Pleuromeris tridentata
Pleuromeris tridentata, or the three-toothed cardita, is a species of bivalve mollusc in the family Carditidae. It can be found along the Atlantic coast of North America, ranging from North Carolina to Florida.

Chase G. Mayers · 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
- PleuromerisPBDB
- Diet
- suspension feederPBDB, for Pleuromeris
- Life habit
- semi-infaunalPBDB, for Pleuromeris
- Motility
- facultatively mobilePBDB, for Pleuromeris
- Vision
- blindPBDB, for Crassatelloidea
- Environment
- marinePBDB, for Crassatelloidea
Time the record covers
At least 2.4 million years on record.
The record covers at least 2.58 Mya to 129 ka. No occurrence read is dated outside 5.333 Mya to 11.7 ka.
49 occurrences of Pleuromeris tridentata 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
49 occurrences- Pliocene17%
- Pleistocene83%
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
11 formations
- Waccamaw Formation10
- Caloosahatchee Formation6
- Duplin Formation5
- Pamlico Formation5
- Fort Thompson Formation4
- Bermont Formation3
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The named rock units Pleuromeris tridentata has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 occurrences have no formation on record, which is common for older literature.
Pleuromeris tridentata and its relatives
PleistoceneWhere Pleuromeris tridentata and its relatives were recorded in the Pleistocene.
Found in the same rock
1,138 taxa- Nucula (Nucula) proxima19 sites
- Crassinella lunulata18 sites
- Parvilucina multistriata17 sites
- Anadara (Larkinia) transversa15 sites
- Anomia simplex15 sites
- Mulinia lateralis15 sites
- Plicatula gibbosa15 sites
- Timoclea grus15 sites
- Abra aequalis14 sites
- Mercenaria campechiensis14 sites
- Neverita duplicatus14 sites
- Oliva (Ispidula) sayana14 sites
- Chione cancellata13 sites
- Glycymeris americana13 sites
- Nuculana acuta13 sites
- Crepidula plana12 sites
- Diodora cayenensis12 sites
- Neoterebra dislocata12 sites
- Olivella mutica12 sites
- Arcopsis adamsi11 sites
- Conradostrea sculpturata11 sites
- Crepidula fornicata11 sites
- Dinocardium robustum11 sites
- Dosinia (Dosinidia) elegans11 sites
The Paleobiology Database records 25 sites for Pleuromeris tridentata, 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
15 references- Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions16
- Studies on the marine Pleistocene: Part II. The marine Pleistocene mollusks of eastern North America7
- Neogene Stratigraphy of the lower Coast Plain of the Carolinas4
- Neogene Biostratigraphy of the Charlotte Harbor Area in Southwestern Florida4
- Mollusca from the Miocene and Lower Pliocene of Virginia and North Carolina. Part 1. Pelecypoda4
- The Pleistocene molluscan fauna from Leisley Shell Pit 1, Hillsborough County, Florida3
- Pleistocene (Rancholabrean) vertebrate faunas from coastal Georgia2
- Geology of the Coastal Plain of South Carolina2
- Mollusca: Fort Thompson Formation (Late Pleistocene)1
- The fauna and paleoecology of the Late Pleistocene marine sediments of southeastern Virginia1
- Mollusca of the "Glades" unit in southern Florida: Part I Introduction and observations1
- Stratigraphy and paleontology of the Late Neogene strata of the Caloosahatchee River area of southern Florida1
Each of the 49 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. 3 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 content2
Picture of Pleuromeris tridentata
- Source
- Wikipedia/Commons
- Credit
- Chase G. Mayers
- Licence
- CC BY 4.0
- Commercial use
- the licence allows it
CT scan
- Source
- MorphoSource
- Licence
- In Copyright
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- Pleuromeris tridentata · fmnh:invertebrate zoology:208336
Smithsonian Open Access was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- 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 itPleuromeris through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Say 1826)