Pliocardia
Pliocardia is a genus of saltwater clams, marine bivalve molluscs in the family Vesicomyidae.

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
- PliocardiinaePBDB
- Diet
- suspension feederPBDB, for Glossoidea
- Life habit
- infaunalPBDB, for Glossoidea
- Motility
- facultatively mobilePBDB, for Glossoidea
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 40 million years on record.
The record covers at least 41.03 Mya to 129 ka. No occurrence read is dated outside 48.07 Mya to 11.7 ka.
10 occurrences of Pliocardia on record, most of them in the Oligocene. 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
10 occurrences- Eocene10%
- Oligocene50%
- Miocene10%
- Pliocene20%
- Pleistocene10%
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
5 formations
- Lincoln Creek Formation3
- Bowden Formation · Coastal Group2
- Humptulips Formation1
- Kurosedani Formation1
- Makah Formation1
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The named rock units Pliocardia has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.
Pliocardia and its relatives
OligoceneWhere Pliocardia and its relatives were recorded in the Oligocene.
Found in the same rock
597 taxa- Anadara2 sites
- Bathymodiolus willapaensis2 sites
- Chiton alveolus2 sites
- Conchocele bisecta2 sites
- Eulimidae2 sites
- Limopsis2 sites
- Merisca2 sites
- Nucinella2 sites
- Pleurophopsis chinookensis2 sites
- Poromya2 sites
- Retiskenea statura2 sites
- Scaphandridae2 sites
- Solariella2 sites
- Solemyidae2 sites
- "Arca" umbonata morantensis1 site
- "Arca" yaquensis berryi1 site
- Abra (Abra)1 site
- Abra (Abra) triangulata1 site
- Acar domingensis1 site
- Acharax1 site
- Acila (Acila) submirabilis1 site
- Acmaea1 site
- Acmaturris brisis1 site
- Acmaturris comparata1 site
The Paleobiology Database records 8 sites for Pliocardia, and this reads all of them. 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
8 references- New taxa, records, and data for vesicomyid bivalves from Cenozoic strata of the North Pacific region3
- Chemosymbiotic Bivalves from the Lower Miocene Kurosedani Formation in Toyama Prefecture, Central Honshu, Japan1
- Discovery of an Extensive Deep-Sea Fossil Serpulid Reef Associated with a Cold Seep, Santa Monica Basin, California1
- Thyasirid bivalves from Cretaceous and Paleogene cold seeps1
- Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions1
- Fossil Vesicomyid Bivalves from the North Pacific Region1
- Miocene Molluscs from Bowden, Jamaica. Part 1: Pelecypods and Scaphopods1
- A contribution to the paleontology of Trinidad1
Each of the 10 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. 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 Pliocardia
- Source
- Wikipedia/Commons
- Credit
- Manuel CABALLER
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
No 3D scan of Pliocardia 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, “Pliocardia”
- 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 itPliocardiinae through timeFormations of the OligoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Woodring 1925