Peronopsis
Peronopsis is a genus of trilobite restricted to the Middle Cambrian. Its remains have been found in Asia, Australia, Europe, and North America.

Parent Géry · 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
- PeronopsidaePBDB
- Diet
- suspension feederPBDB, for Agnostoidea
- Life habit
- nektonicPBDB, for Agnostoidea
- Motility
- actively mobilePBDB, for Agnostoidea
- Vision
- blindPBDB, for Peronopsidae
- Environment
- marinePBDB, for Agnostoidea
Time the record covers
At least 12 million years on record.
The record covers at least 509.7 Mya to 497 Mya. No occurrence read is dated outside 516.2 Mya to 486.85 Mya.
246 occurrences of Peronopsis 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
246 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
67 formations
- Aktas Formation22
- Wheeler Formation21
- Shallow Bay Formation · Cow Head Group20
- Zhumabai Formation13
- Jince Formation11
- Conasauga Formation10
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The named rock units Peronopsis has been recovered from, largest first. Drawn where the rock is now, not where it formed. 43 further formations hold fewer occurrences each and are not listed. 32 occurrences have no formation on record, which is common for older literature.
Peronopsis and its relatives
CambrianWhere Peronopsis and its relatives were recorded in the Cambrian.
Found in the same rock
698 taxa- Elrathia26 sites
- Pagetia22 sites
- Olenoides20 sites
- Bathyuriscus19 sites
- Triplagnostus gibbus19 sites
- Itagnostus interstrictus16 sites
- Lingulella15 sites
- Elrathina14 sites
- Hypagnostus parvifrons12 sites
- Ptychagnostus12 sites
- Baltagnostus11 sites
- Kootenia11 sites
- Modocia11 sites
- Ptychagnostus intermedius11 sites
- Zacanthoides gilberti11 sites
- Ptychoparella10 sites
- Dictyonina9 sites
- Hyolithes9 sites
- Paradoxides9 sites
- Zacanthoides9 sites
- Chancia8 sites
- Conocoryphe sulzeri8 sites
- Lobocephalina emmrichi8 sites
- Phalagnostus8 sites
The Paleobiology Database records 147 sites for Peronopsis, 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
84 references- Ergaliev and Ergaliev, 200853
- Mid-Cambrian trilobites from the lowest part of the Cow Head Group, western Newfoundland17
- Potential Global Standard Stratotype-section and Point (GSSP) for a Cambrian stage boundary defined by the first appearance of the trilobite Ptychagnostus atavus, Drum Mountains, Utah, USA15
- Some Middle Cambrian agnostoid trilobites from Western North America11
- Cambrian agnostids from the North China Platform9
- Taxonomy and biostratigraphic significance of some Middle Cambrian trilobites from the Conasauga Formation in western Georgia7
- Molluscs of the Holm Dal Formation (late Middle Cambrian), central North Greenland6
- Yang et al., 19935
- Agnostid fauna from the Middle Cambrian of Kashmir5
- Trilobites and biostratigraphy of the Kuonamka Formation, northern Siberian Platform (Olenek River)4
- Evenness, richness and the Cambrian-Paleozoic faunal transition in North America: an assemblage-level perspective4
- Physical Stratigraphy and Trilobite Biostratigraphy of the Carrara Formation (Lower and Middle Cambrian) in the Southern Great Basin4
Each of the 246 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. 72 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 content3
Picture of Peronopsis
- Source
- Wikipedia/Commons
- Credit
- Parent Géry
- Licence
- CC BY-SA 3.0
- Commercial use
- the licence allows it
Photogrammetry
- Source
- MorphoSource
- Licence
- not stated by the source
- Commercial use
- cannot be read from the licence given — check the record
- Specimen
- peronopsis interstrictus · MST:PALEO:MST-SP-8000
3D model
- Source
- Sketchfab
- 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.
The description on this site
- Source
- Wikipedia, “Peronopsis”
- 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 itPeronopsidae through timeFormations of the CambrianThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Corda 1847