection methods: | selective quarrying,surface (in situ),mechanical,field collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Museum repositories: | MLP | ||
| Collectors: | P. Rial, J. C. Muñoz, R. T. Berté, A. Maisterrena and V. Melemenis | Collection dates: | 28 January 1982 |
| Collection method comments: This specimen (MLP 82-I-28-1) was embedded in permafrost, which made extraction very difficult. | |||
Metadata
| Also known as: | Elasmosaur locality | ||
| Database number: | 232362 | ||
| Authorizer: | E. Vlachos | Enterer: | F. Aspromonte |
| Modifier: | F. Aspromonte | Research group: | vertebrate |
| Subset of collection #: | 3125 | ||
| Created: | 2023-11-10 12:43:12 | Last modified: | 2023-11-10 12:45:42 |
| Access level: | the public | Released: | 2023-11-10 12:43:12 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 9685. | Z. Gasparini, F. Del Valle, and R. Goñi. 1984. An elasmosaur (Reptilia, Plesiosauria) of the Upper Cretaceous in the Antarctic. Contribuciones del Instituto Antártico Argentino 305:1-24 [J. Alroy/E. Leckey/F. Aspromonte] |
Secondary references:
| 86414 | J. P. O'Gorman, F. R. Aspromonte, and M. Reguero. 2021. New data on one of the first plesiosaur (Reptilia, Sauropterygia) skeletons recovered from Antarctica, with comments on the dorsal sacral and regions of elasmosaurids. Alcheringa 45(3):354-368 [E. Vlachos/F. Aspromonte] |