Oniscidea
Woodlice are terrestrial isopods in the suborder Oniscidea. Their name is derived from being often found in old wood, and from louse, a parasitic insect, although woodlice are neither parasitic nor insects. Other common names include slater, sow bug, and wood pig, common names varying widely by region.

Collage: User:Edit-pi (collage), original authors: see source images. · 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
- IsopodaPBDB
- Diet
- omnivorePBDB, for Malacostraca
- Life habit
- epifaunalPBDB, for Malacostraca
- Motility
- actively mobilePBDB, for Malacostraca
- Vision
- well-developedPBDB, for Malacostraca
Time the record covers
At least 100 million years on record.
The record covers at least 100.5 Mya to 129 ka. No occurrence read is dated outside 106.3 Mya to 0 Mya.
38 occurrences of Oniscidea on record, most of them in the Miocene. 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
38 occurrences- Early Cretaceous16%
- Late Cretaceous8%
- Eocene18%
- Oligocene5%
- Miocene42%
- Pleistocene10%
- Holoceneunder 1%
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
7 formations
- Escucha Formation6
- La Quinta Formation4
- Chira Formation2
- Mancora Formation1
- Quilon Limestone Formation1
- Eger Formation1
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The named rock units Oniscidea has been recovered from, largest first. Drawn where the rock is now, not where it formed. 22 occurrences have no formation on record, which is common for older literature.
Oniscidea and its relatives
MioceneWhere Oniscidea and its relatives were recorded in the Miocene.
Found in the same rock
1,184 taxa- Araneae3 sites
- Ablator triguttatus2 sites
- Adorator hispidus2 sites
- Allacrotelsa dubia2 sites
- Anyphaena fuscata2 sites
- Archaea paradoxa2 sites
- Architectonica sullana2 sites
- Caddo dentipalpus2 sites
- Cataglyphoides constricta2 sites
- Clementia (Egesta) peruviana2 sites
- Clubiona microphthalma2 sites
- Clubiona pubescens2 sites
- Clubiona tomentosa2 sites
- Clya lugubris2 sites
- Clya obscura2 sites
- Cronicus anomalus2 sites
- Cryptoplanus sericatus2 sites
- Ctenobethylus goepperti2 sites
- Custodela oblonga2 sites
- Dicranopalpus ramiger2 sites
- Dolichoderus balticus2 sites
- Dolichoderus cornutus2 sites
- Dolichoderus tertiarius2 sites
- Electrohelicopsyche taeniata2 sites
The Paleobiology Database records 17 sites for Oniscidea, 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
18 references- Terrestrial isopods from Spanish amber (Crustacea: Oniscidea): insights into the Cretaceous soil biota6
- Diversity of the Crinocheta (Crustacea, Isopoda, Oniscidea) from Early Miocene Chiapas amber, Mexico6
- Two new species of the terrestrial isopod genus Pseudarmadillo from Dominican amber (Amber-Collection Stuttgart: Crustacea, Isopoda, Pseudarmadillidae)4
- Terrestrial arthropods from the late Pleistocene of Jamaica – systematics, palaeoecology and taphonomy3
- Contributions to the Tertiary Paleontology of Northern Peru: Part 4, The Peruvian Oligocene3
- Fossil evidence of extended brood care in new Miocene Peracarida (Crustacea) from Mexico2
- Die im Bernstein befindlichen Crustaceen, Myriapoden, Arachniden und Apteren der Vorwelt2
- Footnotes and taxonomic names, in Die im Bernstein befindlichen Crustaceen, Myriapoden, Arachniden und Apteren der Vorwelt2
- A new genus and species of terrestrial isopod (Isopoda: Oniscidea) found in Baltic amber1
- First fossil of Tylidae (Isopoda: Oniscidea) in Kachin amber, Myanmar, with a list of all Oniscidea fossil records1
- A new genus of terrestrial isopods (Crustacea: Oniscidea: Armadillidae) in Myanmar amber1
- A remarkably well-preserved terrestrial isopod (Peracarida: Isopoda: Armadillidiidae) from the upper Oligocene of Hungary, with remarks on the oniscidean taphonomy1
Each of the 38 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. 6 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 Oniscidea
- Source
- Wikipedia/Commons
- Credit
- Collage: User:Edit-pi (collage), original authors: see source images.
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Oniscidea 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, “Woodlouse”
- 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 itIsopoda through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Latreille 1802