Semicassis

Semicassis is a genus of medium-sized predatory sea snails, marine gastropod molluscs in the subfamily Cassinae within the family Cassidae, the helmet snails and bonnet snails.

Semicassis

Pino Bucca · 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
PhaliinaePBDB
Diet
carnivorePBDB, for Cassidae
Life habit
epifaunalPBDB, for Cassidae
Motility
actively mobilePBDB, for Cassidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 55 million years on record.

The record covers at least 56 Mya to 11.7 ka. No occurrence read is dated outside 66 Mya to 0 Mya.

Late Cretaceous — about 0 of 344 occurrencesPaleocene — about 1 of 344 occurrencesPaleoceneEocene — about 44 of 344 occurrencesEoceneOligocene — about 16 of 344 occurrencesOligoceneMiocene — about 182 of 344 occurrencesMiocenePliocene — about 64 of 344 occurrencesPleistocene — about 33 of 344 occurrences67–65 Mya — about 0.1 occurrences65–63 Mya — about 0.2 occurrences63–61 Mya — about 0.2 occurrences61–58 Mya — about 0.2 occurrences58–56 Mya — about 0.2 occurrences56–54 Mya — about 2 occurrences54–52 Mya — about 2 occurrences52–49 Mya — about 2 occurrences49–47 Mya — about 5 occurrences47–45 Mya — about 10 occurrences45–43 Mya — about 10 occurrences43–40 Mya — about 8 occurrences40–38 Mya — about 3 occurrences38–36 Mya — about 1 occurrence36–34 Mya — about 2 occurrences34–31 Mya — about 4 occurrences31–29 Mya — about 4 occurrences29–27 Mya — about 4 occurrences27–25 Mya — about 2 occurrences25–22 Mya — about 4 occurrences22–20 Mya — about 12 occurrences20–18 Mya — about 22 occurrences18–16 Mya — about 21 occurrences16–13 Mya — about 18 occurrences13–11 Mya — about 19 occurrences11–9.0 Mya — about 30 occurrences9.0–6.7 Mya — about 33 occurrences6.7–4.5 Mya — about 42 occurrences4.5–2.2 Mya — about 52 occurrences2.2–0 Mya — about 32 occurrences56 Mya11.7 ka67 Mya0 Mya

344 occurrences of Semicassis 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

344 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

100 formations

Cercado — 19.46°N, 71.10°WCercado — 19.53°N, 71.20°WCercado — 19.53°N, 71.27°WCercado — 19.30°N, 71.67°WCercado — 18.93°N, 71.62°WCercado — 19.58°N, 71.04°WGurabo — 19.48°N, 70.98°WGurabo — 19.53°N, 71.33°WGurabo — 19.30°N, 71.67°WGurabo — 19.58°N, 71.05°WGurabo — 19.30°N, 70.50°WGurabo — 19.50°N, 71.18°WGurabo — 18.93°N, 71.62°WLlajas — 34.31°N, 118.67°WLlajas — 34.32°N, 118.63°WByram — 32.01°N, 89.38°WByram — 32.18°N, 90.25°WByram — 32.32°N, 90.86°WByram — 32.48°N, 90.80°WByram — 32.41°N, 90.84°WByram — 32.12°N, 90.53°WGatun — 9.35°N, 79.81°WGatun — 9.35°N, 79.83°WGatun — 9.26°N, 79.92°WTermofourà — 45.05°N, 7.80°ETermofourà — 45.04°N, 7.77°EScripps — 32.84°N, 117.22°WBerada — 51.10°N, 5.80°ENavidad — 33.95°S, 71.75°WNavidad — 33.94°S, 71.85°WNavidad — 44.65°S, 74.58°WBaldissero — 45.03°N, 7.76°EBaldissero — 45.03°N, 7.75°ECayo Agua — 9.18°N, 82.05°WCayo Agua — 9.14°N, 82.01°WCayo Agua — 9.15°N, 82.03°WMare — 10.00°N, 64.00°WMare — 10.61°N, 63.52°WMare — 10.64°N, 64.11°WBowden — 17.88°N, 76.28°WArmuelles — 8.27°N, 82.87°WArmuelles — 8.27°N, 81.97°WArmuelles — 8.18°N, 82.87°WChipola — 30.44°N, 85.19°WChipola — 30.46°N, 85.16°WChipola — 30.50°N, 85.12°WShark Hole Point — 9.04°N, 81.75°WShark Hole Point — 9.06°N, 81.78°WTogopi — 5.50°N, 117.00°EQuilon Limestone — 8.87°N, 76.59°EQuilon Limestone — 9.25°N, 76.50°EBaghmara — 25.17°N, 90.67°EBaghmara — 25.27°N, 90.23°ENari — 26.36°N, 67.86°ENari — 26.14°N, 66.79°ETuatua Limestone — 16.80°S, 178.88°ETuatua Limestone — 17.47°S, 177.05°EBaitoa — 19.30°N, 70.80°WBaitoa — 19.35°N, 70.70°WNancy Point — 9.15°N, 81.95°WNancy Point — 9.14°N, 81.95°WCantaure — 11.90°N, 69.85°W

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The named rock units Semicassis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 76 further formations hold fewer occurrences each and are not listed. 55 occurrences have no formation on record, which is common for older literature.

Semicassis and its relatives

Miocene

Where Semicassis and its relatives were recorded in the Miocene.

Found in the same rock

2,717 taxa

The Paleobiology Database records 152 sites for Semicassis, 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

101 references

Each of the 344 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. 89 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 Semicassis

Credit
Pino Bucca
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

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 itPhaliinae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Mörch 1852)