Truncatella

Truncatella is a genus of very small land snails with an operculum, terrestrial gastropod mollusks in the family Truncatellidae. These minute snails live in land habitats close to seawater. They walk with a looping action, and the adults have truncated shells. Many of the species are small enough to be considered micromollusks.

Truncatella

Auguste Le Roux · 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
TruncatellidaePBDB
Diet
grazerPBDB, for Truncatellidae
Life habit
epifaunalPBDB, for Truncatellidae
Motility
actively mobilePBDB, for Truncatellidae
Vision
limitedPBDB, for Gastropoda
Environment
freshwaterPBDB, for Truncatellidae

Time the record covers

At least 65 million years on record.

The record covers at least 66 Mya to 129 ka. No occurrence read is dated outside 72.2 Mya to 11.7 ka.

Late Cretaceous — about 3 of 18 occurrencesLate CretaceousPaleocene — about 0 of 18 occurrencesEocene — about 2 of 18 occurrencesEoceneOligocene — about 0 of 18 occurrencesMiocene — about 1 of 18 occurrencesMiocenePliocene — about 0 of 18 occurrencesPleistocene — about 12 of 18 occurrences74–71 Mya — about 0.5 occurrences71–69 Mya — about 1 occurrence69–66 Mya — about 1 occurrence66–64 Mya — about 0.1 occurrences49–47 Mya — about 0.4 occurrences47–44 Mya — about 0.7 occurrences44–42 Mya — about 0.7 occurrences42–39 Mya — about 0.2 occurrences25–22 Mya — about 0.4 occurrences22–20 Mya — about 0.6 occurrences4.9–2.5 Mya — about 0.2 occurrences2.5–0 Mya — about 12 occurrences66 Mya129 ka74 Mya0 Mya

18 occurrences of Truncatella 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

18 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

7 formations

Discovery Point — 29.00°N, 118.27°WDiscovery Point — 29.07°N, 118.24°WDiscovery Point — 28.97°N, 118.22°WJiaozhou — 36.27°N, 119.95°EBelmont — 32.33°N, 64.69°WFalun de Saucats — 44.66°N, 0.57°WRhodes — 36.42°N, 28.20°EFaluns de la Touraine — 47.40°N, 1.23°ESan Pedro Sand — 33.74°N, 118.28°W

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The named rock units Truncatella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 occurrences have no formation on record, which is common for older literature.

Truncatella and its relatives

Pleistocene

Where Truncatella and its relatives were recorded in the Pleistocene.

Found in the same rock

688 taxa

The Paleobiology Database records 13 sites for Truncatella, 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

13 references

Each of the 18 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. 1 further reference is 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 Truncatella

Credit
Auguste Le Roux
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Truncatella 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 itTruncatellidae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Risso 1826