Circomphalus

Circomphalus is a genus of saltwater clams, marine bivalve molluscs in the family Veneridae, the venus clams.

Circomphalus

Hectonichus · 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
VenerinaePBDB
Diet
suspension feederPBDB
Life habit
infaunalPBDB
Motility
facultatively mobilePBDB
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 15 million years on record.

The record covers at least 15.98 Mya to 774 ka. No occurrence read is dated outside 23.04 Mya to 129 ka.

Oligocene — about 0 of 27 occurrencesMiocene — about 19 of 27 occurrencesMiocenePliocene — about 6 of 27 occurrencesPliocenePleistocene — about 2 of 27 occurrencesPleistocene24–23 Mya — about 0.0 occurrences23–22 Mya — about 0.1 occurrences22–21 Mya — about 0.1 occurrences21–20 Mya — about 0.1 occurrences20–20 Mya — about 0.3 occurrences20–19 Mya — about 0.3 occurrences19–18 Mya — about 0.3 occurrences18–17 Mya — about 0.3 occurrences17–16 Mya — about 0.3 occurrences16–16 Mya — about 0.6 occurrences16–15 Mya — about 1 occurrence15–14 Mya — about 1 occurrence14–13 Mya — about 5 occurrences13–13 Mya — about 5 occurrences13–12 Mya — about 2 occurrences12–11 Mya — about 0.5 occurrences11–10 Mya — about 0.2 occurrences10–9.4 Mya — about 0.2 occurrences9.4–8.6 Mya — about 0.2 occurrences8.6–7.8 Mya — about 0.2 occurrences7.8–7.1 Mya — about 0.2 occurrences7.1–6.3 Mya — about 0.4 occurrences6.3–5.5 Mya — about 0.4 occurrences5.5–4.7 Mya — about 1 occurrence4.7–3.9 Mya — about 1 occurrence3.9–3.1 Mya — about 2 occurrences3.1–2.4 Mya — about 2 occurrences2.4–1.6 Mya — about 0.4 occurrences1.6–785 ka Mya — about 0.4 occurrences785 ka–0 Mya — about 1 occurrence15.98 Mya774 ka23.5 Mya0 Mya

27 occurrences of Circomphalus on record, most of them in the Miocene. 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

27 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

5 formations

Torrente Meduna Siltstone — 46.22°N, 12.80°EWeglinek — 50.72°N, 21.95°EPinczow — 50.53°N, 20.53°ECarnide Sandston — 39.92°N, 8.72°WVienna Basin — 47.95°N, 16.20°E

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The named rock units Circomphalus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 22 occurrences have no formation on record, which is common for older literature.

Circomphalus and its relatives

Miocene

Where Circomphalus and its relatives were recorded in the Miocene.

Found in the same rock

434 taxa

The Paleobiology Database records 12 sites for Circomphalus, 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

15 references

Each of the 27 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. 3 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 Circomphalus

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

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Circomphalus foliaceo-lamellosa · fmnh:invertebrate zoology:296350

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 itVenerinae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Mörch 1853)