Sigmelasma

No picture of Sigmelasma 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 Sigmelasma, or no answer at all. This entry cannot say which.

On record

Recorded, not inferred
Sits inside
WangyuiidaePBDB
Diet
suspension feederPBDB, for Orthida
Life habit
epifaunalPBDB, for Orthida
Motility
stationary, attachedPBDB, for Orthida
Vision
blindPBDB, for Rhynchonellata
Environment
marinePBDB, for Lophophorata

Time the record covers

At least 13 million years on record.

The record covers at least 458.2 Mya to 445.2 Mya. No occurrence read is dated outside 471.3 Mya to 443.1 Mya.

Ordovician — about 42 of 42 occurrencesOrdovicianSilurian — about 0 of 42 occurrences472–471 Mya — about 0.0 occurrences471–470 Mya — about 0.0 occurrences470–469 Mya — about 0.0 occurrences469–468 Mya — about 0.0 occurrences468–467 Mya — about 0.0 occurrences467–466 Mya — about 0.0 occurrences466–465 Mya — about 0.0 occurrences465–464 Mya — about 0.0 occurrences464–463 Mya — about 0.0 occurrences463–462 Mya — about 0.0 occurrences462–461 Mya — about 0.0 occurrences461–460 Mya — about 7 occurrences460–459 Mya — about 7 occurrences459–458 Mya — about 7 occurrences458–457 Mya — about 0.3 occurrences457–456 Mya — about 0.3 occurrences456–455 Mya — about 0.3 occurrences455–454 Mya — about 0.3 occurrences454–453 Mya — about 0.3 occurrences453–452 Mya — about 0.3 occurrences452–451 Mya — about 0.3 occurrences451–450 Mya — about 0.3 occurrences450–449 Mya — about 0.5 occurrences449–448 Mya — about 2 occurrences448–447 Mya — about 2 occurrences447–446 Mya — about 2 occurrences446–445 Mya — about 2 occurrences445–444 Mya — about 4 occurrences444–444 Mya — about 5 occurrences444–443 Mya — about 2 occurrences458.2 Mya445.2 Mya471.9 Mya442.5 Mya

42 occurrences of Sigmelasma on record, most of them in the Ordovician. 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

42 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

5 formations

Kangaroo Creek — 41.37°N, 122.69°WKangaroo Creek — 41.39°N, 122.64°WHorseshoe Gulch — 41.42°N, 122.77°WÄrina — 59.18°N, 26.20°EGregg Ranch — 41.39°N, 122.67°WHorseshoe Gulch unit — 41.41°N, 122.76°W

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The named rock units Sigmelasma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 3 occurrences have no formation on record, which is common for older literature.

Sigmelasma and its relatives

Ordovician

Where Sigmelasma and its relatives were recorded in the Ordovician.

Found in the same rock

52 taxa

The Paleobiology Database records 42 sites for Sigmelasma, 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

2 references

Each of the 42 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 content0

No picture of Sigmelasma 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 Sigmelasma, or no answer at all. This entry cannot say which.

No 3D scan of Sigmelasma 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.

This is what the site found, which is not the same as what exists.

Keep going

What may have been alongside itWangyuiidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Potter 1990