Poromyidae

Poromyidae is a family of saltwater clams, marine bivalve molluscs in the order Anomalodesmata. The genus Dilemma, described in 2008, is remarkable for being a predator of copepods, which is very unusual for a sessile mollusc.

Poromyidae

Uncredited · 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
PoromyoideaPBDB
Diet
carnivorePBDB
Life habit
infaunalPBDB
Motility
facultatively mobilePBDB
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 118 million years on record.

The record covers at least 119.57 Mya to 774 ka. No occurrence read is dated outside 121.4 Mya to 129 ka.

Early Cretaceous — about 24 of 405 occurrencesEarly CretaceousLate Cretaceous — about 333 of 405 occurrencesLate CretaceousPaleocene — about 2 of 405 occurrencesEocene — about 21 of 405 occurrencesEoceneOligocene — about 2 of 405 occurrencesOligoceneMiocene — about 7 of 405 occurrencesMiocenePliocene — about 11 of 405 occurrencesPleistocene — about 5 of 405 occurrences124–120 Mya — about 2 occurrences120–116 Mya — about 1.0 occurrences116–111 Mya — about 5 occurrences111–107 Mya — about 7 occurrences107–103 Mya — about 6 occurrences103–99 Mya — about 11 occurrences99–95 Mya — about 20 occurrences95–91 Mya — about 34 occurrences91–87 Mya — about 15 occurrences87–83 Mya — about 12 occurrences83–78 Mya — about 25 occurrences78–74 Mya — about 25 occurrences74–70 Mya — about 72 occurrences70–66 Mya — about 121 occurrences66–62 Mya — about 1 occurrence62–58 Mya — about 1 occurrence58–54 Mya — about 1 occurrence54–50 Mya — about 2 occurrences50–45 Mya — about 5 occurrences45–41 Mya — about 8 occurrences41–37 Mya — about 4 occurrences37–33 Mya — about 2 occurrences29–25 Mya — about 1 occurrence25–21 Mya — about 0.8 occurrences17–12 Mya — about 5 occurrences12–8.3 Mya — about 1 occurrence8.3–4.1 Mya — about 4 occurrences4.1–0 Mya — about 13 occurrences119.57 Mya774 ka124 Mya0 Mya

405 occurrences of Poromyidae on record, most of them in the Late Cretaceous. 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

405 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

94 formations

Prairie Bluff — 34.51°N, 88.92°WPrairie Bluff — 34.25°N, 88.97°WPrairie Bluff — 33.90°N, 88.98°WPrairie Bluff — 33.79°N, 88.97°WPrairie Bluff — 33.79°N, 88.91°WPrairie Bluff — 33.72°N, 88.90°WPrairie Bluff — 33.50°N, 88.81°WPrairie Bluff — 33.05°N, 88.56°WPrairie Bluff — 32.90°N, 88.46°WPrairie Bluff — 32.74°N, 88.36°WPrairie Bluff — 32.70°N, 88.17°WPrairie Bluff — 32.61°N, 88.24°WPrairie Bluff — 32.43°N, 88.04°WPrairie Bluff — 32.39°N, 87.92°WPrairie Bluff — 32.31°N, 87.80°WPrairie Bluff — 32.23°N, 87.50°WPrairie Bluff — 32.14°N, 87.42°WPrairie Bluff — 32.07°N, 87.33°WPrairie Bluff — 32.04°N, 87.26°WPrairie Bluff — 32.04°N, 86.78°WPrairie Bluff — 31.97°N, 86.72°WPrairie Bluff — 32.00°N, 86.48°WPrairie Bluff — 31.98°N, 86.00°WPrairie Bluff — 31.99°N, 85.92°WNacatoch Sand — 32.10°N, 96.47°WNacatoch Sand — 32.59°N, 96.31°WNacatoch Sand — 33.19°N, 95.22°WNacatoch Sand — 33.14°N, 96.11°WNacatoch Sand — 32.05°N, 96.41°WProvidence — 31.91°N, 86.17°WProvidence — 31.97°N, 86.00°WProvidence — 31.89°N, 85.70°WProvidence — 31.95°N, 85.68°WProvidence — 31.92°N, 85.35°WProvidence — 31.94°N, 86.11°WProvidence — 31.84°N, 85.22°WProvidence — 31.78°N, 85.14°WProvidence — 31.73°N, 85.12°WProvidence — 31.80°N, 85.00°WProvidence — 31.89°N, 85.21°WCotinguiba — 10.76°S, 37.07°WCotinguiba — 10.86°S, 37.15°WMerchantville — 39.54°N, 75.72°WMerchantville — 39.95°N, 74.99°WOwl Creek — 34.74°N, 88.90°WOwl Creek — 34.78°N, 88.89°WOwl Creek — 37.00°N, 89.85°WOwl Creek — 37.00°N, 89.87°WOwl Creek — 34.49°N, 89.00°WMancos Shale — 36.35°N, 109.82°WMancos Shale — 36.14°N, 109.82°WMancos Shale — 36.16°N, 109.84°WMancos Shale — 36.18°N, 109.88°WMancos Shale — 35.96°N, 110.89°WMancos Shale — 35.73°N, 110.82°WLadd — 33.70°N, 117.60°WLadd — 33.75°N, 117.64°WSevern — 38.80°N, 77.00°WSevern — 38.89°N, 76.85°WSevern — 38.92°N, 76.85°WCorsicana Marl — 33.53°N, 94.51°WCorsicana Marl — 30.37°N, 97.46°WCorsicana Marl — 29.83°N, 97.84°WCorsicana Marl — 29.63°N, 98.54°WCorsicana Marl — 29.37°N, 98.78°WCorsicana Marl — 31.30°N, 96.90°WCorsicana Marl — 29.57°N, 97.96°WDrug — 29.95°N, 70.12°EWoodbine — 32.73°N, 97.22°WWoodbine — 32.77°N, 97.01°WWoodbine — 32.86°N, 97.06°WWoodbine — 33.73°N, 96.77°WWoodbine — 33.66°N, 96.45°WWoodbine — 33.87°N, 95.57°WMoodys Branch — 32.01°N, 92.00°WMoodys Branch — 32.33°N, 90.15°WMoodys Branch — 31.86°N, 88.70°WChiwapa — 34.63°N, 88.85°WChiwapa — 34.60°N, 88.95°WChiwapa — 34.46°N, 88.90°WRipley — 34.25°N, 90.00°WRipley — 32.05°N, 86.78°WRipley — 35.32°N, 88.42°WRipley — 35.29°N, 88.60°WRipley — 34.45°N, 89.01°WBlack Creek — 35.77°N, 78.64°WBlack Creek — 34.67°N, 78.24°WBlack Creek — 35.23°N, 77.79°WBlack Creek — 35.46°N, 77.68°WBlack Creek — 35.67°N, 77.47°WChulec — 6.57°S, 78.73°WChulec — 7.16°S, 78.51°WChulec — 6.77°S, 78.62°WKemp Clay — 30.23°N, 97.52°WTropic Shale — 37.07°N, 111.62°WTropic Shale — 37.21°N, 111.17°WAnacacho Limestone — 29.35°N, 99.14°WAnacacho Limestone — 29.44°N, 98.86°WAnacacho Limestone — 29.19°N, 100.30°WMount Laurel Sand — 39.55°N, 75.65°WRomiron — 5.48°S, 78.52°WPawkowki — 49.01°N, 111.08°WPawkowki — 49.10°N, 112.14°WPawkowki — 49.11°N, 111.04°WWapiabi — 52.92°N, 115.23°WWapiabi — 53.00°N, 115.00°WWapiabi — 52.61°N, 116.34°W

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The named rock units Poromyidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 70 further formations hold fewer occurrences each and are not listed. 63 occurrences have no formation on record, which is common for older literature.

Poromyidae and its relatives

Late Cretaceous

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

Found in the same rock

2,079 taxa

The Paleobiology Database records 350 sites for Poromyidae, 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

96 references

Each of the 405 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. 84 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 content1

Picture of Poromyidae

Credit
nobody named on the record
Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record

No 3D scan of Poromyidae 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 itPoromyoidea through timeFormations of the Late CretaceousThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Dall 1886