Isochnus
Isochnus is a genus of beetles belonging to the family Curculionidae.
Mark Gurney · CC BY-SA 2.0 · 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
- RhamphinaPBDB
- Motility
- actively mobilePBDB, for Arthropoda
- Environment
- terrestrialPBDB, for Insecta
Time the record covers
At least 5.2 million years on record.
The record covers at least 5.333 Mya to 129 ka. No occurrence read is dated outside 11.63 Mya to 11.7 ka.
12 occurrences of Isochnus on record, most of them in the Pleistocene. The Paleobiology Database records this as a living group. 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
12 occurrences- Miocene17%
- Pleistocene83%
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
3 formations
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The named rock units Isochnus 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.
Isochnus and its relatives
PleistoceneWhere Isochnus and its relatives were recorded in the Pleistocene.
Found in the same rock
333 taxa- Pterostichus (Cryobius)10 sites
- Bembidion7 sites
- Cholevinus sibiricus7 sites
- Curtonotus alpinus7 sites
- Hypera ornata7 sites
- Lepyrus nordenskioldi7 sites
- Morychus viridis7 sites
- Agabus6 sites
- Aphodius6 sites
- Stephanocleonus eruditus6 sites
- Poecilus nearcticus5 sites
- Pterostichus5 sites
- Pterostichus tundrae5 sites
- Tachinus arcticus5 sites
- Troglocollops arcticus5 sites
- Chrysolina rufilabris4 sites
- Notiophilus aquaticus4 sites
- Phyllobius4 sites
- Phyllobius virideaeris4 sites
- Pterostichus sublaevis4 sites
- Simplocaria basalis4 sites
- Sitona borealis4 sites
- Stenus4 sites
- Tachinus4 sites
The Paleobiology Database records 11 sites for Isochnus, 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
3 references- Late Cenozoic insects of northern Eurasia10
- The paleoenvironment of the Olympia beds based on fossil beetles from Discovery Park, Seattle, Washington, U.S.A.1
- Palaeoentomology of the Kap København Formation, a Plio-Pleistocene sequence in Peary Land, North Greenland1
Each of the 12 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 doi.org. Relayed as the Paleobiology Database holds them, not checked against what they resolve to.
Media and terms
Media content1
Picture of Isochnus
- Source
- Wikipedia/Commons
- Credit
- Mark Gurney
- Licence
- CC BY-SA 2.0
- Commercial use
- the licence allows it
No 3D scan of Isochnus 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.
The description on this site
- Source
- Wikipedia, “Isochnus”
- 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 itRhamphina through timeFormations of the PleistoceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Thomson 1859