Acmaea mitra

Acmaea mitra, common name the whitecap limpet, is a species of sea snail or true limpet, a marine gastropod mollusc in the family Acmaeidae, one of the families of true limpets.

Acmaea mitra

Jerry Kirkhart · CC BY 2.0 · 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
Also called
white-cap limpetPBDB
Sits inside
AcmaeaPBDB
Diet
grazerPBDB, for Acmaeidae
Life habit
epifaunalPBDB, for Acmaeidae
Motility
facultatively mobile, attachedPBDB, for Acmaeidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 33 million years on record.

The record covers at least 33.9 Mya to 129 ka. No occurrence read is dated outside 37.71 Mya to 0 Mya.

Eocene — about 1 of 60 occurrencesEoceneOligocene — about 1 of 60 occurrencesOligoceneMiocene — about 3 of 60 occurrencesMiocenePliocene — about 4 of 60 occurrencesPleistocene — about 51 of 60 occurrences38–37 Mya — about 0.1 occurrences37–36 Mya — about 0.3 occurrences36–35 Mya — about 0.3 occurrences35–33 Mya — about 0.2 occurrences28–27 Mya — about 0.1 occurrences27–26 Mya — about 0.3 occurrences26–24 Mya — about 0.3 occurrences24–23 Mya — about 0.3 occurrences23–22 Mya — about 0.0 occurrences13–12 Mya — about 0.0 occurrences12–10 Mya — about 0.5 occurrences10–9.0 Mya — about 0.5 occurrences9.0–7.7 Mya — about 0.5 occurrences7.7–6.4 Mya — about 0.5 occurrences6.4–5.1 Mya — about 0.5 occurrences5.1–3.8 Mya — about 0.1 occurrences3.8–2.6 Mya — about 4 occurrences2.6–1.3 Mya — about 11 occurrences1.3–0 Mya — about 41 occurrences33.9 Mya129 ka38.5 Mya0 Mya

60 occurrences of Acmaea mitra 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

60 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

12 formations

Unnamed — 33.24°N, 119.51°WUnnamed — 33.24°N, 119.55°WTowsley — 34.47°N, 119.02°WTowsley — 34.41°N, 118.48°WQuaternary terrace — 33.75°N, 118.33°WQuaternary terrace — 33.76°N, 118.35°WPalos Verdes Sand — 33.72°N, 118.28°WItahana — 36.32°N, 138.89°EFernando — 34.05°N, 118.25°WSooke — 48.38°N, 123.87°WQuimper — 48.00°N, 122.83°WTimms Point Silt — 33.73°N, 118.28°WPico — 34.36°N, 118.56°WNiguel — 33.64°N, 117.89°WSanta Barbara — 34.40°N, 119.69°W

Loading coastlines…

The named rock units Acmaea mitra has been recovered from, largest first. Drawn where the rock is now, not where it formed. 33 occurrences have no formation on record, which is common for older literature.

Acmaea mitra and its relatives

Pleistocene

Where Acmaea mitra and its relatives were recorded in the Pleistocene.

Found in the same rock

707 taxa

The Paleobiology Database records 51 sites for Acmaea mitra, 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

24 references

Each of the 60 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. 12 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 Acmaea mitra

Credit
Jerry Kirkhart
Licence
CC BY 2.0
Commercial use
the licence allows it

No 3D scan of Acmaea mitra 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.

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 itAcmaea through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Eschscholtz 1833)