Assiminea

Assiminea is a genus of minute, salt-tolerant snails with an operculum, aquatic gastropod mollusks, or micromollusks, in the family Assimineidae.

Assiminea

Erik Veldhuis; Modified by Tom Meijer · CC BY-SA 3.0 · 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
AssimineidaePBDB
Life habit
epifaunalPBDB, for Gastropoda
Motility
actively mobilePBDB, for Gastropoda
Vision
limitedPBDB, for Gastropoda
Environment
marine,brackish,freshwater,terrestrialPBDB, for Assimineidae

Time the record covers

At least 168 million years on record.

The record covers at least 168.2 Mya to 11.7 ka. No occurrence read is dated outside 170.9 Mya to 0 Mya.

Middle Jurassic — about 1 of 23 occurrencesLate Jurassic — about 0 of 23 occurrencesEarly Cretaceous — about 0 of 23 occurrencesLate Cretaceous — about 1 of 23 occurrencesLate CretaceousPaleocene — about 0 of 23 occurrencesEocene — about 0 of 23 occurrencesOligocene — about 1 of 23 occurrencesMiocene — about 1 of 23 occurrencesMiocenePliocene — about 3 of 23 occurrencesPleistocene — about 15 of 23 occurrences174–169 Mya — about 0.9 occurrences169–163 Mya — about 0.1 occurrences105–99 Mya — about 0.3 occurrences99–93 Mya — about 0.7 occurrences29–23 Mya — about 0.6 occurrences23–17 Mya — about 1 occurrence17–12 Mya — about 0.2 occurrences5.8–0 Mya — about 19 occurrences168.2 Mya11.7 ka174 Mya0 Mya

23 occurrences of Assiminea on record, most of them in the Pleistocene. 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

23 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

11 formations

Unnamed — 33.24°N, 119.51°WBowden — 17.88°N, 76.28°WSakishima — 34.37°N, 136.82°EArcadia — 27.89°N, 82.48°WVarswater — 32.97°S, 18.15°EBredasdorp — 33.88°S, 18.45°EMare — 10.61°N, 63.52°WZhanghe — 25.17°N, 102.01°EQuaternary terrace — 33.75°N, 118.33°WSan Pedro Sand — 33.74°N, 118.28°WPalos Verdes Sand — 33.60°N, 117.88°W

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The named rock units Assiminea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 9 occurrences have no formation on record, which is common for older literature.

Assiminea and its relatives

Pleistocene

Where Assiminea and its relatives were recorded in the Pleistocene.

Found in the same rock

1,354 taxa

The Paleobiology Database records 12 sites for Assiminea, 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 23 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 content2

Picture of Assiminea

Credit
Erik Veldhuis; Modified by Tom Meijer
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

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

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 itAssimineidae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Fleming 1828