Planorbella

Planorbella is a genus of freshwater air-breathing snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails, or planorbids, which all have sinistral, or left-coiling, shells. The Planorbella genus is not known to be colonial but are very plentiful and occur in large groupings. This genus is commonly found within North America, and is also found within various countries in Europe, including Iceland, Spain, Germany, France, Ukraine, and others. Over time, an increased amount of unintentional releases of the snails has led to Planorbella being found in more non-native areas like Siberia. Some of the earliest fossil records date back to the Miocene.

Planorbella

Uncredited · Public Domain · 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 2.5 million years on record.

The record covers at least 2.58 Mya to 11.7 ka. No occurrence read is dated outside 5.333 Mya to 0 Mya.

Miocene — about 0 of 29 occurrencesPliocene — about 1 of 29 occurrencesPliocenePleistocene — about 26 of 29 occurrencesPleistoceneHolocene — about 2 of 29 occurrences5.4–5.3 Mya — about 0.0 occurrences5.3–5.1 Mya — about 0.1 occurrences5.1–4.9 Mya — about 0.1 occurrences4.9–4.7 Mya — about 0.1 occurrences4.7–4.5 Mya — about 0.1 occurrences4.5–4.3 Mya — about 0.1 occurrences4.3–4.1 Mya — about 0.1 occurrences4.1–3.9 Mya — about 0.1 occurrences3.9–3.7 Mya — about 0.1 occurrences3.7–3.5 Mya — about 0.1 occurrences3.5–3.3 Mya — about 0.1 occurrences3.3–3.1 Mya — about 0.1 occurrences3.1–2.9 Mya — about 0.1 occurrences2.9–2.7 Mya — about 0.1 occurrences2.7–2.5 Mya — about 0.4 occurrences2.5–2.3 Mya — about 1 occurrence2.3–2.1 Mya — about 1 occurrence2.1–1.9 Mya — about 1 occurrence1.9–1.8 Mya — about 1 occurrence1.8–1.6 Mya — about 1 occurrence1.6–1.4 Mya — about 1 occurrence1.4–1.2 Mya — about 1 occurrence1.2–972 ka Mya — about 1 occurrence972 ka–778 ka Mya — about 1 occurrence778 ka–583 ka Mya — about 2 occurrences583 ka–389 ka Mya — about 2 occurrences389 ka–194 ka Mya — about 2 occurrences194 ka–0 Mya — about 11 occurrences2.58 Mya11.7 ka5.8 Mya0 Mya

29 occurrences of Planorbella on record, most of them in the Pleistocene. 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

29 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

3 formations

Fort Thompson — 27.72°N, 82.43°WFort Thompson — 26.76°N, 81.44°WBermont — 27.70°N, 82.50°WBermont — 27.72°N, 82.43°WAlturas — 40.16°N, 120.27°W

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The named rock units Planorbella has been recovered from, largest first. Drawn where the rock is now, not where it formed. 19 occurrences have no formation on record, which is common for older literature.

Planorbella and its relatives

Pleistocene

Where Planorbella and its relatives were recorded in the Pleistocene.

Found in the same rock

418 taxa

The Paleobiology Database records 22 sites for Planorbella, 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

7 references

Each of the 29 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content1

Picture of Planorbella

Credit
nobody named on the record
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Planorbella 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 itPlanorbidae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0.