Ibexaspis

Ibexaspis is a genus of trilobites in the order Phacopida, that existed during the lower Ordovician in what is now the United States. It was described by Pribyl and Vanek in 1985, and the type species is Ibexaspis quattuor, which was originally described under the genus Protopliomerops as the subspecies P. quattuor brevis by Young in 1973. The type locality was the Fillmore Formation in Utah.

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

On record

Recorded, not inferred
Sits inside
PliomeridaePBDB
Diet
carnivorePBDB, for Trilobita
Life habit
low-level epifaunalPBDB, for Trilobita
Motility
fast-movingPBDB, for Trilobita
Vision
well-developedPBDB, for Pliomeridae
Environment
marinePBDB, for Trilobita

Time the record covers

At most 11 million years on record.

Every occurrence read is dated to somewhere between 481.7 Mya and 471.3 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.

Ordovician — about 3 of 3 occurrencesOrdovician482–481 Mya — about 0.0 occurrences481–481 Mya — about 0.1 occurrences481–481 Mya — about 0.1 occurrences481–480 Mya — about 0.1 occurrences480–480 Mya — about 0.1 occurrences480–480 Mya — about 0.1 occurrences480–479 Mya — about 0.1 occurrences479–479 Mya — about 0.1 occurrences479–478 Mya — about 0.1 occurrences478–478 Mya — about 0.1 occurrences478–478 Mya — about 0.1 occurrences478–477 Mya — about 0.1 occurrences477–477 Mya — about 0.1 occurrences477–477 Mya — about 0.1 occurrences477–476 Mya — about 0.1 occurrences476–476 Mya — about 0.1 occurrences476–475 Mya — about 0.1 occurrences475–475 Mya — about 0.2 occurrences475–475 Mya — about 0.2 occurrences475–474 Mya — about 0.2 occurrences474–474 Mya — about 0.2 occurrences474–473 Mya — about 0.2 occurrences473–473 Mya — about 0.2 occurrences473–473 Mya — about 0.2 occurrences473–472 Mya — about 0.2 occurrences472–472 Mya — about 0.2 occurrences472–472 Mya — about 0.2 occurrences472–471 Mya — about 0.1 occurrences482.2 Mya470.8 Mya

3 occurrences of Ibexaspis 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

3 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

Fillmore Limestone — 38.84°N, 113.46°WFillmore Limestone — 38.82°N, 113.44°WFillmore — 39.84°N, 113.46°W

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

Ibexaspis and its relatives

Ordovician

Where Ibexaspis and its relatives were recorded in the Ordovician.

Found in the same rock

48 taxa

The Paleobiology Database records 3 sites for Ibexaspis, 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 3 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 Ibexaspis 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 Ibexaspis, or no answer at all. This entry cannot say which.

No 3D scan of Ibexaspis 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 itPliomeridae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Pribyl and Vanek 1985