Circothecidae

Circothecidae are a family of Cambrian problematica, sometimes attributed to the Hyolitha, though some authors suggest that they are definitely not.

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

On record

Recorded, not inferred
Sits inside
OrthothecidaPBDB
Diet
suspension feederPBDB, for Hyolitha
Life habit
epifaunalPBDB, for Hyolitha
Motility
stationaryPBDB, for Hyolitha
Vision
blindPBDB, for Hyolitha
Environment
marinePBDB, for Hyolitha

Time the record covers

At least 89 million years on record.

The record covers at least 538.8 Mya to 449.5 Mya. No occurrence read is dated outside 635 Mya to 445.2 Mya.

Cambrian — about 384 of 388 occurrencesCambrianOrdovician — about 2 of 388 occurrencesOrdovicianSilurian — about 0 of 388 occurrences639–632 Mya — about 0.1 occurrences632–626 Mya — about 0.1 occurrences626–619 Mya — about 0.1 occurrences619–612 Mya — about 0.1 occurrences612–606 Mya — about 0.1 occurrences606–599 Mya — about 0.1 occurrences599–593 Mya — about 0.1 occurrences593–586 Mya — about 0.1 occurrences586–580 Mya — about 0.1 occurrences580–573 Mya — about 0.1 occurrences573–566 Mya — about 0.1 occurrences566–560 Mya — about 0.1 occurrences560–553 Mya — about 0.1 occurrences553–547 Mya — about 0.1 occurrences547–540 Mya — about 0.1 occurrences540–534 Mya — about 22 occurrences534–527 Mya — about 83 occurrences527–520 Mya — about 171 occurrences520–514 Mya — about 50 occurrences514–507 Mya — about 32 occurrences507–501 Mya — about 17 occurrences501–494 Mya — about 9 occurrences455–448 Mya — about 0.8 occurrences448–441 Mya — about 1 occurrence538.8 Mya449.5 Mya639 Mya441 Mya

388 occurrences of Circothecidae on record, most of them in the Cambrian. 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

388 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

59 formations

Dengying — 30.77°N, 111.32°EDengying — 32.98°N, 106.27°EDengying — 32.50°N, 107.00°EDengying — 33.00°N, 107.92°EDengying — 25.48°N, 103.03°EDengying — 24.55°N, 102.72°EDengying — 26.63°N, 105.85°EDengying — 28.27°N, 106.30°EDengying — 32.35°N, 106.82°EDengying — 30.73°N, 111.13°EDengying — 30.77°N, 111.12°EDengying — 25.52°N, 103.07°EDengying — 33.67°N, 109.46°EYanjiahe — 30.73°N, 111.08°EYanjiahe — 30.73°N, 111.03°EYanjiahe — 30.78°N, 111.35°EZhujiaqing — 27.93°N, 103.56°EZhujiaqing — 24.67°N, 102.65°EZhujiaqing — 24.55°N, 102.72°EZhujiaqing — 26.28°N, 103.22°EZhujiaqing — 24.73°N, 102.57°EZhujiaqing — 25.52°N, 103.07°EZhujiaqing — 26.38°N, 103.21°ETindall Limestone — 13.88°S, 131.15°ETindall Limestone — 13.82°S, 131.35°ETindall Limestone — 14.25°S, 131.38°ETindall Limestone — 14.42°S, 132.25°ETindall Limestone — 13.42°S, 130.58°ETindall Limestone — 13.75°S, 131.28°ETindall Limestone — 14.33°S, 132.17°ETindall Limestone — 13.60°S, 131.20°EKuanchuanpu — 33.00°N, 106.17°EKuanchuanpu — 32.50°N, 106.92°EKuanchuanpu — 32.94°N, 107.70°EKuanchuanpu — 32.97°N, 106.25°EHuangshandong — 30.83°N, 111.17°EHuangshandong — 30.77°N, 111.13°EPestrotsvet — 57.35°N, 131.20°EPestrotsvet — 57.17°N, 132.00°EPestrotsvet — 58.75°N, 128.00°EPestrotsvet — 58.75°N, 127.00°EPestrotsvet — 60.82°N, 125.32°EPestrotsvet — 71.83°N, 107.00°EPestrotsvet — 71.50°N, 105.00°EPestrotsvet — 57.40°N, 132.73°EPestrotsvet — 61.29°N, 135.50°EBastion — 74.10°N, 23.00°WBastion — 73.52°N, 24.68°WBastion — 72.85°N, 25.03°WBastion — 74.35°N, 22.77°WEmyaksin — 62.00°N, 129.67°EEmyaksin — 70.72°N, 112.88°EEmyaksin — 70.22°N, 113.70°EEmyaksin — 70.71°N, 112.79°EParara — 34.70°S, 137.71°EParara — 34.73°S, 137.63°EParara — 34.80°S, 137.69°EChulaktau — 43.47°N, 69.87°EChulaktau — 43.62°N, 69.73°EChulaktau — 43.37°N, 70.22°EChulaktau — 43.60°N, 69.33°EChulaktau — 43.47°N, 69.97°EChulaktau — 43.60°N, 69.45°EFosters Point — 45.77°N, 60.29°WTyuser — 62.00°N, 129.67°ETyuser — 71.07°N, 127.43°ETyuser — 71.03°N, 127.48°EBrowns Pond — 42.22°N, 73.73°WZhujianqing — 24.73°N, 102.57°ETal — 30.07°N, 78.48°ETal — 30.35°N, 78.17°ETal — 30.45°N, 78.08°EMaidiping — 29.53°N, 103.39°EKulpara — 34.92°S, 137.80°EKulpara — 34.70°S, 137.71°EKulpara — 34.73°S, 137.63°EMedvezhin — 70.50°N, 103.40°EMedvezhin — 70.67°N, 103.00°ESoltanieh — 35.67°N, 51.42°EWeymouth — 41.95°N, 71.28°WWeymouth — 42.22°N, 70.95°WLower Comley — 52.65°N, 2.73°WLower Comley — 52.56°N, 2.76°WUpper Krol Phosphorite — 30.50°N, 78.17°ESellick Hill — 35.37°S, 138.38°E

Loading coastlines…

The named rock units Circothecidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 35 further formations hold fewer occurrences each and are not listed. 1 occurrence has no formation on record, which is common for older literature.

Circothecidae and its relatives

Cambrian

Where Circothecidae and its relatives were recorded in the Cambrian.

Found in the same rock

762 taxa

The Paleobiology Database records 262 sites for Circothecidae, 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

70 references

Each of the 388 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. 58 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 Circothecidae was found. Wikipedia, Wikidata and iDigBio were searched and had none.

Smithsonian Open Access did not answer, so this is what the others held rather than everything there is.

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

No 3D scan of Circothecidae 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 itOrthothecida through timeFormations of the CambrianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Rozanov et al. 1969