Arca

Arca is a genus of edible saltwater clams in the family Arcidae, the Ark Clams.

Arca

Uncredited · CC BY 2.5 · 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
Also called
arkPBDB
Sits inside
ArcinaePBDB
Diet
suspension feederPBDB
Life habit
epifaunalPBDB
Motility
stationary, attachedPBDB
Vision
limitedPBDB, for Arcidae
Environment
lagoonal,coastal,inner shelf,outer shelf,oceanic,brackish,freshwaterPBDB, for Arcidae

Time the record covers

At least 264 million years on record.

The record covers at least 264.28 Mya to 11.7 ka. No occurrence read is dated outside 266.9 Mya to 0 Mya.

Permian — about 4 of 805 occurrencesEarly Triassic — about 0 of 805 occurrencesMiddle Triassic — about 10 of 805 occurrencesLate Triassic — about 14 of 805 occurrencesLate TriassicEarly Jurassic — about 6 of 805 occurrencesEarly JurassicMiddle Jurassic — about 2 of 805 occurrencesLate Jurassic — about 21 of 805 occurrencesEarly Cretaceous — about 106 of 805 occurrencesEarly CretaceousLate Cretaceous — about 136 of 805 occurrencesLate CretaceousPaleocene — about 27 of 805 occurrencesEocene — about 82 of 805 occurrencesOligocene — about 28 of 805 occurrencesMiocene — about 163 of 805 occurrencesPliocene — about 90 of 805 occurrencesPleistocene — about 112 of 805 occurrences272–263 Mya — about 3 occurrences263–254 Mya — about 1 occurrence254–245 Mya — about 0.8 occurrences245–236 Mya — about 10 occurrences236–227 Mya — about 3 occurrences227–218 Mya — about 0.4 occurrences218–209 Mya — about 0.4 occurrences209–200 Mya — about 11 occurrences200–191 Mya — about 1 occurrence191–181 Mya — about 2 occurrences181–172 Mya — about 0.4 occurrences172–163 Mya — about 2 occurrences163–154 Mya — about 6 occurrences154–145 Mya — about 15 occurrences145–136 Mya — about 4 occurrences136–127 Mya — about 35 occurrences127–118 Mya — about 22 occurrences118–109 Mya — about 22 occurrences109–100 Mya — about 24 occurrences100–91 Mya — about 8 occurrences91–82 Mya — about 10 occurrences82–73 Mya — about 31 occurrences73–64 Mya — about 97 occurrences64–54 Mya — about 20 occurrences54–45 Mya — about 19 occurrences45–36 Mya — about 48 occurrences36–27 Mya — about 28 occurrences27–18 Mya — about 46 occurrences18–9.1 Mya — about 82 occurrences9.1–0 Mya — about 251 occurrences264.28 Mya11.7 ka272 Mya0 Mya

805 occurrences of Arca 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

805 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

237 formations

Prairie Bluff — 33.89°N, 88.96°WPrairie Bluff — 33.79°N, 88.97°WPrairie Bluff — 33.79°N, 88.91°WPrairie Bluff — 33.46°N, 88.79°WPrairie Bluff — 33.03°N, 88.56°WPrairie Bluff — 32.67°N, 88.29°WPrairie Bluff — 32.74°N, 88.36°WPrairie Bluff — 32.70°N, 88.17°WPrairie Bluff — 32.61°N, 88.18°WPrairie Bluff — 32.43°N, 88.04°WPrairie Bluff — 32.39°N, 87.92°WPrairie Bluff — 32.23°N, 87.50°WPrairie Bluff — 32.13°N, 87.40°WPrairie Bluff — 32.07°N, 87.33°WPrairie Bluff — 32.05°N, 86.99°WPrairie Bluff — 31.97°N, 86.72°WPrairie Bluff — 32.00°N, 86.48°WPrairie Bluff — 31.98°N, 86.00°WPrairie Bluff — 32.05°N, 86.78°WBlack Creek — 35.77°N, 78.64°WBlack Creek — 34.68°N, 78.23°WBlack Creek — 34.58°N, 78.27°WBlack Creek — 35.23°N, 77.79°WBlack Creek — 35.22°N, 77.68°WCaloosahatchee — 25.75°N, 81.94°WCaloosahatchee — 26.89°N, 82.01°WCaloosahatchee — 27.77°N, 82.68°WCaloosahatchee — 26.80°N, 81.37°WCaloosahatchee — 26.75°N, 81.51°WEscondido — 29.59°N, 98.07°WEscondido — 29.25°N, 99.24°WEscondido — 29.05°N, 100.11°WEscondido — 28.96°N, 100.22°WEscondido — 28.87°N, 100.27°WEscondido — 28.71°N, 100.50°WEscondido — 28.66°N, 100.44°WCastle Hayne — 34.44°N, 77.89°WCastle Hayne — 34.23°N, 77.94°WCastle Hayne — 34.66°N, 77.70°WCastle Hayne — 35.01°N, 77.57°WCastle Hayne — 34.36°N, 77.82°WCassian — 46.55°N, 11.93°ECassian — 46.54°N, 11.62°ECassian — 46.57°N, 11.94°ECassian — 46.51°N, 11.76°ECook Mountain — 31.09°N, 95.95°WCook Mountain — 31.20°N, 95.73°WCook Mountain — 30.63°N, 96.55°WCook Mountain — 30.64°N, 96.52°WCook Mountain — 30.07°N, 97.08°WCook Mountain — 29.99°N, 97.09°WCorsicana Marl — 31.74°N, 96.61°WCorsicana Marl — 29.83°N, 97.84°WCorsicana Marl — 29.60°N, 98.03°WCorsicana Marl — 29.63°N, 98.54°WCorsicana Marl — 29.59°N, 98.08°WCorsicana Marl — 31.30°N, 96.90°WProvidence — 31.87°N, 86.08°WProvidence — 31.92°N, 85.35°WProvidence — 31.84°N, 85.22°WProvidence — 31.95°N, 85.68°WProvidence — 31.76°N, 85.13°WProvidence — 31.73°N, 85.11°WProvidence — 31.89°N, 85.21°WUpper Bhuban — 23.72°N, 92.72°EUpper Bhuban — 22.88°N, 92.73°EUpper Bhuban — 23.00°N, 93.00°EImperial — 33.41°N, 116.06°WChipola — 30.44°N, 85.19°WChipola — 30.57°N, 85.84°WChipola — 30.43°N, 84.98°WTamiami — 26.72°N, 81.61°WTamiami — 25.67°N, 80.31°WTamiami — 26.01°N, 81.13°WTamiami — 26.73°N, 81.52°WPeedee — 33.89°N, 79.41°WPeedee — 35.77°N, 78.64°WPeedee — 34.48°N, 78.41°WAguja — 29.83°N, 103.25°WCercado — 19.47°N, 71.08°WCercado — 19.57°N, 71.25°WCercado — 19.53°N, 71.27°WGurabo — 19.53°N, 71.20°WGurabo — 18.73°N, 71.00°WGurabo — 19.30°N, 70.50°WGurabo — 19.53°N, 71.33°WGurabo — 19.30°N, 71.67°WVuache — 46.83°N, 6.52°EVincentown — 39.97°N, 74.68°WVincentown — 39.76°N, 75.11°WVincentown — 40.07°N, 74.53°WVincentown — 39.94°N, 74.75°WMount Laurel Sand — 39.55°N, 75.65°WGrès verts helvétiques — 46.09°N, 6.76°EGrès verts helvétiques — 46.04°N, 6.62°EGrès verts helvétiques — 45.98°N, 6.78°EBowden — 17.88°N, 76.28°WZorritos — 3.67°S, 80.65°WZorritos — 3.80°S, 80.50°WLas Cahobas — 18.53°N, 72.54°WLas Cahobas — 18.51°N, 72.27°W

Loading coastlines…

The named rock units Arca has been recovered from, largest first. Drawn where the rock is now, not where it formed. 213 further formations hold fewer occurrences each and are not listed. 274 occurrences have no formation on record, which is common for older literature.

Arca and its relatives

Miocene

Where Arca and its relatives were recorded in the Miocene.

Found in the same rock

3,585 taxa

The Paleobiology Database records 512 sites for Arca, 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

306 references

Each of the 805 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. 294 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 Arca

Credit
nobody named on the record
Licence
CC BY 2.5
Commercial use
the licence allows it

CT scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Coelophrys arca · sio:marine vertebrates:70-340

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 itArcinae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Linnaeus 1758