Hemithecella expansa

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

On record

Recorded, not inferred
Sits inside
HemithecellaPBDB

Time the record covers

At most 9.8 million years on record.

Every occurrence read is dated to somewhere between 486.85 Mya and 477.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Cambrian — about 0 of 7 occurrencesOrdovician — about 7 of 7 occurrencesOrdovician487–487 Mya — about 0.1 occurrences487–486 Mya — about 0.2 occurrences486–486 Mya — about 0.3 occurrences486–486 Mya — about 0.3 occurrences486–485 Mya — about 0.3 occurrences485–485 Mya — about 0.3 occurrences485–484 Mya — about 0.3 occurrences484–484 Mya — about 0.3 occurrences484–484 Mya — about 0.3 occurrences484–483 Mya — about 0.3 occurrences483–483 Mya — about 0.2 occurrences483–483 Mya — about 0.2 occurrences483–482 Mya — about 0.2 occurrences482–482 Mya — about 0.2 occurrences482–482 Mya — about 0.2 occurrences482–481 Mya — about 0.2 occurrences481–481 Mya — about 0.2 occurrences481–481 Mya — about 0.2 occurrences481–480 Mya — about 0.2 occurrences480–480 Mya — about 0.2 occurrences480–479 Mya — about 0.2 occurrences479–479 Mya — about 0.2 occurrences479–479 Mya — about 0.2 occurrences479–478 Mya — about 0.2 occurrences478–478 Mya — about 0.2 occurrences478–478 Mya — about 0.2 occurrences478–477 Mya — about 0.2 occurrences477–477 Mya — about 0.1 occurrences487.4 Mya476.6 Mya

7 occurrences of Hemithecella expansa 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

7 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

2 formations

Gasconade — 38.10°N, 91.13°WGasconade — 38.22°N, 91.07°WGasconade — 37.90°N, 91.17°WGasconade — 37.94°N, 90.78°WChepultepec — 36.73°N, 81.77°WChepultepec — 38.80°N, 78.55°W

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

Hemithecella expansa and its relatives

Ordovician

Where Hemithecella expansa and its relatives were recorded in the Ordovician.

Found in the same rock

42 taxa

The Paleobiology Database records 7 sites for Hemithecella expansa, 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

3 references

Each of the 7 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 Hemithecella expansa 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 Hemithecella expansa, 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 itHemithecella through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Butts 1941