Anisotoma
Anisotoma is a genus of round fungus beetles in the family Leiodidae. There are at least 20 described species in Anisotoma.

Udo Schmidt from Deutschland · 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
- AnisotominiPBDB
- Motility
- actively mobilePBDB, for Arthropoda
- Environment
- terrestrialPBDB, for Insecta
Time the record covers
At least 31 million years on record.
The record covers at least 33.9 Mya to 2.58 Mya. No occurrence read is dated outside 37.71 Mya to 1.8 Mya.
4 occurrences of Anisotoma on record. The Paleobiology Database records this as a living group, and the chart stops with its fossils rather than at the present. 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
4 occurrences- Eocene50%
- Pleistocene50%
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
2 formations
Loading coastlines…
The named rock units Anisotoma has been recovered from, largest first. Drawn where the rock is now, not where it formed. 1 occurrence has no formation on record, which is common for older literature.
Found in the same rock
416 taxa- Aleocharinae2 sites
- Carabidae2 sites
- Curculionidae2 sites
- Omaliinae2 sites
- Oxytelinae2 sites
- Abdera (Abdera) hoffeinsorum1 site
- Acidota quadrata1 site
- Acrometa eichmanni1 site
- Aegialia (Psammoporus) terminalis1 site
- Agabinae1 site
- Agabini1 site
- Agabus1 site
- Agabus (Acatodes) anthracinus1 site
- Agabus (Agabus) bifarius1 site
- Agabus (Agabus) clavicornis1 site
- Agabus (Gaurodytes) affinis1 site
- Agabus florissantensis1 site
- Agonum1 site
- Agonum (Europhilus) exaratum1 site
- Agrypnia pagetana1 site
- Agrypnia straminea1 site
- Aleocharopsis caseyi1 site
- Aleocharopsis secunda1 site
- Amara1 site
The Paleobiology Database records 3 sites for Anisotoma, 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- Palaeoentomology of the Kap København Formation, a Plio-Pleistocene sequence in Peary Land, North Greenland2
- New extinct Eocene Coleoptera in Baltic amber of Friedhelm Eichmann's collection (Germany)1
- Fossil Coleoptera from Florissant in the United States National Museum1
Each of the 4 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 content1
Picture of Anisotoma
- Source
- Wikipedia/Commons
- Credit
- Udo Schmidt from Deutschland
- Licence
- CC BY-SA 2.0
- Commercial use
- the licence allows it
No 3D scan of Anisotoma 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
- 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 itAnisotomini through timeThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Illiger 1798