Umbonium

Umbonium, sometimes known as the "button top shells", is a genus of sea snails, marine gastropod molluscs in the family Trochidae, the top snails.

Umbonium

星組背番号10 · 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
UmboniiniPBDB
Diet
grazer, suspension feederPBDB
Life habit
epifaunalPBDB
Motility
actively mobilePBDB
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 234 million years on record.

The record covers at least 237 Mya to 2.58 Mya. No occurrence read is dated outside 241.464 Mya to 11.7 ka.

Middle Triassic — about 2 of 21 occurrencesLate Triassic — about 0 of 21 occurrencesEarly Jurassic — about 0 of 21 occurrencesMiddle Jurassic — about 0 of 21 occurrencesLate Jurassic — about 0 of 21 occurrencesEarly Cretaceous — about 0 of 21 occurrencesLate Cretaceous — about 0 of 21 occurrencesPaleocene — about 0 of 21 occurrencesEocene — about 0 of 21 occurrencesOligocene — about 0 of 21 occurrencesMiocene — about 2 of 21 occurrencesPliocene — about 7 of 21 occurrencesPleistocene — about 10 of 21 occurrences246–238 Mya — about 2 occurrences238–230 Mya — about 0.5 occurrences16–8.2 Mya — about 2 occurrences8.2–0 Mya — about 17 occurrences237 Mya2.58 Mya246 Mya0 Mya

21 occurrences of Umbonium on record. 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

21 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

11 formations

Toukoshan — 24.47°N, 120.72°EAkasawa Silt — 34.67°N, 137.25°ETentokuji — 39.75°N, 140.41°ESchlern — 46.51°N, 11.57°EVigo — 13.00°N, 122.00°ECabatuan — 10.86°N, 122.50°EDingle — 11.16°N, 122.62°EUlian — 11.03°N, 122.48°ELower Menkrawit — 1.50°N, 116.50°EToshima Sand — 34.62°N, 137.22°EAnanai — 33.43°N, 133.97°E

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The named rock units Umbonium has been recovered from, largest first. Drawn where the rock is now, not where it formed. 5 occurrences have no formation on record, which is common for older literature.

Found in the same rock

340 taxa

The Paleobiology Database records 13 sites for Umbonium, 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

10 references

Each of the 21 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. 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 Umbonium

Credit
星組背番号10
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Umbonium was found in Sketchfab.

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 itUmboniini through timeThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Link 1807