Leukoma staminea

Leukoma staminea, commonly known as the Pacific littleneck clam, the littleneck clam, the rock cockle, the hardshell clam, the Tomales Bay cockle, the rock clam or the ribbed carpet shell, is a species of bivalve mollusc in the family Veneridae. This species of mollusc was exploited by early humans in North America; for example, the Chumash peoples of Central California harvested these clams in Morro Bay approximately 1,000 years ago, and the distinctive shells form middens near their settlements.

Leukoma staminea

Unknown author Unknown author · 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
Also called
common littleneckPBDB
Sits inside
LeukomaPBDB
Diet
suspension feederPBDB, for Leukoma
Life habit
infaunalPBDB, for Leukoma
Motility
facultatively mobilePBDB, for Leukoma
Vision
blindPBDB, for Bivalvia

Time the record covers

At least 15 million years on record.

The record covers at least 15.98 Mya to 129 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 109 occurrencesMiocene — about 6 of 109 occurrencesMiocenePliocene — about 15 of 109 occurrencesPliocenePleistocene — about 88 of 109 occurrencesPleistocene24–23 Mya — about 0.0 occurrences23–22 Mya — about 0.1 occurrences22–21 Mya — about 0.1 occurrences21–20 Mya — about 0.1 occurrences20–20 Mya — about 0.1 occurrences20–19 Mya — about 0.1 occurrences19–18 Mya — about 0.1 occurrences18–17 Mya — about 0.1 occurrences17–16 Mya — about 0.1 occurrences16–16 Mya — about 0.1 occurrences16–15 Mya — about 0.1 occurrences15–14 Mya — about 0.1 occurrences14–13 Mya — about 0.1 occurrences13–13 Mya — about 0.1 occurrences13–12 Mya — about 0.1 occurrences12–11 Mya — about 0.4 occurrences11–10 Mya — about 0.5 occurrences10–9.4 Mya — about 0.5 occurrences9.4–8.6 Mya — about 0.5 occurrences8.6–7.8 Mya — about 0.5 occurrences7.8–7.1 Mya — about 0.6 occurrences7.1–6.3 Mya — about 0.7 occurrences6.3–5.5 Mya — about 0.7 occurrences5.5–4.7 Mya — about 3 occurrences4.7–3.9 Mya — about 3 occurrences3.9–3.1 Mya — about 5 occurrences3.1–2.4 Mya — about 6 occurrences2.4–1.6 Mya — about 6 occurrences1.6–785 ka Mya — about 6 occurrences785 ka–0 Mya — about 73 occurrences15.98 Mya129 ka23.5 Mya0 Mya

109 occurrences of Leukoma staminea 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

109 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

24 formations

Palos Verdes Sand — 33.80°N, 118.16°WPalos Verdes Sand — 33.99°N, 118.45°WPalos Verdes Sand — 33.74°N, 118.28°WPalos Verdes Sand — 33.64°N, 117.89°WPalos Verdes Sand — 33.66°N, 117.94°WUnnamed — 33.24°N, 119.51°WSan Pedro Sand — 33.74°N, 118.28°WJacalitos — 36.07°N, 120.44°WJacalitos — 36.06°N, 120.45°WJacalitos — 36.03°N, 120.39°WJacalitos — 35.95°N, 120.17°WPico — 34.42°N, 118.70°WPico — 34.36°N, 118.56°WErmanovskaya — 58.50°N, 159.17°EBattery — 41.76°N, 124.20°WHookton — 40.98°N, 124.11°WEtchegoin — 36.95°N, 120.16°WEtchegoin — 36.00°N, 120.27°WLate Pleistocene terrace — 46.37°N, 123.96°WEnemtenskaya — 58.00°N, 158.00°EEtolonskaya — 58.42°N, 159.00°EMysa Ploskogo — 58.75°N, 163.75°ESaanich — 47.58°N, 122.42°WElk River — 42.74°N, 124.49°WWildcat — 40.64°N, 124.31°WMerced — 38.37°N, 122.92°WPancho Rico — 35.89°N, 121.05°WFernando — 34.05°N, 118.25°WBay Point — 32.78°N, 117.24°WPalos Verdes — 33.63°N, 117.90°WAnchor — 34.04°N, 118.40°WTowsley — 34.34°N, 118.54°WSan Diego — 32.54°N, 117.11°W

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The named rock units Leukoma staminea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 54 occurrences have no formation on record, which is common for older literature.

Leukoma staminea and its relatives

Pleistocene

Where Leukoma staminea and its relatives were recorded in the Pleistocene.

Found in the same rock

1,317 taxa

The Paleobiology Database records 92 sites for Leukoma staminea, 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

44 references

Each of the 109 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. 32 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 Leukoma staminea

Credit
Unknown author Unknown author
Licence
Public Domain
Commercial use
the licence allows it

3D model

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

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

Everything alive alongside itLeukoma through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Conrad 1837)