Illaenus

Illaenus is a genus of trilobites from Russia and Morocco, from the middle Ordovician.

A picture published with the record for Illaenus.

Dwergenpaartje · CC BY-SA 3.0 · via Wikipedia/Commons. May be a photograph of a specimen, or an artist’s reconstruction — an interpretation of a skeleton, since colour and soft tissue are almost never preserved.

On record

Recorded, not inferred
Sits inside
IllaenidaePBDB
Diet
carnivorePBDB, for Corynexochida
Life habit
nektobenthicPBDB, for Corynexochida
Motility
actively mobilePBDB, for Corynexochida
Vision
well-developedPBDB
Environment
marinePBDB, for Trilobita

Time the record covers

At least 44 million years on record.

The record covers at least 477.1 Mya to 432.9 Mya. No occurrence read is dated outside 488.9 Mya to 422.7 Mya.

Cambrian — about 0 of 578 occurrencesOrdovician — about 572 of 578 occurrencesOrdovicianSilurian — about 6 of 578 occurrencesSilurian490–488 Mya — about 0.1 occurrences488–486 Mya — about 2 occurrences486–483 Mya — about 4 occurrences483–481 Mya — about 5 occurrences481–479 Mya — about 5 occurrences479–476 Mya — about 7 occurrences476–474 Mya — about 9 occurrences474–472 Mya — about 10 occurrences472–470 Mya — about 38 occurrences470–467 Mya — about 43 occurrences467–465 Mya — about 44 occurrences465–463 Mya — about 36 occurrences463–460 Mya — about 44 occurrences460–458 Mya — about 63 occurrences458–456 Mya — about 56 occurrences456–454 Mya — about 42 occurrences454–451 Mya — about 52 occurrences451–449 Mya — about 50 occurrences449–447 Mya — about 33 occurrences447–444 Mya — about 24 occurrences444–442 Mya — about 6 occurrences442–440 Mya — about 0.5 occurrences440–437 Mya — about 0.6 occurrences437–435 Mya — about 0.7 occurrences435–433 Mya — about 0.8 occurrences433–431 Mya — about 2 occurrences431–428 Mya — about 0.6 occurrences428–426 Mya — about 0.5 occurrences426–424 Mya — about 0.2 occurrences424–421 Mya — about 0.1 occurrences477.1 Mya432.9 Mya490 Mya421 Mya

578 occurrences of Illaenus 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

578 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

197 formations

Antelope Valley — 39.09°N, 116.85°WAntelope Valley — 36.88°N, 116.65°WAntelope Valley — 38.53°N, 116.40°WAntelope Valley — 37.34°N, 115.38°WAntelope Valley — 37.30°N, 115.80°WAntelope Valley — 39.20°N, 116.25°WAntelope Valley — 39.00°N, 116.62°WAntelope Valley — 36.42°N, 116.62°WAntelope Valley — 38.82°N, 116.50°WHolen — 57.23°N, 16.96°EHolen — 57.37°N, 17.08°EHolen — 57.32°N, 17.00°EHolen — 57.15°N, 16.92°EHolen — 57.03°N, 16.88°EHolen — 57.00°N, 16.82°EHolen — 57.17°N, 16.94°EHolen — 56.62°N, 16.56°ETable Point — 50.70°N, 57.41°WTable Point — 50.36°N, 57.54°WTable Point — 49.37°N, 57.72°WTable Cove — 50.36°N, 57.54°WTable Cove — 50.18°N, 57.62°WBoda Limestone — 61.17°N, 14.71°EBoda Limestone — 61.05°N, 15.20°EBoda Limestone — 61.15°N, 15.12°EBoda Limestone — 61.33°N, 14.55°EBalclatchie — 55.24°N, 4.78°WBalclatchie — 55.31°N, 4.80°WPortixeddu — 39.44°N, 8.41°EPortixeddu — 39.46°N, 8.44°EPortixeddu — 39.27°N, 8.47°EPortixeddu — 39.23°N, 8.50°EDomusnovas — 40.32°N, 8.65°EDomusnovas — 39.44°N, 8.42°EDomusnovas — 39.33°N, 8.67°EDomusnovas — 39.24°N, 8.49°EBaota — 33.00°N, 111.00°EBaota — 29.00°N, 109.00°EBaota — 32.00°N, 107.00°EBaota — 29.00°N, 110.00°EBaota — 32.00°N, 118.00°EBaota — 33.00°N, 106.00°EKandle — 59.42°N, 24.75°EOil Creek — 34.35°N, 97.04°WOil Creek — 34.38°N, 97.31°WOil Creek — 34.31°N, 96.91°WOil Creek — 34.36°N, 97.14°WShihtzupu — 27.76°N, 106.92°EShihtzupu — 27.72°N, 107.02°EDunleith — 42.00°N, 90.50°WMingan — 50.21°N, 63.45°WMingan — 50.21°N, 63.75°WMingan — 50.21°N, 63.90°WMingan — 50.21°N, 63.56°WBenbolt — 35.91°N, 84.09°WBenbolt — 37.10°N, 81.34°WBenbolt — 37.22°N, 81.36°WBenbolt — 37.23°N, 81.10°WBenbolt — 37.00°N, 81.00°WBenbolt — 37.23°N, 81.32°WBenbolt — 37.08°N, 81.71°WWitten Limestone — 37.11°N, 81.52°WWitten Limestone — 37.00°N, 81.00°WWitten Limestone — 37.02°N, 81.63°WWitten Limestone — 37.03°N, 81.79°WWitten Limestone — 37.10°N, 81.62°WMiaopo — 33.00°N, 111.00°EMiaopo — 31.00°N, 111.00°EMiaopo — 32.00°N, 118.00°ECatoche — 51.63°N, 55.90°WCatoche — 48.54°N, 58.74°WCatoche — 50.73°N, 57.25°WCatoche — 51.60°N, 55.84°WVolkhov — 59.97°N, 32.57°EYehli — 41.84°N, 126.81°EYehli — 41.53°N, 123.55°EYehli — 41.49°N, 118.08°EYehli — 40.99°N, 117.82°EKullsberg — 61.05°N, 15.20°EKullsberg — 60.97°N, 15.15°EKullsberg — 60.92°N, 15.10°EDawangou — 40.64°N, 79.50°EDawan — 33.00°N, 111.00°EDawan — 29.00°N, 110.00°EDawan — 30.00°N, 111.00°EDawan — 31.00°N, 111.00°EBad Cache Rapids — 69.33°N, 81.78°WBad Cache Rapids — 66.92°N, 83.92°WBad Cache Rapids — 68.34°N, 82.37°WBad Cache Rapids — 68.36°N, 82.00°WBad Cache Rapids — 68.38°N, 82.31°W

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The named rock units Illaenus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 173 further formations hold fewer occurrences each and are not listed. 45 occurrences have no formation on record, which is common for older literature.

Illaenus and its relatives

Ordovician

Where Illaenus and its relatives were recorded in the Ordovician.

Found in the same rock

1,626 taxa

The Paleobiology Database records 491 sites for Illaenus, and this reads 240 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

155 references

Each of the 578 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. 143 further references are not listed. 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 content2

Picture of Illaenus

Credit
Dwergenpaartje
Licence
CC BY-SA 3.0
Commercial use
the licence allows it

3D model

Source
Sketchfab
Licence
CC Attribution-NonCommercial-ShareAlike
Commercial use
the licence does not allow it

This entry was cached before the site began recording what Smithsonian Open Access and MorphoSource did, so a search that failed cannot be told from one that found nothing.

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 itIllaenidae through timeFormations of the OrdovicianThe world it lived on

Occurrence data from the Paleobiology Database, CC BY 4.0. Dalman 1827