Phacoides
Phacoides is a genus of bivalves belonging to the family Lucinidae.

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
- LucininaePBDB
- Diet
- chemosymbioticPBDB, for Lucinidae
- Life habit
- deep infaunalPBDB, for Lucinidae
- Motility
- facultatively mobilePBDB, for Lucinidae
- Vision
- blindPBDB, for Bivalvia
Time the record covers
At least 72 million years on record.
The record covers at least 72.2 Mya to 129 ka. No occurrence read is dated outside 83.6 Mya to 11.7 ka.
221 occurrences of Phacoides on record, most of them in the Miocene. 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
221 occurrences- Late Cretaceous21%
- Paleocene6%
- Eocene8%
- Oligocene21%
- Miocene30%
- Pliocene8%
- Pleistocene7%
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
53 formations
- Providence Formation15
- Castilletes Formation14
- Suwannee Limestone Formation · Vicksburg Group13
- Arcadia Formation · Hawthorn Group13
- Nacatoch Sand Formation9
- Ameki Formation · Bende-Ameki Group9
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The named rock units Phacoides has been recovered from, largest first. Drawn where the rock is now, not where it formed. 29 further formations hold fewer occurrences each and are not listed. 54 occurrences have no formation on record, which is common for older literature.
Phacoides and its relatives
MioceneWhere Phacoides and its relatives were recorded in the Miocene.
Found in the same rock
2,581 taxa- Nuculana38 sites
- Corbula31 sites
- Cymbophora31 sites
- Cyprimeria30 sites
- Turritella29 sites
- Tellina27 sites
- Glycymeris25 sites
- Nucula24 sites
- Anomia argentaria22 sites
- Crassatella21 sites
- Cyclorisma21 sites
- Legumen ellipticum21 sites
- Ostrea21 sites
- Crassatella vadosa20 sites
- Granocardium20 sites
- Syncyclonema20 sites
- Striarca19 sites
- Veniella conradi19 sites
- Cardium18 sites
- Dentalium18 sites
- Anomia17 sites
- Cadulus17 sites
- Crenella serica17 sites
- Cubitostrea tecticosta17 sites
The Paleobiology Database records 161 sites for Phacoides, 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
60 references- Molluscs of the Tampa and Suwannee Limestones26
- Neogene molluscs, shallow marine paleoenvironments, and chronostratigraphy of the Guajira Peninsula, Colombia16
- Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain15
- Unpublished data on Cretaceous-Paleocene molluscan assemblages14
- Tertiary faunal horizons of western Washington12
- The larger invertebrate fossils of the Navarro group of Texas9
- Eocene Mollusca from Nigeria8
- The Molluscan Fauna of the Alum Bluff Group of Florida7
- Geological and paleontological relations, with a review of earlier investigations7
- A contribution to the invertebrate fauna of the Oligocene beds of Flint, River6
- Die Mollusken des Pliozäns von Boemiajoe (Java)5
- Tertiary molluscs from the western margin of Bengal Basin, India, with special reference to biostratigraphy and paleoenvironment4
Each of the 221 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. 48 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 Phacoides
- 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
- Phacoides pectinatus · FMNH:Invertebrate Zoology:288709
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
- Source
- Wikipedia, “Phacoides”
- 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 itLucininae through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Blainville 1825