Ectillaenus
Searched as Ectillaenus holubi. The Paleobiology Database treats Ectillaenus as the accepted name.
Ectillaenus is a genus of trilobites in the order Corynexochida.

Hectonichus · 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
- Environment
- marinePBDB, for Trilobita
Time the record covers
At most 11 million years on record.
Every occurrence read is dated to somewhere between 463.3 Mya and 452.8 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
2 occurrences of Ectillaenus 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
2 occurrences- Ordovician100%
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
1 formation
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The named rock units Ectillaenus has been recovered from, largest first. Drawn where the rock is now, not where it formed.
Ectillaenus and its relatives
OrdovicianWhere Ectillaenus and its relatives were recorded in the Ordovician.
Found in the same rock
489 taxa- Neseuretus19 sites
- Nobiliasaphus19 sites
- Placoparia17 sites
- Colpocoryphe16 sites
- Selenopeltis15 sites
- Salterocoryphe13 sites
- Didymograptus11 sites
- Mucronaspis11 sites
- Ormathops11 sites
- Uralichas11 sites
- Dionide10 sites
- Neseuretus tristani10 sites
- Prionocheilus10 sites
- Redonia10 sites
- Zeliszkella10 sites
- Glyptarca9 sites
- Stapeleyella inconstans9 sites
- Calix8 sites
- Heterorthina8 sites
- Pricyclopyge8 sites
- Barrandia homfrayi7 sites
- Isabelinia7 sites
- Asaphellus6 sites
- Degamella6 sites
The Paleobiology Database records 55 sites for Ectillaenus, 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
1 referenceEach of the 2 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 content2
Picture of Ectillaenus
- Source
- Wikipedia/Commons
- Credit
- Hectonichus
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
MorphoSource was not reached for this taxon, so this list is what the others held rather than everything there is.
The description on this site
- Source
- Wikipedia, “Ectillaenus”
- 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. Salter 1867