Cyrena

Corbicula is a genus of freshwater and brackish water clams, aquatic bivalve mollusks in the family Cyrenidae, the basket clams. The genus name is the Neo-Latin diminutive of Latin corbis, a basket, referring to the shape and ribs of the shell.

Cyrena

Yaca2671 · CC BY-SA 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
CyrenidaePBDB
Diet
suspension feederPBDB, for Venerida
Life habit
infaunalPBDB, for Venerida
Motility
facultatively mobilePBDB, for Venerida
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 198 million years on record.

The record covers at least 201.4 Mya to 2.58 Mya. No occurrence read is dated outside 205.7 Mya to 11.7 ka.

Late Triassic — about 3 of 123 occurrencesEarly Jurassic — about 1 of 123 occurrencesEarly JurassicMiddle Jurassic — about 0 of 123 occurrencesLate Jurassic — about 2 of 123 occurrencesLate JurassicEarly Cretaceous — about 8 of 123 occurrencesEarly CretaceousLate Cretaceous — about 11 of 123 occurrencesLate CretaceousPaleocene — about 4 of 123 occurrencesEocene — about 60 of 123 occurrencesEoceneOligocene — about 24 of 123 occurrencesMiocene — about 7 of 123 occurrencesMiocenePliocene — about 0 of 123 occurrencesPleistocene — about 3 of 123 occurrences210–203 Mya — about 2 occurrences203–196 Mya — about 1.0 occurrences196–189 Mya — about 0.5 occurrences189–182 Mya — about 0.5 occurrences161–154 Mya — about 0.2 occurrences154–147 Mya — about 1 occurrence147–140 Mya — about 0.8 occurrences140–133 Mya — about 4 occurrences133–126 Mya — about 0.5 occurrences126–119 Mya — about 1 occurrence119–112 Mya — about 1 occurrence112–105 Mya — about 0.3 occurrences105–98 Mya — about 0.6 occurrences98–91 Mya — about 3 occurrences91–84 Mya — about 2 occurrences84–77 Mya — about 0.5 occurrences77–70 Mya — about 2 occurrences70–63 Mya — about 6 occurrences63–56 Mya — about 1 occurrence56–49 Mya — about 2 occurrences49–42 Mya — about 0.2 occurrences42–35 Mya — about 43 occurrences35–28 Mya — about 30 occurrences28–21 Mya — about 13 occurrences21–14 Mya — about 1 occurrence14–7.0 Mya — about 1 occurrence7.0–0 Mya — about 3 occurrences201.4 Mya2.58 Mya210 Mya0 Mya

123 occurrences of Cyrena on record, most of them in the Eocene. 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

123 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

33 formations

Headon Beds — 50.72°N, 1.59°WHeadon Beds — 50.67°N, 1.08°WHeadon Beds — 50.63°N, 1.55°WBembridge Marls — 50.67°N, 1.08°WBembridge Marls — 50.75°N, 1.33°WBembridge Marls — 50.71°N, 1.45°WArcadia — 27.89°N, 82.48°WArcadia — 27.93°N, 82.44°WArcadia — 27.96°N, 82.37°WArcadia — 28.15°N, 82.76°WArcadia — 30.48°N, 84.02°WArcadia — 30.20°N, 84.23°WArcadia — 30.62°N, 84.91°WArcadia — 30.69°N, 84.84°WArcadia — 30.77°N, 84.82°WMera — 46.82°N, 23.45°EMera — 47.40°N, 23.85°EMera — 46.87°N, 23.38°EMera — 47.30°N, 23.75°EMera — 47.33°N, 23.45°EMera — 47.03°N, 23.07°EOsborne Beds — 50.67°N, 1.57°WOsborne Beds — 50.71°N, 1.10°WOsborne Beds — 50.70°N, 1.51°WBarton Beds — 50.67°N, 1.57°WBarton Beds — 50.74°N, 1.69°WBembridge Limestone — 50.67°N, 1.08°WHeadon Hill — 50.67°N, 1.57°WBlackheath Beds — 51.43°N, 0.15°EMancos Shale — 35.73°N, 106.90°WLa Posa — 42.16°N, 0.96°ELa Posa — 42.15°N, 0.94°ESables a Nummulites variolarius — 49.25°N, 2.50°EMarnes de plage — 43.14°N, 0.95°EVectis — 50.62°N, 1.37°Wos — 50.70°N, 1.51°WBecton — 50.74°N, 1.69°WCarbonera — 6.80°N, 73.58°WSanta — 9.27°S, 77.68°WTzeliuching — 29.67°N, 104.80°EMarna di Possagno — 46.16°N, 13.37°EMount Hope — 9.27°N, 79.92°WMammaliferous Crag — 52.58°N, 1.38°WBruderndorf — 48.47°N, 16.30°EDunvegan — 55.13°N, 121.07°W

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The named rock units Cyrena has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 further formations hold fewer occurrences each and are not listed. 24 occurrences have no formation on record, which is common for older literature.

Cyrena and its relatives

Eocene

Where Cyrena and its relatives were recorded in the Eocene.

Found in the same rock

1,107 taxa

The Paleobiology Database records 99 sites for Cyrena, 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

42 references

Each of the 123 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. 30 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 Cyrena

Credit
Yaca2671
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itCyrenidae through timeFormations of the EoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lamarck