Petricola
Petricola is a genus of saltwater clams, marine bivalve molluscs in the subfamily Petricolinae of the family Veneridae, the Venus clams.

Manuel CABALLER · CC BY 4.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.
On record
Recorded, not inferred- Sits inside
- PetricolinaPBDB
- Diet
- suspension feederPBDB
- Life habit
- boringPBDB
- Motility
- stationaryPBDB
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 100 million years on record.
The record covers at least 100.5 Mya to 11.7 ka. No occurrence read is dated outside 113.2 Mya to 0 Mya.
160 occurrences of Petricola on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. Bar height is expected occurrences, not a count: each fossil is spread across the span it is dated to, so a tall narrow bar means tight dating and a low wide one means loose.
When
160 occurrences- Early Cretaceous1%
- Paleoceneunder 1%
- Eocene1%
- Miocene9%
- Pliocene9%
- Pleistocene74%
- Holocene5%
These are dates about fossils, not the animal: the record can only begin after it arose and end before it died out, so either end may reach further. Shares are expected occurrences: a fossil dated to a span is counted partly in each period it straddles. More on what this infers.
Found in
41 formations
- Palos Verdes Sand Formation24
- Unnamed Formation6
- Pamlico Formation6
- Choptank Formation · Chesapeake Group5
- Waccamaw Formation4
- Palos Verdes Formation4
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The named rock units Petricola has been recovered from, largest first. Drawn where the rock is now, not where it formed. 17 further formations hold fewer occurrences each and are not listed. 61 occurrences have no formation on record, which is common for older literature.
Petricola and its relatives
PleistoceneWhere Petricola and its relatives were recorded in the Pleistocene.
Found in the same rock
2,247 taxa- Crassinella lunulata14 sites
- Epilucina californica14 sites
- Lucinisca nuttalli14 sites
- Abra aequalis13 sites
- Cryptomya californica13 sites
- Alia carinata12 sites
- Antisabia panamensis12 sites
- Callianax biplicata12 sites
- Chama arcana12 sites
- Diodora aspera12 sites
- Hiatella arctica12 sites
- Leukoma staminea12 sites
- Nutricola tantilla12 sites
- Petricolaria pholadiformis12 sites
- Californiconus californicus11 sites
- Cumingia californica11 sites
- Glans carpenteri11 sites
- Littorina (Littorina) scutulata11 sites
- Lottia scabra11 sites
- Nucula (Nucula) proxima11 sites
- Amphissa versicolor10 sites
- Angulus texanus10 sites
- Astyris lunata10 sites
- Balanus10 sites
The Paleobiology Database records 103 sites for Petricola, and this reads all of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. The number is how many of those sites it was catalogued from too. The 24 sharing the most are listed.
This is not a list of everything alive at the time. It is only what has come out of the same ground as this animal and been written down.
Entered from
71 references- Studies on the marine Pleistocene: Part II. The marine Pleistocene mollusks of eastern North America17
- The Paleontology and Stratigraphy of the Marine Pliocene and Pleistocene of San Pedro, California10
- Late Pleistocene invertebrates of the Newport Bay area, California7
- Paleoecologic analysis and age of a late Pleistocene fossil assemblage from Upper Newport Bay, Newport Beach, Orange County, California6
- Geology of San Nicolas Island, California6
- Mollusca from the Miocene and Lower Pliocene of Virginia and North Carolina. Part 1. Pelecypoda6
- The paleontology of the Pleistocene molluscan fauna of the Newport Bay area, California5
- Unpublished notes on Caribbean collection of Jack and Winifred Gibson-Smith, Naturhistorisches Museum Basel4
- Late Pleistocene Invertebrates from Punta Cabras, Baja California, Mexico4
- Paleontology of the Pleistocene of Point Loma, San Diego County, California4
- Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America3
- The fauna and paleoecology of the Late Pleistocene marine sediments of southeastern Virginia3
Each of the 160 occurrences read was entered from one of these publications, ordered by how many each accounts for. This is not a search for papers mentioning the name. 59 further references are not listed. Entries link to doi.org where the Paleobiology Database holds an identifier, and to its own record where it does not. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Petricola
- Source
- Wikipedia/Commons
- Credit
- Manuel CABALLER
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan of Petricola was found in Sketchfab.
Smithsonian Open Access and MorphoSource were not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Petricola”
- Licence
- CC BY-SA 4.0
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itPetricolina through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Lamarck 1801