Acmaea

Acmaea is a genus of sea snails, specifically true limpets, marine gastropod mollusks in the family Acmaeidae, one of the families of true limpets.

Acmaea

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
limpetPBDB
Sits inside
AcmaeinaePBDB
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 201 million years on record.

The record covers at least 201.4 Mya to 129 ka. No occurrence read is dated outside 205.7 Mya to 0 Mya.

Late Triassic — about 1 of 195 occurrencesEarly Jurassic — about 0 of 195 occurrencesMiddle Jurassic — about 1 of 195 occurrencesLate Jurassic — about 0 of 195 occurrencesEarly Cretaceous — about 8 of 195 occurrencesEarly CretaceousLate Cretaceous — about 28 of 195 occurrencesLate CretaceousPaleocene — about 11 of 195 occurrencesEocene — about 19 of 195 occurrencesEoceneOligocene — about 13 of 195 occurrencesMiocene — about 12 of 195 occurrencesMiocenePliocene — about 23 of 195 occurrencesPleistocene — about 79 of 195 occurrences210–203 Mya — about 0.7 occurrences203–196 Mya — about 0.3 occurrences175–168 Mya — about 0.5 occurrences168–161 Mya — about 0.5 occurrences126–119 Mya — about 1 occurrence119–112 Mya — about 7 occurrences105–98 Mya — about 2 occurrences98–91 Mya — about 4 occurrences91–84 Mya — about 1 occurrence84–77 Mya — about 2 occurrences77–70 Mya — about 7 occurrences70–63 Mya — about 15 occurrences63–56 Mya — about 6 occurrences56–49 Mya — about 2 occurrences49–42 Mya — about 0.8 occurrences42–35 Mya — about 14 occurrences35–28 Mya — about 10 occurrences28–21 Mya — about 5 occurrences21–14 Mya — about 3 occurrences14–7.0 Mya — about 7 occurrences7.0–0 Mya — about 103 occurrences201.4 Mya129 ka210 Mya0 Mya

195 occurrences of Acmaea 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

195 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

64 formations

Unnamed — 33.24°N, 119.51°WUnnamed — 33.24°N, 119.55°WCorsicana Marl — 31.82°N, 96.54°WCorsicana Marl — 31.12°N, 96.82°WCorsicana Marl — 30.26°N, 97.54°WCorsicana Marl — 29.60°N, 98.03°WCorsicana Marl — 29.49°N, 98.19°WCorsicana Marl — 31.30°N, 96.90°WWoodbine — 32.86°N, 97.06°WWoodbine — 33.66°N, 96.45°WWoodbine — 32.74°N, 97.11°WWoodbine — 33.73°N, 96.77°WWoodbine — 33.73°N, 96.59°WBowden — 17.88°N, 76.28°WCook Mountain — 31.09°N, 95.95°WCook Mountain — 31.20°N, 95.73°WCook Mountain — 31.25°N, 95.72°WCook Mountain — 30.62°N, 96.56°WTanohata — 39.84°N, 141.98°ESandgate — 51.00°N, 0.85°WSandgate — 51.35°N, 2.08°WSooke — 48.57°N, 124.60°WSooke — 48.38°N, 123.87°WTimms Point Silt — 33.73°N, 118.28°WQuimper — 48.00°N, 122.83°WNiguel — 33.64°N, 117.89°WLopez de Bertodano — 64.25°S, 56.75°WAgatdal — 70.58°N, 53.10°WCzarnorzeki Beds — 49.77°N, 21.97°ECzarnorzeki Beds — 49.77°N, 21.93°ETalparo — 10.67°N, 61.07°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°WLomita Marl — 33.75°N, 118.30°WLomita Marl — 33.74°N, 118.29°WPalos Verdes Sand — 33.72°N, 118.28°WLincoln Creek — 47.66°N, 122.96°WPrairie Bluff — 32.14°N, 87.42°WProvidence — 31.89°N, 85.70°WCoffee Sand — 34.26°N, 88.70°WKemp Clay — 29.42°N, 98.49°W

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The named rock units Acmaea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 40 further formations hold fewer occurrences each and are not listed. 72 occurrences have no formation on record, which is common for older literature.

Acmaea and its relatives

Pleistocene

Where Acmaea and its relatives were recorded in the Pleistocene.

Found in the same rock

2,912 taxa

The Paleobiology Database records 144 sites for Acmaea, and this reads all of them. Of that, one read hit the database's own return limit, so every count below is a floor rather than a total. 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

94 references

Each of the 195 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. 82 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

Credit
Jerry Kirkhart
Licence
CC BY 2.0
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 itAcmaeinae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Eschscholtz 1830)