Potomida

Potomida is a genus of bivalves belonging to the subfamily Gonideinae of the family Unionidae.

Potomida

David Perez · CC BY 3.0 · 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
UnionidaePBDB
Diet
suspension feederPBDB, for Bivalvia
Life habit
infaunalPBDB, for Bivalvia
Motility
facultatively mobilePBDB, for Bivalvia
Vision
blindPBDB, for Bivalvia
Environment
freshwaterPBDB, for Unionida

Time the record covers

At least 165 million years on record.

The record covers at least 168.2 Mya to 2.58 Mya. No occurrence read is dated outside 174.7 Mya to 774 ka.

Early Jurassic — about 0 of 7 occurrencesMiddle Jurassic — about 4 of 7 occurrencesLate Jurassic — about 0 of 7 occurrencesEarly Cretaceous — about 0 of 7 occurrencesLate Cretaceous — about 0 of 7 occurrencesPaleocene — about 0 of 7 occurrencesEocene — about 0 of 7 occurrencesOligocene — about 0 of 7 occurrencesMiocene — about 0 of 7 occurrencesPliocene — about 1 of 7 occurrencesPleistocene — about 2 of 7 occurrences178–172 Mya — about 0.2 occurrences172–166 Mya — about 3 occurrences166–160 Mya — about 0.4 occurrences5.9–0 Mya — about 3 occurrences168.2 Mya2.58 Mya178 Mya0 Mya

7 occurrences of Potomida on record, most of them in the Middle Jurassic. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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

7 occurrences

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

1 formation

Quemuoco — 33.33°N, 92.00°E

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The named rock units Potomida has been recovered from, largest first. Drawn where the rock is now, not where it formed. 4 occurrences have no formation on record, which is common for older literature.

Potomida and its relatives

Middle Jurassic

Where Potomida and its relatives were recorded in the Middle Jurassic.

Found in the same rock

32 taxa

The Paleobiology Database records 4 sites for Potomida, 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

4 references

Each of the 7 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 content2

Picture of Potomida

Credit
David Perez
Licence
CC BY 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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

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 itUnionidae through timeFormations of the Middle JurassicThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Swainson 1840