Anisus

Anisus is a genus of small air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the subfamily Planorbinae of the family Planorbidae, the ramshorn snails and their allies.

Anisus

Francisco Welter Schultes · CC BY-SA 2.5 · 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
PlanorbidaePBDB
Life habit
epifaunalPBDB, for Gastropoda
Motility
actively mobilePBDB, for Gastropoda
Vision
limitedPBDB, for Gastropoda
Environment
freshwaterPBDB, for Planorbidae

Time the record covers

At least 45 million years on record.

The record covers at least 45.9 Mya to 11.7 ka. No occurrence read is dated outside 56 Mya to 0 Mya.

Paleocene — about 0 of 36 occurrencesEocene — about 3 of 36 occurrencesEoceneOligocene — about 0 of 36 occurrencesMiocene — about 17 of 36 occurrencesMiocenePliocene — about 5 of 36 occurrencesPleistocene — about 9 of 36 occurrences57–55 Mya — about 0.1 occurrences55–53 Mya — about 0.2 occurrences53–51 Mya — about 0.2 occurrences51–50 Mya — about 0.5 occurrences50–48 Mya — about 0.5 occurrences48–46 Mya — about 0.5 occurrences46–44 Mya — about 0.2 occurrences44–42 Mya — about 0.2 occurrences42–40 Mya — about 0.2 occurrences40–38 Mya — about 0.2 occurrences38–36 Mya — about 0.2 occurrences36–34 Mya — about 0.2 occurrences34–32 Mya — about 0.0 occurrences25–23 Mya — about 0.1 occurrences23–21 Mya — about 0.7 occurrences21–19 Mya — about 0.2 occurrences15–13 Mya — about 0.8 occurrences13–11 Mya — about 2 occurrences11–9.5 Mya — about 7 occurrences9.5–7.6 Mya — about 5 occurrences7.6–5.7 Mya — about 1 occurrence5.7–3.8 Mya — about 1 occurrence3.8–1.9 Mya — about 7 occurrences1.9–0 Mya — about 8 occurrences45.9 Mya11.7 ka57 Mya0 Mya

36 occurrences of Anisus 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

36 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

Afyon — 39.00°N, 31.00°ESajovolgyi — 47.97°N, 19.69°EEdelény — 48.39°N, 20.64°EOlduvai — 2.99°S, 35.35°EKarterit Cliff — 0.50°S, 36.15°EFalun de Saucats — 44.66°N, 0.57°WBridger — 42.70°N, 110.10°W

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The named rock units Anisus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 26 occurrences have no formation on record, which is common for older literature.

Anisus and its relatives

Miocene

Where Anisus and its relatives were recorded in the Miocene.

Found in the same rock

542 taxa

The Paleobiology Database records 30 sites for Anisus, 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

17 references

Each of the 36 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. 5 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 Anisus

Credit
Francisco Welter Schultes
Licence
CC BY-SA 2.5
Commercial use
the licence allows it

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itPlanorbidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Studer 1820