Nileidae
Nileidae is a family of trilobites of the Asaphida order.

Amir Ali Iranshahi 3 · CC0 · 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
- CyclopygoideaPBDB
- Diet
- carnivorePBDB, for Trilobita
- Life habit
- low-level epifaunalPBDB, for Asaphida
- Motility
- fast-movingPBDB, for Asaphida
- Vision
- well-developedPBDB
- Environment
- marinePBDB, for Trilobita
Time the record covers
At least 37 million years on record.
The record covers at least 486.85 Mya to 449.5 Mya. No occurrence read is dated outside 497 Mya to 443.1 Mya.
582 occurrences of Nileidae 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
582 occurrences- Cambrian4%
- Ordovician96%
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
149 formations
- Antelope Valley Formation · Pogonip Group36
- Table Cove Formation · Table Head Group36
- Valhallfonna Formation17
- Komstad Formation17
- Saergan Formation16
- Llanfallteg Formation15
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The named rock units Nileidae has been recovered from, largest first. Drawn where the rock is now, not where it formed. 125 further formations hold fewer occurrences each and are not listed. 85 occurrences have no formation on record, which is common for older literature.
Nileidae and its relatives
OrdovicianWhere Nileidae and its relatives were recorded in the Ordovician.
Found in the same rock
1,335 taxa- Nileus96 sites
- Illaenus49 sites
- Symphysurus49 sites
- Geragnostus43 sites
- Ampyx37 sites
- Remopleurides34 sites
- Shumardia33 sites
- Cyclopyge27 sites
- Didymograptus27 sites
- Trinodus25 sites
- Euloma23 sites
- Barrandia homfrayi20 sites
- Asaphellus19 sites
- Barrandia19 sites
- Carolinites19 sites
- Telephina19 sites
- Lonchodomas18 sites
- Niobe18 sites
- Ovalocephalus18 sites
- Dionide16 sites
- Glyptograptus16 sites
- Michelinoceras16 sites
- Nileus affinis16 sites
- Megalaspides15 sites
The Paleobiology Database records 461 sites for Nileidae, 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
141 references- Ordovician (Darriwilian-early Katian) trilobite faunas of northwestern Tarim, Xinjiang, China29
- On the Early Ordovician of Sweden stratigraphy and fauna28
- Trilobites of the Ordovician Table Head Formation, western Newfoundland27
- Description of the upper portion of the drill-core from Finngrundet in the South Bothnian Bay25
- Ordovician (Llanvirn) Trilobites from SW Wales21
- Early Ordovician (Arenig) trilobite palaeoecology and palaeobiogeography of the South China Plate17
- Trilobite systematies, biostratigraphy and palaeoecology of the Lower Ordovician Komstad Limestone and Huk Forrnations, southern Scandinavia17
- Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada16
- Upper Arenig trilobite biostratigraphy and sea-level changes at Lynna River near Volkhov, Russia14
- The Ordovician trilobites of Spitsbergen. III. Remaining trilobites of the Valhallfonna Formation14
- Middle Ordovician Table Head Formation, western Newfoundland14
- Stratigraphic Summary of the Southwestern Region of China11
Each of the 582 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. 129 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 content1
Picture of Nileidae
- Source
- Wikipedia/Commons
- Credit
- Amir Ali Iranshahi 3
- Licence
- CC0
- Commercial use
- the licence allows it
No 3D scan of Nileidae 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
- Source
- Wikipedia, “Nileidae”
- 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 itCyclopygoidea through timeFormations of the OrdovicianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Angelin 1854