Placuna

Placuna

Johnnyflex · CC BY-SA 3.0 · via Wikidata/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
PlacunidaePBDB
Diet
suspension feederPBDB, for Placunidae
Life habit
epifaunalPBDB, for Placunidae
Motility
stationary, attachedPBDB, for Placunidae
Vision
blindPBDB, for Bivalvia
Environment
marinePBDB, for Pectinida

Time the record covers

At least 15 million years on record.

The record covers at least 15.98 Mya to 11.7 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 41 occurrencesMiocene — about 10 of 41 occurrencesMiocenePliocene — about 25 of 41 occurrencesPliocenePleistocene — about 5 of 41 occurrencesPleistocene24–23 Mya — about 0.1 occurrences23–22 Mya — about 0.2 occurrences22–21 Mya — about 0.2 occurrences21–20 Mya — about 0.2 occurrences20–20 Mya — about 0.4 occurrences20–19 Mya — about 0.4 occurrences19–18 Mya — about 0.4 occurrences18–17 Mya — about 0.4 occurrences17–16 Mya — about 0.4 occurrences16–16 Mya — about 0.4 occurrences16–15 Mya — about 0.4 occurrences15–14 Mya — about 0.4 occurrences14–13 Mya — about 0.1 occurrences12–11 Mya — about 0.6 occurrences11–10 Mya — about 0.7 occurrences10–9.4 Mya — about 0.7 occurrences9.4–8.6 Mya — about 0.7 occurrences8.6–7.8 Mya — about 0.7 occurrences7.8–7.1 Mya — about 0.7 occurrences7.1–6.3 Mya — about 0.7 occurrences6.3–5.5 Mya — about 0.7 occurrences5.5–4.7 Mya — about 6 occurrences4.7–3.9 Mya — about 7 occurrences3.9–3.1 Mya — about 7 occurrences3.1–2.4 Mya — about 6 occurrences2.4–1.6 Mya — about 1 occurrence1.6–785 ka Mya — about 1 occurrence785 ka–0 Mya — about 3 occurrences15.98 Mya11.7 ka23.5 Mya0 Mya

41 occurrences of Placuna on record, most of them in the Pliocene. 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

41 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

9 formations

Togopi — 5.50°N, 117.00°ETartaro — 15.15°N, 121.01°ETartaro — 14.95°N, 121.05°EJaffna Limestone — 8.26°N, 79.84°EMarada — 29.23°N, 19.20°ECilanang — 6.73°S, 108.67°EUpper Kalibeng — 7.49°S, 110.00°ELower Gelingseh — 1.50°N, 116.50°EQuilon Limestone — 8.87°N, 76.59°EChasra — 23.09°N, 69.05°E

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The named rock units Placuna has been recovered from, largest first. Drawn where the rock is now, not where it formed. 27 occurrences have no formation on record, which is common for older literature.

Placuna and its relatives

Pliocene

Where Placuna and its relatives were recorded in the Pliocene.

Found in the same rock

393 taxa

The Paleobiology Database records 8 sites for Placuna, 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

17 references

Each of the 41 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. 5 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 Placuna

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

No 3D scan of Placuna 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itPlacunidae through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Lightfoot 1786