Anzaldo Formation
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The Anzaldo Formation is a Katian geologic formation of central Bolivia. The formation belongs to the Cochabamba Group, overlies the Capinota Formation and is overlain by the San Benito Formation. The formation is famous for being where Sacabambaspis, a jawless fish that has become a popular internet meme in recent years, was discovered.
Fossil content
The formation has provided the following fossils:
Fish
Pteraspidomorphi
- Huemacaspis bistrami
- Sacabambaspis janvieri
Trilobites
- Leiostegina inexpectans
Bivalves
- ?Grammysia sp.
- ?Modiomorpha sp.
- ?Parallelodon sp.
- "Ctenodonta" sp.
- "Goniophorina" sp.
Gastropods
- Gyrospira tourteloti
Lingulida
- Bistramia elegans
- Dignomia munsterii
See also
- List of fossiliferous stratigraphic units in Bolivia
- Cancañiri Formation
- La Ciénega Formation
- Santiago Formation
Bibliography
- Pradel, A.; Sansom, I. J.; Gagnier, P.-Y.; Cespedes, R.; Janvier, P. (2007), "The tail of the Ordovician fish Scabambaspis", Biology Letters, 3 (1): 72–75, doi:, PMC , PMID
- Emig, C. C.; Herrera, Z. (2006), "Dignomia munsterii (Brachiopoda, Lingulata) from the Ordovician of Bolivia, with redescription of the genus", Geodiversitas, 28: 227–237
- Gagnier, P. Y.; Blieck, A.; Emig, C. C.; Sempere, T.; Vachard, D.; Vanguestaine, M. (1996), "New paleontological and geological data on the Ordovician and Silurian of Bolivia", Journal of South American Earth Sciences, 9 (5): 329–347, Bibcode:, doi:
- Branisa, L (1965), "Los fósiles guias de Bolivia: I. Paleozoico", Boletín de Servicio Geologico de Bolivia la Paz, Bolivia, 6: 1–282