Isalaux

Isalaux is a trilobite in the order Phacopida, that existed during the upper Ordovician in what is now the United States. It was described by Frederickson and Pollack in 1952, and the type species is Isalaux canonensis. The type locality was the Harding Formation in Colorado.

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

On record

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

Time the record covers

At least 1.4 million years on record.

The record covers at least 458.2 Mya to 456.8 Mya. No occurrence read is dated outside 461.1 Mya to 449.5 Mya.

Ordovician — about 7 of 7 occurrencesOrdovician461–461 Mya — about 0.5 occurrences461–460 Mya — about 0.6 occurrences460–460 Mya — about 0.6 occurrences460–460 Mya — about 0.6 occurrences460–459 Mya — about 0.6 occurrences459–459 Mya — about 0.6 occurrences459–458 Mya — about 0.6 occurrences458–458 Mya — about 0.1 occurrences458–457 Mya — about 0.1 occurrences457–457 Mya — about 0.1 occurrences457–457 Mya — about 0.2 occurrences457–456 Mya — about 0.2 occurrences456–456 Mya — about 0.2 occurrences456–455 Mya — about 0.2 occurrences455–455 Mya — about 0.2 occurrences455–454 Mya — about 0.2 occurrences454–454 Mya — about 0.2 occurrences454–454 Mya — about 0.1 occurrences454–453 Mya — about 0.1 occurrences453–453 Mya — about 0.1 occurrences453–452 Mya — about 0.1 occurrences452–452 Mya — about 0.1 occurrences452–452 Mya — about 0.1 occurrences452–451 Mya — about 0.1 occurrences451–451 Mya — about 0.1 occurrences451–450 Mya — about 0.1 occurrences450–450 Mya — about 0.1 occurrences450–449 Mya — about 0.1 occurrences458.2 Mya – 456.8 Mya461.6 Mya449 Mya

7 occurrences of Isalaux 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

5 formations

Harding — 38.00°N, 105.00°WZagornyi — 68.00°N, 88.00°EZagornyi — 62.00°N, 90.00°EChertovskaya — 57.00°N, 106.00°EAmarkan — 68.00°N, 88.00°EMangazea — 62.14°N, 91.56°E

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

Isalaux and its relatives

Ordovician

Where Isalaux and its relatives were recorded in the Ordovician.

Found in the same rock

68 taxa

The Paleobiology Database records 7 sites for Isalaux, 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

6 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 Isalaux 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 Isalaux, or no answer at all. This entry cannot say which.

No 3D scan of Isalaux was found in MorphoSource and Sketchfab.

Smithsonian Open Access was 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 itPterygometopinae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Frederickson and Pollack 1952