Sigmoilopsis

Sigmoilinopsis is a genus of miliolid Foraminifera, with an ovate test, chambers one-half coil in length, arranged in rapidly changing planes in the early stage resulting in two spiralling series that appear sigmoid in section, gradually becoming planispiral in the adult. Walls are thick, porcelaneous but enclosing a large quantity of agglutinated quartz particles, sponge spicules, and shell fragments; the aperture terminal, rounded, with a small tooth.

No picture of Sigmoilopsis was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none. GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Sigmoilopsis, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
SigmoilopsinaePBDB
Diet
omnivorePBDB, for Foraminifera
Life habit
semi-infaunalPBDB, for Foraminifera
Motility
stationaryPBDB, for Foraminifera

Time the record covers

At least 18 million years on record.

The record covers at least 18.7 Mya to 11.7 ka. No occurrence read is dated outside 23.04 Mya to 0 Mya.

Oligocene — about 0 of 519 occurrencesMiocene — about 100 of 519 occurrencesMiocenePliocene — about 96 of 519 occurrencesPliocenePleistocene — about 320 of 519 occurrencesPleistocene24–23 Mya — about 0.8 occurrences23–22 Mya — about 2 occurrences22–21 Mya — about 2 occurrences21–20 Mya — about 3 occurrences20–20 Mya — about 3 occurrences20–19 Mya — about 3 occurrences19–18 Mya — about 3 occurrences18–17 Mya — about 3 occurrences17–16 Mya — about 3 occurrences16–16 Mya — about 3 occurrences16–15 Mya — about 3 occurrences15–14 Mya — about 3 occurrences14–13 Mya — about 3 occurrences13–13 Mya — about 3 occurrences13–12 Mya — about 3 occurrences12–11 Mya — about 3 occurrences11–10 Mya — about 4 occurrences10–9.4 Mya — about 6 occurrences9.4–8.6 Mya — about 6 occurrences8.6–7.8 Mya — about 8 occurrences7.8–7.1 Mya — about 10 occurrences7.1–6.3 Mya — about 10 occurrences6.3–5.5 Mya — about 11 occurrences5.5–4.7 Mya — about 19 occurrences4.7–3.9 Mya — about 22 occurrences3.9–3.1 Mya — about 33 occurrences3.1–2.4 Mya — about 42 occurrences2.4–1.6 Mya — about 69 occurrences1.6–785 ka Mya — about 74 occurrences785 ka–0 Mya — about 161 occurrences18.7 Mya11.7 ka23.5 Mya0 Mya

519 occurrences of Sigmoilopsis 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

519 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

Ihungia — 40.27°S, 176.30°ECayo Agua — 9.18°N, 82.05°WEscudo de Veraguas — 9.10°N, 81.57°WQuilon Limestone — 8.97°N, 76.63°E

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The named rock units Sigmoilopsis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 513 occurrences have no formation on record, which is common for older literature.

Sigmoilopsis and its relatives

Pleistocene

Where Sigmoilopsis and its relatives were recorded in the Pleistocene.

Found in the same rock

254 taxa

The Paleobiology Database records 506 sites for Sigmoilopsis, and this reads 240 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

48 references

Each of the 519 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. 36 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 content0

No picture of Sigmoilopsis was found. Wikipedia, Wikidata, iDigBio and Smithsonian Open Access were searched and had none.

GBIF was asked, and what came back is not recorded: nothing, or a picture this site could not tie to Sigmoilopsis, or no answer at all. This entry cannot say which.

No 3D scan was found. Smithsonian Open Access, MorphoSource and Sketchfab were all searched.

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 itSigmoilopsinae through timeFormations of the PleistoceneThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Reuss 1850