Olenellus
Olenellus is an extinct genus of redlichiid trilobites, with species of average size. It lived during the Botomian and Toyonian stages of the Lower Cambrian (Olenellus-zone), 522 to 510 million years ago, in what is currently North America, part of the palaeocontinent Laurentia.

Jonathan Chen · CC BY-SA 4.0 · 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
- OlenellinaePBDB
- Diet
- deposit feederPBDB, for Redlichiida
- Life habit
- low-level epifaunalPBDB, for Redlichiida
- Motility
- fast-movingPBDB, for Redlichiida
- Vision
- well-developedPBDB, for Olenellidae
- Environment
- marinePBDB, for Trilobita
Time the record covers
At least 19 million years on record.
The record covers at least 516 Mya to 497 Mya. No occurrence read is dated outside 538.8 Mya to 486.85 Mya.
353 occurrences of Olenellus on record, most of them in the Cambrian. 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
353 occurrences- Cambrian100%
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
35 formations
- Carrara Formation97
- Kinzers Formation44
- Pioche Formation40
- Pioche Shale Formation29
- Sekwi Formation25
- Forteau Formation · Labrador Group23
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The named rock units Olenellus has been recovered from, largest first. Drawn where the rock is now, not where it formed. 11 further formations hold fewer occurrences each and are not listed. 1 occurrence has no formation on record, which is common for older literature.
Olenellus and its relatives
CambrianWhere Olenellus and its relatives were recorded in the Cambrian.
Found in the same rock
302 taxa- Paedeumias transitans18 sites
- Bonnia15 sites
- Mesonacis fremonti13 sites
- Wanneria11 sites
- Hyolithes10 sites
- Bolbolenellus brevispinus9 sites
- Bristolia9 sites
- Paterina9 sites
- Trilobita9 sites
- Nephrolenellus geniculatus8 sites
- Wanneria walcottana8 sites
- Bonnia parvula7 sites
- Kootenia7 sites
- Mesonacis7 sites
- Peachella iddingsi7 sites
- Salterella7 sites
- Antagmus6 sites
- Bristolia bristolensis6 sites
- Ptychoparella6 sites
- Brachiopoda5 sites
- Bristolia anteros5 sites
- Bristolia mohavensis5 sites
- Esmeraldina macer5 sites
- Nevadotheca whitei5 sites
The Paleobiology Database records 164 sites for Olenellus, 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
58 references- Biostratigraphy of upper Dyeran strata of the Carrara Formation, Emigrant Pass, Nopah Range, California59
- Physical Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the Southern Great Basin39
- Lower Cambrian Olenellus zone of the Appalachians39
- Microstratigraphy, trilobite biostratinomy, and depositional environment of the “Lower Cambrian” Ruin Wash Lagerstätte, Pioche Formation, Nevada31
- Lower Cambrian trilobites from the Sekwi Formation type section, northwestern Canada20
- The Lower Cambrian Forteau Formation, southern Labrador and Great Northern Peninsula, western Newfoundland: Lithostratigraphy, trilobites, and depositional setting19
- Ontogeny and evolution of the Early Cambrian trilobite genus Nephrolenellus (Olenelloidea)11
- Geology of the Hanover-York District Pennsylvania9
- Lower Cambrian Trilobites from the Illtyd Formation, Wernecke Mountains, Yukon Territory8
- Terminal Early Cambrian extinction of the Olenellina: documentation from the Pioche Formation, Nevada7
- Geologic map of the Rhyolite Ridge quadrangle, Esmeralda County, Nevada7
- Notes on the Cambrian rocks of the eastern Mohave Desert, California7
Each of the 353 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. 46 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 Olenellus
- Source
- Wikipedia/Commons
- Credit
- Jonathan Chen
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
3D model
- Source
- Sketchfab
- Credit
- consuella2293
- Licence
- CC Attribution
- Commercial use
- cannot be read from the licence given — check the record
The description on this site
- Source
- Wikipedia, “Olenellus”
- 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 itOlenellinae through timeFormations of the CambrianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. (Hall 1861)