Calliostoma gemmulatum

Calliostoma gemmulatum, common name the western gem top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.

Calliostoma gemmulatum

G.W. Tryon · 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
gem top shellPBDB
Sits inside
CalliostomaPBDB
Diet
carnivorePBDB, for Calliostoma
Life habit
epifaunalPBDB, for Calliostoma
Motility
actively mobilePBDB, for Calliostoma
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 3.4 million years on record.

The record covers at least 3.6 Mya to 129 ka. No occurrence read is dated outside 5.333 Mya to 11.7 ka.

Miocene — about 0 of 32 occurrencesPliocene — about 8 of 32 occurrencesPliocenePleistocene — about 24 of 32 occurrencesPleistoceneHolocene — about 0 of 32 occurrences5.4–5.3 Mya — about 0.2 occurrences5.3–5.1 Mya — about 0.4 occurrences5.1–4.9 Mya — about 0.4 occurrences4.9–4.7 Mya — about 0.4 occurrences4.7–4.5 Mya — about 0.4 occurrences4.5–4.3 Mya — about 0.4 occurrences4.3–4.1 Mya — about 0.4 occurrences4.1–3.9 Mya — about 0.4 occurrences3.9–3.7 Mya — about 0.4 occurrences3.7–3.5 Mya — about 0.6 occurrences3.5–3.3 Mya — about 0.8 occurrences3.3–3.1 Mya — about 0.8 occurrences3.1–2.9 Mya — about 0.8 occurrences2.9–2.7 Mya — about 0.8 occurrences2.7–2.5 Mya — about 0.8 occurrences2.5–2.3 Mya — about 1 occurrence2.3–2.1 Mya — about 1 occurrence2.1–1.9 Mya — about 1 occurrence1.9–1.8 Mya — about 0.9 occurrences1.8–1.6 Mya — about 0.2 occurrences1.6–1.4 Mya — about 0.2 occurrences1.4–1.2 Mya — about 0.2 occurrences1.2–972 ka Mya — about 0.2 occurrences972 ka–778 ka Mya — about 0.2 occurrences778 ka–583 ka Mya — about 0.7 occurrences583 ka–389 ka Mya — about 0.7 occurrences389 ka–194 ka Mya — about 0.7 occurrences194 ka–0 Mya — about 16 occurrences3.6 Mya129 ka5.8 Mya0 Mya

32 occurrences of Calliostoma gemmulatum 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

32 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

7 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°WPalos Verdes Sand — 33.66°N, 117.94°WTowsley — 34.36°N, 118.51°WCareaga Sandstone — 34.88°N, 120.51°WFernando — 34.05°N, 118.25°WFernando — 34.05°N, 118.26°WSanta Barbara — 34.40°N, 119.69°WPico — 34.36°N, 118.56°WPico — 34.33°N, 118.72°WPalos Verdes — 33.63°N, 117.90°W

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The named rock units Calliostoma gemmulatum has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 occurrences have no formation on record, which is common for older literature.

Calliostoma gemmulatum and its relatives

Pleistocene

Where Calliostoma gemmulatum and its relatives were recorded in the Pleistocene.

Found in the same rock

1,027 taxa

The Paleobiology Database records 32 sites for Calliostoma gemmulatum, 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

18 references

Each of the 32 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. 6 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 Calliostoma gemmulatum

Credit
G.W. Tryon
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Calliostoma gemmulatum 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 itCalliostoma through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Carpenter 1864