Letrero Formation
Geologic formation in Ecuador
The Letrero Formation is a Late Miocene (Mayoan to Montehermosan in the SALMA classification) geologic formation in south-central Ecuador. The formation comprises lacustrine sediments with strong fluvial clastic input and contains siltstones and fine-grained sandstones.
01Fossil content
Mammals
| Mammals of the Letrero Formation | |||||
|---|---|---|---|---|---|
| Genus | Species | Location | Material | Notes | Images |
| Litopterna | Indeterminate | RHM Locality 4 | A litoptern. | ||
| Caviomorpha | Indeterminate | A caviomorph rodent. | |||
| Nabondasypus | Nabondasypus maddeni | Nabón basin | Several osteoderms. | An armadillo. | |
| Anadasypus | A. aequatorianus | RHM Locality 4 | A member of cingulata. | ||
| Toxodontia | Indeterminate | A toxodont. | |||
Sources and credits
This article is adapted from the Wikipedia article “Letrero Formation”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Nabondasypus maddeni (holotype, EPNPv-6381 - mobile osteoderms).png by Daniel Barasoain, CC0
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