Discus

Discus is a genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Discidae, the disk snails.

Discus

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
Also called
disk snailPBDB
Sits inside
DiscidaePBDB
Life habit
epifaunalPBDB, for Gastropoda
Motility
actively mobilePBDB, for Pulmonata
Vision
limitedPBDB, for Gastropoda
Environment
terrestrialPBDB, for Pulmonata

Time the record covers

At least 113 million years on record.

The record covers at least 113.2 Mya to 11.7 ka. No occurrence read is dated outside 121.4 Mya to 0 Mya.

Early Cretaceous — about 3 of 31 occurrencesEarly CretaceousLate Cretaceous — about 0 of 31 occurrencesPaleocene — about 0 of 31 occurrencesEocene — about 1 of 31 occurrencesEoceneOligocene — about 0 of 31 occurrencesOligoceneMiocene — about 18 of 31 occurrencesMiocenePliocene — about 0 of 31 occurrencesPleistocene — about 7 of 31 occurrences124–120 Mya — about 0.4 occurrences120–116 Mya — about 2 occurrences116–111 Mya — about 1.0 occurrences58–54 Mya — about 0.5 occurrences54–50 Mya — about 0.5 occurrences29–25 Mya — about 0.2 occurrences25–21 Mya — about 1 occurrence21–17 Mya — about 0.9 occurrences17–12 Mya — about 11 occurrences12–8.3 Mya — about 4 occurrences8.3–4.1 Mya — about 0.4 occurrences4.1–0 Mya — about 9 occurrences113.2 Mya11.7 ka124 Mya0 Mya

31 occurrences of Discus 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

31 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

10 formations

Upper Freshwater Molasse — 48.66°N, 10.23°EUpper Freshwater Molasse — 48.63°N, 11.80°ERandeck Maar — 48.57°N, 9.53°EWillwood — 44.30°N, 109.00°WSappa — 39.80°N, 98.10°WDalazi — 42.65°N, 129.61°ELaiyang — 36.78°N, 120.67°ELushangfen — 39.78°N, 116.11°EEdelény — 48.39°N, 20.64°EDeep River — 46.63°N, 111.06°WOber Süßwassermolasse — 48.63°N, 11.80°E

Loading coastlines…

The named rock units Discus 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.

Discus and its relatives

Miocene

Where Discus and its relatives were recorded in the Miocene.

Found in the same rock

910 taxa

The Paleobiology Database records 25 sites for Discus, 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

23 references

Each of the 31 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. 11 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 content4

Picture of Discus

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

3D scan

Licence
CC0 — this site’s default, not the record’s
Commercial use
the licence allows it
Specimen
Unio discus

CT scan

Licence
In Copyright
Commercial use
cannot be read from the licence given — check the record
Specimen
Acestridium discus · MCZ:Ich:88581

3D model

Source
Sketchfab
Licence
CC0 Public Domain
Commercial use
the licence allows it

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 itDiscidae through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Fitzinger 1833