Nileus exarmatus
No picture of Nileus exarmatus 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 Nileus exarmatus, or no answer at all. This entry cannot say which.
On record
Recorded, not inferred- Sits inside
- NileusPBDB
- 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 least 7.7 million years on record.
The record covers at least 477.1 Mya to 469.4 Mya. No occurrence read is dated outside 486.85 Mya to 458.2 Mya.
15 occurrences of Nileus exarmatus 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
15 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
5 formations
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The named rock units Nileus exarmatus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 8 occurrences have no formation on record, which is common for older literature.
Nileus exarmatus and its relatives
OrdovicianWhere Nileus exarmatus and its relatives were recorded in the Ordovician.
Found in the same rock
65 taxa- Symphysurus4 sites
- Geragnostus3 sites
- Megalaspides3 sites
- Niobe (Niobella) imparilimbata3 sites
- Raymondaspis3 sites
- Ampyx2 sites
- Asaphellus2 sites
- Cyclopyge2 sites
- Cyrtometopus2 sites
- Endoceras2 sites
- Illaenus2 sites
- Megistaspis (Megistaspis) limbata2 sites
- Megistaspis (Megistaspis) polyphemus2 sites
- Neseuretinus birmanicus2 sites
- Nileus orbiculatoides2 sites
- Pseudocalymene2 sites
- Ptychopyge2 sites
- Remopleuridiella2 sites
- Rhombampyx glaber2 sites
- Agerina1 site
- Agerina erratica1 site
- Amorphognathus1 site
- Ancyginaspis priscus1 site
- Anisonotus obtusus1 site
The Paleobiology Database records 15 sites for Nileus exarmatus, 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
4 references- Description of the upper portion of the drill-core from Finngrundet in the South Bothnian Bay8
- Ordovician Trilobites from Iran4
- Trilobite systematies, biostratigraphy and palaeoecology of the Lower Ordovician Komstad Limestone and Huk Forrnations, southern Scandinavia2
- On the Early Ordovician of Sweden stratigraphy and fauna1
Each of the 15 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 Nileus exarmatus 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 Nileus exarmatus, or no answer at all. This entry cannot say which.
No 3D scan of Nileus exarmatus 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.
This is what the site found, which is not the same as what exists.
Keep going
What may have been alongside itNileus through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Tjernvik 1956