Semicassis granulata

The Scotch bonnet is a medium-sized to large species of sea snail, a marine gastropod mollusk in the subfamily Cassinae, the helmet shells and bonnet shells. The common name "Scotch bonnet" alludes to the general outline and color pattern of the shell, which vaguely resemble a tam o' shanter, a traditional Scottish bonnet or cap. The shell is egg-shaped and fairly large, 2 to 4 inches in maximum dimension, with a regular pattern of yellow, orange or brown squarish spots. The surface sculpture of the shell is highly variable: the surface can be smooth and polished, have grooves, be granulated, or even be nodulose on the shoulder of the whorls.

Semicassis granulata

H. Zell · 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
SemicassisPBDB
Diet
carnivorePBDB, for Cassidae
Life habit
epifaunalPBDB, for Cassidae
Motility
actively mobilePBDB, for Cassidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 7.2 million years on record.

The record covers at least 7.246 Mya to 11.7 ka. No occurrence read is dated outside 11.63 Mya to 0 Mya.

Miocene — about 5 of 25 occurrencesMiocenePliocene — about 13 of 25 occurrencesPliocenePleistocene — about 5 of 25 occurrencesPleistoceneHolocene — about 2 of 25 occurrences12–11 Mya — about 0.1 occurrences11–11 Mya — about 0.2 occurrences11–11 Mya — about 0.2 occurrences11–10 Mya — about 0.2 occurrences10–9.7 Mya — about 0.2 occurrences9.7–9.3 Mya — about 0.2 occurrences9.3–8.9 Mya — about 0.2 occurrences8.9–8.5 Mya — about 0.2 occurrences8.5–8.1 Mya — about 0.2 occurrences8.1–7.7 Mya — about 0.2 occurrences7.7–7.3 Mya — about 0.2 occurrences7.3–6.9 Mya — about 0.6 occurrences6.9–6.5 Mya — about 0.6 occurrences6.5–6.1 Mya — about 0.6 occurrences6.1–5.7 Mya — about 0.6 occurrences5.7–5.3 Mya — about 0.7 occurrences5.3–4.9 Mya — about 0.9 occurrences4.9–4.4 Mya — about 0.9 occurrences4.4–4.0 Mya — about 0.9 occurrences4.0–3.6 Mya — about 0.9 occurrences3.6–3.2 Mya — about 3 occurrences3.2–2.8 Mya — about 4 occurrences2.8–2.4 Mya — about 2 occurrences2.4–2.0 Mya — about 0.2 occurrences2.0–1.6 Mya — about 0.2 occurrences1.6–1.2 Mya — about 0.2 occurrences1.2–809 ka Mya — about 0.2 occurrences809 ka–404 ka Mya — about 1 occurrence404 ka–0 Mya — about 5 occurrences7.246 Mya11.7 ka12.1 Mya0 Mya

25 occurrences of Semicassis granulata on record, most of them in the Pliocene. 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

25 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

12 formations

Mare — 10.00°N, 64.00°WMare — 10.61°N, 63.52°WMare — 10.64°N, 64.11°WShark Hole Point — 9.04°N, 81.75°WShark Hole Point — 9.06°N, 81.78°WNancy Point — 9.15°N, 81.95°WNancy Point — 9.14°N, 81.95°WBermont — 26.38°N, 80.71°WMoin — 10.00°N, 83.03°WCayo Agua — 9.14°N, 82.01°WNew Orleans Barrier Trend — 30.05°N, 89.96°WAraya — 10.62°N, 64.00°WChagres Sandstone — 9.17°N, 80.28°WCaloosahatchee — 26.52°N, 82.03°WGatun — 9.36°N, 79.84°WFort Thompson — 26.76°N, 81.44°W

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The named rock units Semicassis granulata has been recovered from, largest first. Drawn where the rock is now, not where it formed. 2 occurrences have no formation on record, which is common for older literature.

Semicassis granulata and its relatives

Pliocene

Where Semicassis granulata and its relatives were recorded in the Pliocene.

Found in the same rock

356 taxa

The Paleobiology Database records 7 sites for Semicassis granulata, 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 25 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 content2

Picture of Semicassis granulata

Credit
H. Zell
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

MorphoSource 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 itSemicassis through timeFormations of the PlioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Born 1778)