Trochoidea

Trochoidea is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the subfamily Helicellinae of the family Geomitridae. The name means "those that are shaped like a top".

Trochoidea

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

Time the record covers

At least 445 million years on record.

The record covers at least 445.2 Mya to 11.7 ka. No occurrence read is dated outside 452.8 Mya to 0 Mya.

Ordovician — about 1 of 6383 occurrencesSilurian — about 0 of 6383 occurrencesDevonian — about 18 of 6383 occurrencesDevonianCarboniferous — about 40 of 6383 occurrencesCarboniferousPermian — about 84 of 6383 occurrencesPermianEarly Triassic — about 41 of 6383 occurrencesMiddle Triassic — about 41 of 6383 occurrencesLate Triassic — about 205 of 6383 occurrencesEarly Jurassic — about 194 of 6383 occurrencesMiddle Jurassic — about 196 of 6383 occurrencesLate Jurassic — about 88 of 6383 occurrencesEarly Cretaceous — about 274 of 6383 occurrencesEarly CretaceousLate Cretaceous — about 263 of 6383 occurrencesPaleocene — about 172 of 6383 occurrencesEocene — about 571 of 6383 occurrencesOligocene — about 235 of 6383 occurrencesMiocene — about 1083 of 6383 occurrencesPliocene — about 835 of 6383 occurrencesPleistocene — about 1910 of 6383 occurrences462–446 Mya — about 0.8 occurrences446–431 Mya — about 0.2 occurrences416–400 Mya — about 1 occurrence400–385 Mya — about 8 occurrences385–369 Mya — about 8 occurrences369–354 Mya — about 7 occurrences354–339 Mya — about 14 occurrences339–323 Mya — about 10 occurrences323–308 Mya — about 9 occurrences308–293 Mya — about 4 occurrences293–277 Mya — about 26 occurrences277–262 Mya — about 44 occurrences262–246 Mya — about 53 occurrences246–231 Mya — about 159 occurrences231–216 Mya — about 26 occurrences216–200 Mya — about 81 occurrences200–185 Mya — about 155 occurrences185–169 Mya — about 57 occurrences169–154 Mya — about 186 occurrences154–139 Mya — about 62 occurrences139–123 Mya — about 59 occurrences123–108 Mya — about 169 occurrences108–92 Mya — about 121 occurrences92–77 Mya — about 69 occurrences77–62 Mya — about 206 occurrences62–46 Mya — about 223 occurrences46–31 Mya — about 504 occurrences31–15 Mya — about 565 occurrences15–0 Mya — about 3559 occurrences445.2 Mya11.7 ka462 Mya0 Mya

6,383 occurrences of Trochoidea 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

6,383 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

725 formations

Palos Verdes Sand — 33.80°N, 118.16°WPalos Verdes Sand — 33.99°N, 118.45°WPalos Verdes Sand — 33.60°N, 117.88°WPalos Verdes Sand — 33.71°N, 118.27°WPalos Verdes Sand — 33.76°N, 118.28°WPalos Verdes Sand — 33.66°N, 117.94°WCassian — 46.68°N, 12.15°ECassian — 46.54°N, 11.62°ECassian — 46.51°N, 11.96°ECassian — 46.64°N, 12.20°ECassian — 46.53°N, 11.92°ECassian — 46.54°N, 12.25°ECassian — 46.57°N, 11.94°ECassian — 46.62°N, 11.83°ECassian — 46.60°N, 12.26°EUnnamed — 33.24°N, 119.51°WUnnamed — 33.24°N, 119.55°WLomita Marl — 33.75°N, 118.30°WLomita Marl — 33.74°N, 118.28°WBowden — 17.88°N, 76.28°WCook Mountain — 31.29°N, 86.56°WCook Mountain — 31.31°N, 86.48°WCook Mountain — 32.32°N, 89.03°WCook Mountain — 32.32°N, 89.16°WCook Mountain — 32.04°N, 88.73°WCook Mountain — 32.35°N, 92.72°WCook Mountain — 32.10°N, 88.86°WCook Mountain — 31.60°N, 87.55°WCook Mountain — 32.17°N, 88.83°WCook Mountain — 32.51°N, 92.12°WCook Mountain — 31.35°N, 95.51°WCook Mountain — 30.30°N, 96.96°WCook Mountain — 31.12°N, 95.90°WCook Mountain — 30.63°N, 96.56°WCook Mountain — 31.20°N, 95.73°WCook Mountain — 31.25°N, 95.72°WCook Mountain — 30.63°N, 96.54°WCook Mountain — 30.07°N, 97.08°WCook Mountain — 29.99°N, 97.09°WMare — 10.00°N, 64.00°WMare — 10.00°N, 71.00°WMare — 10.61°N, 63.52°WMare — 10.64°N, 64.11°WGosport Sand — 31.52°N, 87.90°WGosport Sand — 31.54°N, 87.52°WGosport Sand — 31.50°N, 87.80°WGosport Sand — 31.13°N, 87.93°WGosport Sand — 31.63°N, 88.02°WSan Pedro Sand — 33.74°N, 118.28°WSan Pedro Sand — 33.77°N, 118.31°WTimms Point Silt — 33.73°N, 118.28°WPico — 34.36°N, 118.56°WPico — 34.33°N, 118.72°WPico — 33.94°N, 117.89°WPico — 34.43°N, 118.70°WPico — 34.34°N, 118.47°WPico — 34.35°N, 118.52°WCaloosahatchee — 26.89°N, 82.01°WCaloosahatchee — 26.75°N, 81.51°WCaloosahatchee — 27.34°N, 82.42°WCaloosahatchee — 26.75°N, 80.93°WCaloosahatchee — 26.96°N, 81.99°WCaloosahatchee — 27.77°N, 82.68°WCaloosahatchee — 26.80°N, 81.37°WCaloosahatchee — 26.96°N, 81.17°WDiscovery Point — 29.00°N, 118.27°WDiscovery Point — 29.00°N, 118.23°WDiscovery Point — 29.10°N, 118.25°WDiscovery Point — 28.88°N, 118.29°WDiscovery Point — 29.07°N, 118.23°WQuaternary terrace — 33.75°N, 118.33°WQuaternary terrace — 33.76°N, 118.35°WQuaternary terrace — 33.75°N, 118.30°WQuaternary terrace — 33.74°N, 118.41°WHiraiga — 39.94°N, 141.95°EHiraiga — 39.83°N, 141.98°EHiraiga — 39.82°N, 141.88°EChipola — 30.57°N, 85.84°WChipola — 30.44°N, 85.19°WChipola — 30.43°N, 84.98°WChipola — 30.47°N, 84.99°WChari — 23.50°N, 70.50°ETermofourà — 45.05°N, 7.80°ETermofourà — 45.04°N, 7.77°EFalun de Jeurs — 48.48°N, 2.23°ETalparo — 10.67°N, 61.07°WDry Creek Sands — 34.70°S, 138.62°EDry Creek Sands — 34.75°S, 138.68°EDry Creek Sands — 34.89°S, 138.56°EUpper Kalibeng — 7.49°S, 110.00°EUpper Kalibeng — 7.37°S, 111.32°ECareaga Sandstone — 34.88°N, 120.51°WCareaga Sandstone — 34.84°N, 120.41°WCareaga Sandstone — 34.90°N, 120.32°WCareaga Sandstone — 34.74°N, 120.41°WProvidence — 31.78°N, 85.14°WProvidence — 31.75°N, 85.12°WProvidence — 31.80°N, 85.00°WProvidence — 31.89°N, 85.21°W

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The named rock units Trochoidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 701 further formations hold fewer occurrences each and are not listed. 2,253 occurrences have no formation on record, which is common for older literature.

Trochoidea and its relatives

Pleistocene

Where Trochoidea and its relatives were recorded in the Pleistocene.

Found in the same rock

2,938 taxa

The Paleobiology Database records at least 1,039 sites for Trochoidea, and this reads 240 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

991 references

Each of the 6,383 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. 979 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 content1

Picture of Trochoidea

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

No 3D scan of Trochoidea was found in MorphoSource and Sketchfab.

Smithsonian Open Access 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 itVetigastropoda through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Rafinesque 1815