Earth:Los Alamitos Formation
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| Los Alamitos Formation Stratigraphic range: Late Campanian-Maastrichtian ~85–66 Ma | |
|---|---|
| Type | Geological formation |
| Sub-units | Coli Toro Member |
| Lithology | |
| Primary | Siltstone |
| Other | Sandstone |
| Location | |
| Coordinates | [ ⚑ ] : 42°06′S 66°18′W / 42.1°S 66.3°W |
| Paleocoordinates | [ ⚑ ] 45°00′S 52°18′W / 45.0°S 52.3°W |
| Region | Río Negro Province |
| Country | Argentina |
| Extent | North Patagonian Massif |
  Los Alamitos Formation (Argentina) | |
The Los Alamitos Formation is a geological formation of the North Patagonian Massif in Rio Negro Province, northwestern Patagonia, Argentina, whose strata date back to the Late Cretaceous (Late Campanian to Maastrichtian). Dinosaur remains are among the fossils that have been recovered from the formation.[1]
Fossil content
Dinosaurs
| Genus | Species | Material | Notes | Images |
|---|---|---|---|---|
| Aeolosaurus | A. rionegrinus | A titanosaur. |  | |
| Alamitornis | A. minutus | An ornithuromorph. | ||
| Huallasaurus | H. australis | "Partial skulls with associated postcrania, approximately [five] individuals." | A hadrosaur formally named "Kritosaurus" australis. |  |
| cf. Hesperornithes | ||||
| Indeterminate theropod | ||||
| Indeterminate ornithurine | ||||
| Indeterminate avian |
Rhynchocephalians
| Genus | Species | Material | Notes | Images |
|---|---|---|---|---|
| Alamitosphenos | A. mineri | |||
| Kawasphenodon | K. expectatus |
Snakes
| Genus | Species | Material | Notes | Imaes |
|---|---|---|---|---|
| Alamitophis | A. argentinus |
Mammaliaforms
| Genus | Species | Material | Notes | Images |
|---|---|---|---|---|
| Alamitherium | A. bishopi | |||
| Austrotriconodon | A. sepulvedai | |||
| A. mckennai | ||||
| Leonardus | L. cuspidatus | |||
| Bondesius | B. ferox | |||
| Brandonia | B. intermedia | |||
| Casamiquelia | C. rionegrina | |||
| Ferugliotherium | F. windhauseni | |||
| Gondwanatherium | G. patagonicum | |||
| Groebertherium | G. novasi | |||
| Mesungulatum | M. houssayi | |||
| Paraungulatum | P. rectangularis | |||
| Reigitherium | R. bunodontum | |||
| Rougiertherium | R. tricuspes |
See also
- List of dinosaur-bearing rock formations
References
- ↑ Weishampel et al., 2004, "Dinosaur distribution (Late Cretaceous, South America).", pp.600-604
- ↑ Rozadilla, Sebastián; Brissón-Egli, Federico; Lisandro Agnolín, Federico; Aranciaga-Rolando, Alexis Mauro; Novas, Fernando Emilio (2022). "A new hadrosaurid (Dinosauria: Ornithischia) from the Late Cretaceous of northern Patagonia and the radiation of South American hadrosaurids". Journal of Systematic Palaeontology 19 (17): 1207–1235. doi:10.1080/14772019.2021.2020917. https://www.tandfonline.com/doi/full/10.1080/14772019.2021.2020917.
- ↑ Prieto–Marquez, Alberto; Salinas, Guillermo C. (2010). "A re–evaluation of Secernosaurus koerneri and Kritosaurus australis (Dinosauria, Hadrosauridae) from the Late Cretaceous of Argentina". Journal of Vertebrate Paleontology 30 (3): 813–837. doi:10.1080/02724631003763508. Bibcode: 2010JVPal..30..813P.
- ↑ "Table 20.1," in Weishampel, et al.
- ↑ Agnolín, F. L.; Aranciaga Rolando, A. M.; Chimento, N. R.; Novas, F. E. (2023). "New small reptile remains from the Late Cretaceous of Patagonia increase morphological diversity of sphenodontids (Lepidosauria)". Proceedings of the Geologists' Association 135: 36–44. doi:10.1016/j.pgeola.2023.09.007.
- ↑ Apesteguía, Sebastián (2005-12-01). "A Late Campanian sphenodontid (Reptilia, Diapsida) from northern Patagonia" (in en). Comptes Rendus Palevol 4 (8): 663–669. doi:10.1016/j.crpv.2005.06.003. ISSN 1631-0683. Bibcode: 2005CRPal...4..663A.
- ↑ Bonaparte, 1999
- ↑ Bonaparte & Soria, 1985
- ↑ Bonaparte, 1990
Bibliography
- Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, https://books.google.com/books?id=vtZFDb_iw40C, retrieved 2019-02-21
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