Fissurellidea bimaculata

Fissurellidea bimaculata

via iDigBio · CC0 · via iDigBio. 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
two-spotted keyhole limpetPBDB
Sits inside
FissurellideaPBDB
Diet
grazerPBDB, for Fissurellidae
Life habit
epifaunalPBDB, for Fissurellidae
Motility
facultatively mobilePBDB, for Fissurellidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 1.6 million years on record.

The record covers at least 1.8 Mya to 129 ka. No occurrence read is dated outside 5.333 Mya to 0 Mya.

Miocene — about 0 of 26 occurrencesPliocene — about 1 of 26 occurrencesPliocenePleistocene — about 25 of 26 occurrencesPleistoceneHolocene — about 0 of 26 occurrences5.4–5.3 Mya — about 0.0 occurrences5.3–5.1 Mya — about 0.1 occurrences5.1–4.9 Mya — about 0.1 occurrences4.9–4.7 Mya — about 0.1 occurrences4.7–4.5 Mya — about 0.1 occurrences4.5–4.3 Mya — about 0.1 occurrences4.3–4.1 Mya — about 0.1 occurrences4.1–3.9 Mya — about 0.1 occurrences3.9–3.7 Mya — about 0.1 occurrences3.7–3.5 Mya — about 0.1 occurrences3.5–3.3 Mya — about 0.1 occurrences3.3–3.1 Mya — about 0.1 occurrences3.1–2.9 Mya — about 0.1 occurrences2.9–2.7 Mya — about 0.1 occurrences2.7–2.5 Mya — about 0.2 occurrences2.5–2.3 Mya — about 0.5 occurrences2.3–2.1 Mya — about 0.5 occurrences2.1–1.9 Mya — about 0.5 occurrences1.9–1.8 Mya — about 0.5 occurrences1.8–1.6 Mya — about 0.5 occurrences1.6–1.4 Mya — about 0.5 occurrences1.4–1.2 Mya — about 0.5 occurrences1.2–972 ka Mya — about 0.5 occurrences972 ka–778 ka Mya — about 0.5 occurrences778 ka–583 ka Mya — about 2 occurrences583 ka–389 ka Mya — about 2 occurrences389 ka–194 ka Mya — about 2 occurrences194 ka–0 Mya — about 16 occurrences1.8 Mya129 ka5.8 Mya0 Mya

26 occurrences of Fissurellidea bimaculata on record, most of them in the Pleistocene. 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

26 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

6 formations

Palos Verdes Sand — 33.80°N, 118.16°WPalos Verdes Sand — 33.60°N, 117.88°WPalos Verdes Sand — 33.74°N, 118.28°WSan Pedro Sand — 33.74°N, 118.28°WUnnamed — 33.24°N, 119.51°WQuaternary terrace — 33.75°N, 118.33°WPico — 34.33°N, 118.72°WPalos Verdes — 33.63°N, 117.90°W

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The named rock units Fissurellidea bimaculata has been recovered from, largest first. Drawn where the rock is now, not where it formed. 14 occurrences have no formation on record, which is common for older literature.

Fissurellidea bimaculata and its relatives

Pleistocene

Where Fissurellidea bimaculata and its relatives were recorded in the Pleistocene.

Found in the same rock

935 taxa

The Paleobiology Database records 23 sites for Fissurellidea bimaculata, 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

19 references

Each of the 26 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. 7 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 Fissurellidea bimaculata

Source
iDigBio
Credit
via iDigBio
Licence
CC0
Commercial use
the licence allows it

No 3D scan of Fissurellidea bimaculata was found in Sketchfab.

Smithsonian Open Access and MorphoSource were 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 itFissurellidea through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Dall 1871)