San Ricardo Formation
19 distinct taxa, from 19 fossil occurrences the Paleobiology Database records under this name, spanning 155–149 Mya.
Chiapas · MX
19 taxa · 19 fossils · 155–149 MyaMacrostrat dates this rock 155–113 Ma. Macrostrat’s own record
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1 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Ceratomya
- Eocallista (Eocallista) brongniarti
- Eocallista pulchella
- Gresslya
- Harpagodes oceani
- Inoperna perplicata
- Lucina radiata
- Mesomiltha portlandica
- Natica hemispherica
- Nerinea gachupinae
- Nuculana
- Placunopsis
- Pleuromya tellina
- Protocardia dufrenoyca
- Protocardia pesolina
- Ptychomya stantoni
- Purpuroidea acatlana
- Tancredia (Tancredia) subcurtansata
- Xestosina subsella
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.