Exogyra

Searched as Exogyra columbella levis. The Paleobiology Database treats Exogyra as the accepted name.

Exogyra is an extinct genus of marine oysters that belongs to the family Gryphaeidae. These bivalves were cemented by the more cupped left valve. The right valve is flatter, and the beak is curved to one side. Exogyra lived on solid substrates in warm seas during the Jurassic and Cretaceous periods.

Exogyra

Wilson44691 · Public Domain · 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
ExogyrinaePBDB
Diet
suspension feederPBDB, for Gryphaeidae
Life habit
epifaunalPBDB, for Gryphaeidae
Motility
stationary, attachedPBDB, for Gryphaeidae
Vision
blindPBDB, for Bivalvia
Environment
marine,brackishPBDB, for Ostreida

Time the record covers

At most 6.6 million years on record.

The one occurrence read is dated to somewhere between 100.5 Mya and 93.9 Mya, which is a dating window rather than a span.

Early Cretaceous — about 0 of 1 occurrenceLate Cretaceous — about 1 of 1 occurrenceLate Cretaceous101–100 Mya — about 0.0 occurrences100–100 Mya — about 0.0 occurrences100–100 Mya — about 0.0 occurrences100–100 Mya — about 0.0 occurrences100–99 Mya — about 0.0 occurrences99–99 Mya — about 0.0 occurrences99–99 Mya — about 0.0 occurrences99–99 Mya — about 0.0 occurrences99–98 Mya — about 0.0 occurrences98–98 Mya — about 0.0 occurrences98–98 Mya — about 0.0 occurrences98–98 Mya — about 0.0 occurrences98–97 Mya — about 0.0 occurrences97–97 Mya — about 0.0 occurrences97–97 Mya — about 0.0 occurrences97–97 Mya — about 0.0 occurrences97–96 Mya — about 0.0 occurrences96–96 Mya — about 0.0 occurrences96–96 Mya — about 0.0 occurrences96–96 Mya — about 0.0 occurrences96–95 Mya — about 0.0 occurrences95–95 Mya — about 0.0 occurrences95–95 Mya — about 0.0 occurrences95–95 Mya — about 0.0 occurrences95–94 Mya — about 0.0 occurrences94–94 Mya — about 0.0 occurrences94–94 Mya — about 0.0 occurrences94–94 Mya — about 0.0 occurrences101 Mya93.4 Mya

1 occurrence of Exogyra on record, most of them in the Late Cretaceous. 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 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

Kaskapau — 55.88°N, 120.17°W

Loading coastlines…

The named rock units Exogyra has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Exogyra and its relatives

Late Cretaceous

Where Exogyra and its relatives were recorded in the Late Cretaceous.

Found in the same rock

1,242 taxa

The Paleobiology Database records 872 sites for Exogyra, and this reads 240 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

1 reference

Each of the 1 occurrence 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content2

Picture of Exogyra

Credit
Wilson44691
Licence
Public Domain
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC0 Public Domain
Commercial use
the licence allows it

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 itExogyrinae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Say 1820)