Lacuna

Lacuna is a genus of sea snails, marine gastropod mollusks in the family Littorinidae, the winkles or periwinkles.

Lacuna

George Brettingham Sowerby II · Public Domain · 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
LacuninaePBDB
Diet
grazerPBDB, for Littorinidae
Life habit
epifaunalPBDB, for Littorinidae
Motility
actively mobilePBDB, for Littorinidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 233 million years on record.

The record covers at least 233.6 Mya to 129 ka. No occurrence read is dated outside 237 Mya to 0 Mya.

Middle Triassic — about 0 of 130 occurrencesLate Triassic — about 3 of 130 occurrencesLate TriassicEarly Jurassic — about 0 of 130 occurrencesMiddle Jurassic — about 0 of 130 occurrencesLate Jurassic — about 0 of 130 occurrencesEarly Cretaceous — about 0 of 130 occurrencesLate Cretaceous — about 0 of 130 occurrencesPaleocene — about 6 of 130 occurrencesEocene — about 4 of 130 occurrencesEoceneOligocene — about 0 of 130 occurrencesMiocene — about 6 of 130 occurrencesPliocene — about 10 of 130 occurrencesPleistocene — about 101 of 130 occurrences242–234 Mya — about 3 occurrences234–226 Mya — about 0.1 occurrences73–64 Mya — about 1 occurrence64–56 Mya — about 5 occurrences48–40 Mya — about 2 occurrences40–32 Mya — about 2 occurrences24–16 Mya — about 0.4 occurrences16–8.1 Mya — about 5 occurrences8.1–0 Mya — about 112 occurrences233.6 Mya129 ka242 Mya0 Mya

130 occurrences of Lacuna 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

130 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

25 formations

Palos Verdes Sand — 33.80°N, 118.16°WPalos Verdes Sand — 33.99°N, 118.45°WPalos Verdes Sand — 33.60°N, 117.88°WPalos Verdes Sand — 33.74°N, 118.28°WUnnamed — 33.24°N, 119.51°WUnnamed — 33.24°N, 119.55°WSan Pedro Sand — 33.74°N, 118.28°WTowsley — 34.36°N, 118.51°WTowsley — 34.34°N, 118.54°WLomita Marl — 33.74°N, 118.29°WLomita Marl — 33.75°N, 118.30°WQuaternary terrace — 33.75°N, 118.33°WQuaternary terrace — 33.76°N, 118.35°WLellinge Greensand — 55.71°N, 12.60°ELellinge Greensand — 55.48°N, 10.47°ECassian — 46.68°N, 12.15°ECassian — 46.63°N, 12.21°EFernando — 34.05°N, 118.25°WKorytnica Clays — 50.67°N, 20.52°ECareaga Sandstone — 34.74°N, 120.41°WPalos Verdes — 33.63°N, 117.90°WOlcese — 35.45°N, 118.87°WOlcese — 35.45°N, 118.87°WPico — 34.42°N, 118.70°WSables a Nummulites variolarius — 49.25°N, 2.50°EAgatdal — 70.58°N, 53.10°WBarton Beds — 50.74°N, 1.69°WElk River — 42.74°N, 124.49°WBrightseat — 38.97°N, 76.85°WWexford Gravels — 52.43°N, 6.33°WFaluns de la Touraine — 47.40°N, 1.23°ESabbie di Asti — 44.90°N, 8.20°EKincaid — 31.29°N, 96.72°WSanta Barbara — 34.40°N, 119.69°W

Loading coastlines…

The named rock units Lacuna has been recovered from, largest first. Drawn where the rock is now, not where it formed. One further formation holds fewer occurrences and is not listed. 43 occurrences have no formation on record, which is common for older literature.

Lacuna and its relatives

Pleistocene

Where Lacuna and its relatives were recorded in the Pleistocene.

Found in the same rock

2,034 taxa

The Paleobiology Database records 85 sites for Lacuna, 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

49 references

Each of the 130 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. 37 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 Lacuna

Credit
George Brettingham Sowerby II
Licence
Public Domain
Commercial use
the licence allows it

3D model

Source
Sketchfab
Credit
muhecsad
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itLacuninae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Turton 1827