Bolma

Bolma is a genus of medium to large sea snails with a calcareous operculum, marine gastropod molluscs in the family Turbinidae, the turban snails.

Bolma

Hectonichus · CC BY-SA 3.0 · 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
Sits inside
TurbininaePBDB
Diet
grazerPBDB, for Turbinidae
Life habit
epifaunalPBDB, for Turbinidae
Motility
actively mobilePBDB, for Turbinidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 33 million years on record.

The record covers at least 33.9 Mya to 11.7 ka. No occurrence read is dated outside 37.71 Mya to 0 Mya.

Eocene — about 2 of 86 occurrencesEoceneOligocene — about 3 of 86 occurrencesOligoceneMiocene — about 33 of 86 occurrencesMiocenePliocene — about 24 of 86 occurrencesPleistocene — about 22 of 86 occurrences38–37 Mya — about 0.3 occurrences37–36 Mya — about 0.7 occurrences36–35 Mya — about 0.7 occurrences35–33 Mya — about 0.6 occurrences33–32 Mya — about 0.5 occurrences32–31 Mya — about 0.5 occurrences31–29 Mya — about 0.5 occurrences29–28 Mya — about 0.5 occurrences28–27 Mya — about 0.4 occurrences27–26 Mya — about 0.1 occurrences26–24 Mya — about 0.1 occurrences24–23 Mya — about 0.1 occurrences23–22 Mya — about 0.2 occurrences22–21 Mya — about 0.2 occurrences21–19 Mya — about 1.0 occurrences19–18 Mya — about 1 occurrence18–17 Mya — about 1 occurrence17–15 Mya — about 0.6 occurrences14–13 Mya — about 16 occurrences13–12 Mya — about 4 occurrences12–10 Mya — about 2 occurrences10–9.0 Mya — about 2 occurrences9.0–7.7 Mya — about 2 occurrences7.7–6.4 Mya — about 1 occurrence6.4–5.1 Mya — about 2 occurrences5.1–3.8 Mya — about 6 occurrences3.8–2.6 Mya — about 17 occurrences2.6–1.3 Mya — about 6 occurrences1.3–0 Mya — about 18 occurrences33.9 Mya11.7 ka38.5 Mya0 Mya

86 occurrences of Bolma on record, most of them in the Miocene. 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

86 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

19 formations

Korytnica Clays — 50.67°N, 20.52°ETermofourà — 45.05°N, 7.80°EShimajiri — 26.13°N, 127.78°EShimajiri — 26.13°N, 127.72°ENaha — 26.34°N, 127.83°ENaha — 26.16°N, 127.79°EDeborah Volcanic — 45.18°S, 170.91°EGavdos — 34.83°N, 24.08°EApostoli — 35.25°N, 24.58°EKourtes — 35.20°N, 25.10°ELindos Acropolis — 35.92°N, 27.83°ENicosia — 35.10°N, 33.15°EShinzato — 26.37°N, 127.97°EWaihao Greensand — 44.78°S, 171.17°EMariana Limestone — 13.45°N, 144.78°ESenhata — 35.16°N, 139.86°EPanchina — 43.57°N, 10.35°EMonte Giogo — 44.85°N, 9.86°EAksucay — 37.27°N, 30.78°EStudienka — 48.44°N, 17.16°ERhodes — 36.42°N, 28.20°E

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The named rock units Bolma 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.

Bolma and its relatives

Miocene

Where Bolma and its relatives were recorded in the Miocene.

Found in the same rock

1,498 taxa

The Paleobiology Database records 31 sites for Bolma, 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

36 references

Each of the 86 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. 24 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 Bolma

Credit
Hectonichus
Licence
CC BY-SA 3.0
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 and MorphoSource were 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 itTurbininae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Risso 1826)