Helicodiscus

Helicodiscus is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Helicodiscidae.

Helicodiscus

W. H. Dall (1845-1927) · 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
HelicodiscidaePBDB
Life habit
epifaunalPBDB, for Gastropoda
Motility
actively mobilePBDB, for Gastropoda
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 12 million years on record.

The record covers at least 12.75 Mya to 129 ka. No occurrence read is dated outside 13.82 Mya to 11.7 ka.

Miocene — about 11 of 21 occurrencesMiocenePliocene — about 0 of 21 occurrencesPliocenePleistocene — about 10 of 21 occurrencesPleistocene14–13 Mya — about 0.8 occurrences13–13 Mya — about 0.9 occurrences13–12 Mya — about 0.3 occurrences11–11 Mya — about 0.2 occurrences11–11 Mya — about 0.7 occurrences11–10 Mya — about 0.7 occurrences10–9.5 Mya — about 0.5 occurrences9.5–9.1 Mya — about 0.1 occurrences9.1–8.6 Mya — about 0.1 occurrences8.6–8.1 Mya — about 0.1 occurrences8.1–7.6 Mya — about 0.1 occurrences7.6–7.2 Mya — about 0.4 occurrences7.2–6.7 Mya — about 2 occurrences6.7–6.2 Mya — about 2 occurrences6.2–5.7 Mya — about 2 occurrences5.7–5.3 Mya — about 1 occurrence5.3–4.8 Mya — about 0.1 occurrences4.8–4.3 Mya — about 0.0 occurrences1.4–955 ka Mya — about 0.7 occurrences955 ka–477 ka Mya — about 0.8 occurrences477 ka–0 Mya — about 8 occurrences12.75 Mya129 ka14.3 Mya0 Mya

21 occurrences of Helicodiscus 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

21 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

4 formations

facies à Congeria — 45.05°N, 7.93°ESappa — 39.80°N, 98.10°WShuler — 32.71°N, 96.71°WEdelény — 48.39°N, 20.64°E

Loading coastlines…

The named rock units Helicodiscus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 12 occurrences have no formation on record, which is common for older literature.

Helicodiscus and its relatives

Miocene

Where Helicodiscus and its relatives were recorded in the Miocene.

Found in the same rock

773 taxa

The Paleobiology Database records 19 sites for Helicodiscus, 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

14 references

Each of the 21 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. 2 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 Helicodiscus

Credit
W. H. Dall (1845-1927)
Licence
Public Domain
Commercial use
the licence allows it

No 3D scan of Helicodiscus 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 itHelicodiscidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Morse 1864