Nileus
Searched as Nileus glazialis glazialis. The Paleobiology Database treats Nileus as the accepted name.

Ghedoghedo · CC BY-SA 3.0 · via Wikidata/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
- NileidaePBDB
- Diet
- carnivorePBDB, for Trilobita
- Life habit
- low-level epifaunalPBDB, for Asaphida
- Motility
- fast-movingPBDB, for Asaphida
- Vision
- well-developedPBDB, for Nileidae
- Environment
- marinePBDB, for Trilobita
Time the record covers
At most 3 million years on record.
Every occurrence read is dated to somewhere between 472.1 Mya and 469.1 Mya, and nothing in the dating separates them, so that window is what the record shows rather than a span.
8 occurrences of Nileus 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
8 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.
Nileus and its relatives
OrdovicianWhere Nileus and its relatives were recorded in the Ordovician.
Found in the same rock
1,153 taxa- Illaenus62 sites
- Remopleurides51 sites
- Ampyx39 sites
- Geragnostus34 sites
- Cyclopyge27 sites
- Trinodus27 sites
- Ovalocephalus26 sites
- Lonchodomas25 sites
- Telephina22 sites
- Niobe18 sites
- Carolinites17 sites
- Raymondaspis17 sites
- Agerina16 sites
- Michelinoceras16 sites
- Symphysurus16 sites
- Cyrtometopus15 sites
- Dionide15 sites
- Shumardia15 sites
- Birmanites14 sites
- Euprimites14 sites
- Illaenidae14 sites
- Metagnostidae14 sites
- Orthidiella14 sites
- Antigonambonites planus13 sites
The Paleobiology Database records 267 sites for Nileus, 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
1 referenceEach of the 8 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 Nileus
- Source
- Wikidata/Commons
- Credit
- Ghedoghedo
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Credit
- Adrian Gyllingberg
- Licence
- CC Attribution-NonCommercial-ShareAlike
- Commercial use
- the licence does not allow it
Smithsonian Open Access was 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 itNileidae through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Dalman 1827)