Pseudoperna

Pseudoperna is a genus of extinct very small oysters. Pseudoperna lived in tight groups. This small oyster is commonly found attached in groups to the shell of large species such as Inoceramus. Pycnodonte and Pseudoperna are preserved mostly as calcitic valves and are also found attached to Mytiloides.

No picture of Pseudoperna was found. Wikipedia, Wikidata and iDigBio were searched and had none. Smithsonian Open Access did not answer, so this is what the others held rather than everything there is. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Pseudoperna, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
LophinaePBDB
Diet
suspension feederPBDB, for Ostreidae
Life habit
epifaunalPBDB, for Ostreidae
Motility
stationary, attachedPBDB, for Ostreidae
Vision
blindPBDB, for Bivalvia
Environment
hypersaline,marine,brackishPBDB, for Ostreidae

Time the record covers

At least 21 million years on record.

The record covers at least 93.9 Mya to 72.2 Mya. No occurrence read is dated outside 100.5 Mya to 66 Mya.

Early Cretaceous — about 0 of 76 occurrencesLate Cretaceous — about 76 of 76 occurrencesLate CretaceousPaleocene — about 0 of 76 occurrences101–100 Mya — about 0.2 occurrences100–99 Mya — about 0.5 occurrences99–98 Mya — about 0.5 occurrences98–96 Mya — about 0.5 occurrences96–95 Mya — about 0.5 occurrences95–94 Mya — about 0.5 occurrences94–93 Mya — about 5 occurrences93–92 Mya — about 6 occurrences92–90 Mya — about 6 occurrences90–89 Mya — about 6 occurrences89–88 Mya — about 7 occurrences88–87 Mya — about 7 occurrences87–86 Mya — about 7 occurrences86–84 Mya — about 10 occurrences84–83 Mya — about 7 occurrences83–82 Mya — about 0.4 occurrences82–81 Mya — about 0.4 occurrences81–80 Mya — about 0.4 occurrences80–78 Mya — about 0.4 occurrences78–77 Mya — about 0.4 occurrences77–76 Mya — about 0.4 occurrences76–75 Mya — about 0.4 occurrences75–74 Mya — about 0.4 occurrences74–72 Mya — about 0.4 occurrences72–71 Mya — about 1 occurrence71–70 Mya — about 2 occurrences70–69 Mya — about 2 occurrences69–68 Mya — about 2 occurrences68–67 Mya — about 2 occurrences67–65 Mya — about 0.7 occurrences93.9 Mya72.2 Mya101.2 Mya65.3 Mya

76 occurrences of Pseudoperna 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

76 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

12 formations

Mancos Shale — 36.35°N, 109.82°WMancos Shale — 35.73°N, 110.82°WMancos Shale — 36.18°N, 109.88°WMancos Shale — 40.76°N, 108.89°WMancos Shale — 35.78°N, 106.94°WNiobrara — 38.72°N, 100.18°WNiobrara — 36.35°N, 104.79°WNiobrara — 36.74°N, 104.17°WNiobrara — 36.35°N, 104.60°WNiobrara — 38.27°N, 104.61°WNiobrara — 42.60°N, 97.27°WNiobrara — 38.72°N, 100.70°WNiobrara — 40.20°N, 105.23°WNiobrara — 38.00°N, 100.25°WNiobrara — 38.84°N, 104.88°WCorsicana Marl — 31.30°N, 96.90°WColeraine — 47.32°N, 93.28°WColeraine — 47.00°N, 93.00°WColeraine — 47.29°N, 93.43°WGreenhorn Limestone — 38.28°N, 104.72°WAguja — 29.83°N, 103.25°WWapiabi — 52.79°N, 116.86°WCarlile Shale — 39.08°N, 99.24°WCarlile Shale — 39.05°N, 99.03°WNeylandville Marl — 33.37°N, 95.69°WCajamarca-Celendin — 5.48°S, 78.52°WBlackstone — 50.74°N, 113.85°WPierre Shale — 40.06°N, 106.39°W

Loading coastlines…

The named rock units Pseudoperna has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.

Pseudoperna and its relatives

Late Cretaceous

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

Found in the same rock

315 taxa

The Paleobiology Database records 76 sites for Pseudoperna, 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

21 references

Each of the 76 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. 9 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 content0

No picture of Pseudoperna was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Pseudoperna, or no answer at all. This entry cannot say which.

No 3D scan of Pseudoperna was found in MorphoSource and Sketchfab.

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 itLophinae through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Logan 1899