Pitar
Pitar is a genus of saltwater clams, marine bivalve molluscs in the subfamily Callocardiinae of the family Veneridae, the Venus clams. The genus contains over 60 species.

Marie HENNION · 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
- CallocardiinaePBDB
- Diet
- suspension feederPBDB
- Life habit
- infaunalPBDB
- Motility
- facultatively mobilePBDB
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 93 million years on record.
The record covers at least 93.9 Mya to 11.7 ka. No occurrence read is dated outside 100.5 Mya to 0 Mya.
1,319 occurrences of Pitar on record, most of them in the Eocene. 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
1,319 occurrences- Late Cretaceousunder 1%
- Paleocene13%
- Eocene42%
- Oligocene12%
- Miocene16%
- Pliocene7%
- Pleistocene9%
- Holocene1%
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
279 formations
- Byram Formation · Vicksburg Group51
- Hatchetigbee Bluff Formation · Wilcox Group40
- Moodys Branch Formation · Jackson Group34
- Cook Mountain Formation · Claiborne Group34
- Kincaid Formation · Midway Group31
- Eugene Formation28
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The named rock units Pitar has been recovered from, largest first. Drawn where the rock is now, not where it formed. 255 further formations hold fewer occurrences each and are not listed. 160 occurrences have no formation on record, which is common for older literature.
Pitar and its relatives
EoceneWhere Pitar and its relatives were recorded in the Eocene.
Found in the same rock
3,358 taxa- Dentalium48 sites
- Turritella46 sites
- Tellina42 sites
- Ostrea40 sites
- Eburneopecten scintillatus36 sites
- Cadulus30 sites
- Chlamys30 sites
- Crassatella29 sites
- Bivalvia27 sites
- Corbula27 sites
- Gastropoda27 sites
- Caestocorbula wailesiana25 sites
- Nucula (Nucula) sphenopsis24 sites
- Solena (Eosolen) eugenensis24 sites
- Callista23 sites
- Calyptraea (Trochita) aperta23 sites
- Chama23 sites
- Glycymeris23 sites
- Nuculana23 sites
- Venericardia (Rotundicardia) diversidentata23 sites
- Callista annexa21 sites
- Corbula densata21 sites
- Tellinidae21 sites
- Calyptraphorus stamineus20 sites
The Paleobiology Database records 801 sites for Pitar, and this reads 240 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
279 references- Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Pteropoda, Scaphopoda and Cephalopoda106
- Resilience of marine invertebrate communities during the early Cenozoic hyperthermals71
- Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region47
- Testing for patterns of faunal persistence in the early Oligocene Byram Formation of Mississippi39
- Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions38
- Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi38
- The Oligocene marine molluscan fauna of the Eugene Formation in Oregon28
- Impact of lithification on the diversity, size distribution, and recovery dynamics of marine invertebrate assemblages25
- Environmental and biological controls on the diversity and ecology of Late Cretaceous through early Paleogene marine ecosystems in the US Gulf Coastal Plain24
- Stratigraphy and sedimentology of the Eocene Tejon Formation, western Tehachapi and San Emigdio mountains, California22
- Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (Pelecypods: Propeamussiidae to Cuspidariidae).22
- Miocene and Pliocene mollusks from Trinidad21
Each of the 1,319 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. 267 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 Pitar
- Source
- Wikipedia/Commons
- Credit
- Marie HENNION
- 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
- Pitar albidus · FMNH:Invertebrate Zoology:158478
The description on this site
- Source
- Wikipedia, “Pitar”
- 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 itCallocardiinae through timeFormations of the EoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Römer 1857)