Semitreta

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

On record

Recorded, not inferred
Sits inside
AcrotretidaePBDB
Diet
suspension feederPBDB, for Acrotretida
Life habit
epifaunalPBDB, for Acrotretida
Motility
stationary, attachedPBDB, for Acrotretida
Vision
blindPBDB, for Lingulata
Environment
marinePBDB, for Lophophorata

Time the record covers

At least 7.7 million years on record.

The record covers at least 477.1 Mya to 469.4 Mya. No occurrence read is dated outside 486.85 Mya to 458.2 Mya.

Cambrian — about 0 of 9 occurrencesOrdovician — about 9 of 9 occurrencesOrdovician487–486 Mya — about 0.0 occurrences486–485 Mya — about 0.2 occurrences485–484 Mya — about 0.2 occurrences484–483 Mya — about 0.2 occurrences483–482 Mya — about 0.2 occurrences482–481 Mya — about 0.2 occurrences481–480 Mya — about 0.2 occurrences480–479 Mya — about 0.2 occurrences479–478 Mya — about 0.2 occurrences478–477 Mya — about 0.2 occurrences477–476 Mya — about 0.1 occurrences476–475 Mya — about 0.8 occurrences475–474 Mya — about 1 occurrence474–473 Mya — about 1.0 occurrences473–472 Mya — about 0.7 occurrences472–471 Mya — about 0.6 occurrences471–470 Mya — about 0.5 occurrences470–469 Mya — about 0.2 occurrences469–468 Mya — about 0.2 occurrences468–467 Mya — about 0.2 occurrences467–466 Mya — about 0.2 occurrences466–465 Mya — about 0.2 occurrences465–464 Mya — about 0.2 occurrences464–463 Mya — about 0.2 occurrences463–462 Mya — about 0.2 occurrences462–461 Mya — about 0.2 occurrences461–460 Mya — about 0.2 occurrences460–459 Mya — about 0.2 occurrences459–458 Mya — about 0.1 occurrences477.1 Mya469.4 Mya487.4 Mya457.6 Mya

9 occurrences of Semitreta 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

9 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

Valhallfonna — 79.85°N, 17.67°EWysoczki Chalcedonite — 50.67°N, 21.27°ETinu — 17.37°N, 97.17°WKirtonryggen — 79.85°N, 17.68°EEmanuel — 18.65°S, 125.92°E

Loading coastlines…

The named rock units Semitreta has been recovered from, largest first. Drawn where the rock is now, not where it formed.

Semitreta and its relatives

Ordovician

Where Semitreta and its relatives were recorded in the Ordovician.

Found in the same rock

44 taxa

The Paleobiology Database records 9 sites for Semitreta, 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

4 references

Each of the 9 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 Semitreta 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 Semitreta, or no answer at all. This entry cannot say which.

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

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

Keep going

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

Occurrence data from the Paleobiology Database, CC BY 4.0. Biernat 1973