Retusa obtusa

Retusa obtusa, common name Arctic barrel-bubble, is a species of very small head-shield sea snail or bubble shell, a marine gastropod mollusc in the family Retusidae.

Retusa obtusa

H. Zell · 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
RetusaPBDB
Diet
carnivorePBDB, for Retusidae
Life habit
epifaunalPBDB, for Retusidae
Motility
actively mobilePBDB, for Retusidae
Vision
limitedPBDB, for Gastropoda

Time the record covers

At least 762 thousand years on record.

The record covers at least 774 ka to 11.7 ka. No occurrence read is dated outside 2.58 Mya to 0 Mya.

Pliocene — about 0 of 11 occurrencesPleistocene — about 9 of 11 occurrencesPleistoceneHolocene — about 2 of 11 occurrences2.7–2.6 Mya — about 0.0 occurrences2.6–2.5 Mya — about 0.2 occurrences2.5–2.4 Mya — about 0.2 occurrences2.4–2.3 Mya — about 0.2 occurrences2.3–2.2 Mya — about 0.2 occurrences2.2–2.1 Mya — about 0.2 occurrences2.1–2.0 Mya — about 0.2 occurrences2.0–1.8 Mya — about 0.2 occurrences1.8–1.7 Mya — about 0.2 occurrences1.7–1.6 Mya — about 0.2 occurrences1.6–1.5 Mya — about 0.2 occurrences1.5–1.4 Mya — about 0.2 occurrences1.4–1.3 Mya — about 0.2 occurrences1.3–1.2 Mya — about 0.2 occurrences1.2–1.1 Mya — about 0.2 occurrences1.1–1.0 Mya — about 0.2 occurrences1.0–924 ka Mya — about 0.2 occurrences924 ka–821 ka Mya — about 0.2 occurrences821 ka–719 ka Mya — about 0.2 occurrences719 ka–616 ka Mya — about 0.2 occurrences616 ka–513 ka Mya — about 0.2 occurrences513 ka–411 ka Mya — about 0.2 occurrences411 ka–308 ka Mya — about 0.2 occurrences308 ka–205 ka Mya — about 0.2 occurrences205 ka–103 ka Mya — about 1 occurrence103 ka–0 Mya — about 5 occurrences774 ka11.7 ka3.08 Mya0 Mya

11 occurrences of Retusa obtusa 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

11 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

Kap Kobenhavn — 82.38°N, 21.00°WAcredale — 36.73°N, 76.34°WNorwich Crag — 52.58°N, 1.38°E

Loading coastlines…

The named rock units Retusa obtusa has been recovered from, largest first. Drawn where the rock is now, not where it formed. 7 occurrences have no formation on record, which is common for older literature.

Retusa obtusa and its relatives

Pleistocene

Where Retusa obtusa and its relatives were recorded in the Pleistocene.

Found in the same rock

51 taxa

The Paleobiology Database records 3 sites for Retusa obtusa, 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 11 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 Retusa obtusa

Credit
H. Zell
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

No 3D scan of Retusa obtusa 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 itRetusa through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. (Montagu 1808)