Milacidae

Milacidae is a family of air-breathing, keeled, land slugs. These are shell-less terrestrial gastropod mollusks in the superfamily Parmacelloidea.

Milacidae

Michal Maňas · CC BY 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
ParmacelloideaPBDB
Life habit
epifaunalPBDB, for Gastropoda
Motility
actively mobilePBDB, for Gastropoda
Vision
limitedPBDB, for Gastropoda
Environment
terrestrialPBDB

Time the record covers

At least 36 million years on record.

The record covers at least 37.71 Mya to 774 ka. No occurrence read is dated outside 41.03 Mya to 11.7 ka.

Eocene — about 1 of 24 occurrencesEoceneOligocene — about 0 of 24 occurrencesMiocene — about 15 of 24 occurrencesMiocenePliocene — about 4 of 24 occurrencesPleistocene — about 4 of 24 occurrences42–40 Mya — about 0.2 occurrences40–39 Mya — about 0.4 occurrences39–38 Mya — about 0.4 occurrences24–22 Mya — about 0.1 occurrences22–21 Mya — about 0.2 occurrences21–20 Mya — about 0.2 occurrences20–18 Mya — about 0.2 occurrences18–17 Mya — about 0.4 occurrences17–15 Mya — about 0.9 occurrences14–13 Mya — about 2 occurrences9.8–8.4 Mya — about 0.4 occurrences8.4–7.0 Mya — about 2 occurrences7.0–5.6 Mya — about 7 occurrences5.6–4.2 Mya — about 3 occurrences4.2–2.8 Mya — about 2 occurrences2.8–1.4 Mya — about 2 occurrences1.4–0 Mya — about 3 occurrences37.71 Mya774 ka41.9 Mya0 Mya

24 occurrences of Milacidae 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

24 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

2 formations

facies à Congeria — 45.05°N, 7.93°ECreechbarrow Limestone — 50.65°N, 2.12°W

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The named rock units Milacidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 13 occurrences have no formation on record, which is common for older literature.

Milacidae and its relatives

Miocene

Where Milacidae and its relatives were recorded in the Miocene.

Found in the same rock

448 taxa

The Paleobiology Database records 24 sites for Milacidae, 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

10 references

Each of the 24 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. 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 Milacidae

Credit
Michal Maňas
Licence
CC BY 2.5
Commercial use
the licence allows it

No 3D scan of Milacidae 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 itParmacelloidea through timeFormations of the MioceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ellis 1926