Eastern slopes of the La Colonia area: Maastrichtian, Argentina
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia
- Serpentes
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Serpentes indet.
Linnaeus 1758
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1 specimen | |||||||||
MPEF-PV 642, trunk vertebra | ||||||||||
Reptilia
- Madtsoiidae
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Alamitophis argentinus
Albino 1986
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1 specimen | |||||||||
MPEF-PV 643, trunk vertebra | ||||||||||
? Madtsoiidae indet.
(Hoffstetter 1961)
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3 specimens | |||||||||
MPEF-PV 641, MPEFPV 644 and MPEF-PV 645, incomplete vertebrae | ||||||||||
= Eomadtsoia ragei
Gómez et al. 2019
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Gómez et al. 2019 | |||||||||
? Boidae indet.
Gray 1825
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4 specimens | |||||||||
MPEF-PV 646, MPEFPV 647, MPEF-PV 648 and MPEF-PV 649, incomplete vertebrae | ||||||||||
= Eomadtsoia ragei
Gómez et al. 2019
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Gómez et al. 2019 | |||||||||
Reptilia
- Plesiosauria
- Elasmosauridae
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Elasmosauridae indet.
Cope 1869
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Gasparini et al. 2001 | 2 elements | ||||||||
MPEF s/n, isolated and incomplete cervical and dorsal vertebrae | ||||||||||
see common names |
Geography
Country: | Argentina | State/province: | Chubut |
Coordinates: | 42.9° South, 67.5° West (view map) | ||
Paleocoordinates: | 45.2° South, 55.9° West | ||
Basis of coordinate: | stated in text |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
*Period: | Late/Upper Cretaceous - Late/Upper Cretaceous | *Epoch: | Campanian-Maastrichtian (minimum) |
Key time interval: | Maastrichtian | ||
Age range of interval: | 72.10000 - 66.00000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | La Colonia | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Fossil localities described from "second facies association of the La Colonia Formation.." (Albino, 2000:248). No further stratigraphic data provided.
La Colonia Fm = Maastrichtian (Clyde et al. 2021) |
Lithology and environment
Primary lithology: | not reported |
Environment: | estuary/bay |
Geology comments: Depositional environment described as "...estuary, tidal flat, or coastal plain environment, influenced both by occasional high fresh water stream flow from the continent and tidal occurrences from the sea..." (Albino, 2000:249). |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | poor |
Articulated whole bodies: | none |
Disassociated major elements: | all |
Fragmentation: | frequent |
Bioerosion: | none |
Encrustation: | none |
Collection methods and comments
Collection excludes: | some macrofossils,some microfossils |
Collection methods: | field collection,survey of museum collection,observed (not collected) |
Collection size: | 9 specimens |
Reason for describing collection: | general faunal/floral analysis |
Museum repositories: | MEF |
Taxonomic list comments:Additional taxa listed from second facies include: fishes, turtles, crocodiles, plesiosaurs, dinosaurs, mammals. No additional information is provided. |
Metadata
Database number: | 26749 | ||
Authorizer: | J. Head, P. Mannion, E. Vlachos | Enterer: | J. Head, F. Aspromonte, J. Tennant |
Modifier: | F. Aspromonte | Research group: | vertebrate |
Collections that are a subset of this one: | |||
Created: | 2002-10-27 14:45:08 | Last modified: | 2024-01-11 08:43:43 |
Access level: | the public | Released: | 2002-10-27 14:45:08 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
7376. | A. M. Albino. 2000. New record of snakes from the Cretaceous of Patagonia (Argentina). Geodiversitas 22(2):247-253 [J. Head/J. Head/P. Mannion] |
Secondary references:
49730 | L. C. Gaetano, C. A. Marsicano, and G. W. Roughier. 2013. A revision of the putative Late Cretaceous triconodonts from South America. Cretaceous Research 46:90-100 [P. Mannion/J. Tennant] | |
46158 | Z. Gasparini, S. Casadio, M. Fernandez and L. Salgado. 2001. Marine reptiles from the Late Cretaceous of northern Patagonia. Journal of South American Earth Sciences 14(1):51-60 [P. Mannion/J. Tennant/F. Aspromonte] | |
71150 | R. O. Gómez, F. F. Garberoglio, and G. W. Rougier. 2019. A new Late Cretaceous snake from Patagonia: Phylogeny and trends in body size evolution of madtsoiid snakes. Comptes Rendus Palevol 18(7):771-781 [P. Mannion/P. Mannion/F. Aspromonte] |