Hillyardina semicylindrica

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

On record

Recorded, not inferred
Sits inside
HillyardinaPBDB
Diet
deposit feederPBDB, for Proetida
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Hystricuridae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 1.7 million years on record.

Every occurrence read is dated to somewhere between 483.4 Mya and 481.7 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Ordovician — about 5 of 5 occurrencesOrdovician483–483 Mya — about 0.1 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–483 Mya — about 0.3 occurrences483–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.3 occurrences482–482 Mya — about 0.1 occurrences483.9 Mya481.2 Mya

5 occurrences of Hillyardina semicylindrica 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

5 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

Garden City — 42.11°N, 111.64°WFillmore Limestone — 38.82°N, 113.44°W

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

Hillyardina semicylindrica and its relatives

Ordovician

Where Hillyardina semicylindrica and its relatives were recorded in the Ordovician.

Found in the same rock

27 taxa

The Paleobiology Database records 5 sites for Hillyardina semicylindrica, 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 5 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. Each entry links to the Paleobiology Database's own record for the work.

Media and terms

Media content0

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

No 3D scan of Hillyardina semicylindrica 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 itHillyardina through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Ross 1951