Trochus

Trochus is a genus of medium-to large-sized, top-shaped sea snails with an operculum, of the family Trochidae, the top snails.

Trochus

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
TrochidaePBDB
Diet
grazerPBDB, for Trochidae
Life habit
epifaunalPBDB, for Trochidae
Motility
actively mobilePBDB, for Trochidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 358 million years on record.

The record covers at least 358.86 Mya to 11.7 ka. No occurrence read is dated outside 372.15 Mya to 0 Mya.

Devonian — about 1 of 366 occurrencesCarboniferous — about 0 of 366 occurrencesPermian — about 4 of 366 occurrencesPermianEarly Triassic — about 0 of 366 occurrencesMiddle Triassic — about 3 of 366 occurrencesLate Triassic — about 26 of 366 occurrencesLate TriassicEarly Jurassic — about 11 of 366 occurrencesMiddle Jurassic — about 15 of 366 occurrencesLate Jurassic — about 8 of 366 occurrencesEarly Cretaceous — about 52 of 366 occurrencesEarly CretaceousLate Cretaceous — about 19 of 366 occurrencesLate CretaceousPaleocene — about 10 of 366 occurrencesEocene — about 45 of 366 occurrencesOligocene — about 3 of 366 occurrencesMiocene — about 50 of 366 occurrencesPliocene — about 21 of 366 occurrencesPleistocene — about 96 of 366 occurrences380–367 Mya — about 0.4 occurrences367–354 Mya — about 0.6 occurrences278–266 Mya — about 1 occurrence266–253 Mya — about 3 occurrences253–240 Mya — about 3 occurrences240–228 Mya — about 19 occurrences228–215 Mya — about 2 occurrences215–202 Mya — about 4 occurrences202–190 Mya — about 10 occurrences190–177 Mya — about 2 occurrences177–164 Mya — about 9 occurrences164–152 Mya — about 12 occurrences152–139 Mya — about 3 occurrences139–127 Mya — about 8 occurrences127–114 Mya — about 23 occurrences114–101 Mya — about 20 occurrences101–89 Mya — about 9 occurrences89–76 Mya — about 6 occurrences76–63 Mya — about 7 occurrences63–51 Mya — about 8 occurrences51–38 Mya — about 36 occurrences38–25 Mya — about 11 occurrences25–13 Mya — about 20 occurrences13–0 Mya — about 149 occurrences358.86 Mya11.7 ka380 Mya0 Mya

366 occurrences of Trochus 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

366 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

96 formations

Cassian — 46.57°N, 11.94°ECassian — 46.55°N, 11.93°EKoronia — 35.08°N, 33.17°EKoronia — 35.03°N, 33.15°EKoronia — 35.05°N, 33.10°EKoronia — 35.05°N, 33.05°EPerte du Rhône — 46.83°N, 6.52°ERed Crag — 51.97°N, 1.35°ERed Crag — 51.85°N, 1.28°EWaimanalo — 21.35°N, 158.12°WWaimanalo — 21.45°N, 157.72°WWaimanalo — 21.27°N, 157.75°WWaimanalo — 21.35°N, 157.90°WWaimanalo — 21.33°N, 157.70°WTuwaiq Mt.Lst. — 23.08°N, 46.33°ETuwaiq Mt.Lst. — 25.37°N, 45.50°ETuwaiq Mt.Lst. — 25.78°N, 45.25°EMonte Vaticano — 41.90°N, 12.45°EBarton Beds — 51.28°N, 0.63°WBarton Beds — 50.74°N, 1.69°WAldabra Limestone — 9.42°S, 46.45°EVuache — 46.83°N, 6.52°ESobe — 26.40°N, 127.73°EUpper Kalibeng — 7.49°S, 110.00°EUpper Kalibeng — 7.37°S, 111.32°EFaluns de la Touraine — 47.40°N, 1.23°ECalcare di Zu — 45.85°N, 9.42°ECephalopod Limestone — 10.30°S, 123.71°ECephalopod Limestone — 9.83°S, 124.57°ESables a Nummulites variolarius — 49.25°N, 2.50°ETataouine — 33.00°N, 10.47°EQingyan — 26.33°N, 106.68°ECalcaire de Caen — 48.97°N, 0.13°WRyukyu Limestone — 24.38°N, 124.22°EGelingseh — 0.98°N, 117.97°ESan Julian — 46.87°S, 66.95°WSan Julian — 47.08°S, 66.70°WDhruma — 24.23°N, 46.58°EDhruma — 23.97°N, 46.17°EHanifa — 23.90°N, 46.28°EHanifa — 23.08°N, 46.53°E

Loading coastlines…

The named rock units Trochus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 72 further formations hold fewer occurrences each and are not listed. 181 occurrences have no formation on record, which is common for older literature.

Trochus and its relatives

Pleistocene

Where Trochus and its relatives were recorded in the Pleistocene.

Found in the same rock

5,375 taxa

The Paleobiology Database records 188 sites for Trochus, 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

144 references

Each of the 366 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. 132 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 content3

Picture of Trochus

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

Structured light scan

Licence
not stated by the source
Commercial use
cannot be read from the licence given — check the record
Specimen
Trochus maculatus · PSAL:ARCH:1

3D model

Source
Sketchfab
Licence
CC Attribution
Commercial use
cannot be read from the licence given — check the record

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 itTrochidae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Linnaeus 1758