Polydesmida
Polydesmida is the largest order of millipedes, with more than 5,000 species, including all the millipedes reported to produce hydrogen cyanide (HCN). This order is also the most diverse of the millipede orders in terms of morphology. Millipedes in this order are found in all regions of the world other than Antarctica.
Bob Walker (uploaded by en:User:Paphrag ) · 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
- MerochetaPBDB
- Motility
- actively mobilePBDB, for Arthropoda
Time the record covers
At least 93 million years on record.
The record covers at least 93.9 Mya to 129 ka. No occurrence read is dated outside 100.5 Mya to 11.7 ka.
30 occurrences of Polydesmida 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
30 occurrences- Late Cretaceous20%
- Miocene70%
- Pleistocene10%
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.
Polydesmida and its relatives
MioceneWhere Polydesmida and its relatives were recorded in the Miocene.
Found in the same rock
1,794 taxa- Salticinae5 sites
- Andrognathus burmiticus3 sites
- Geophilomorpha3 sites
- Heterochordeumatidae3 sites
- Marpissina3 sites
- Phryssonotus burmiticus3 sites
- Polyzoniida3 sites
- Scolopendromorpha3 sites
- Siphonophora3 sites
- Siphonophoridae3 sites
- Stemmiulidae3 sites
- Apocephalus succineus2 sites
- Araneae2 sites
- Burmadictyna excavata2 sites
- Burmathele2 sites
- Burmesarchaea bilongapophyses2 sites
- Burmesarchaea pseudogibber2 sites
- Burmorsolus2 sites
- Cambalidea2 sites
- Caulophilus ashei2 sites
- Caulophilus falini2 sites
- Caulophilus swensoni2 sites
- Chalcosicya2 sites
- Cossonus hinojosai2 sites
The Paleobiology Database records 17 sites for Polydesmida, 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
9 references- The millipedes and centipedes of Chiapas amber9
- Millipeds from Dominican amber, with the description of two new species (Diplopoda: Siphonophoridae) of Siphonophora9
- Checklist of the Myriapoda in Cretaceous Burmese amber and a correction of the Myriapoda identified by Zhang (2017)4
- Two flat-backed polydesmidan millipedes from the Miocene Chiapas-amber Lagerstätte, Mexico2
- Unusual preservation of late Quaternary millipedes from Jamaica2
- A new species of Polydesmidae (Myriapoda, Diplopoda, Polydesmida) from the mid-Cretaceous Burmese amber1
- A new species of Trichopolydesmidae (Myriapoda, Diplopoda, Polydesmida) from the mid-Cretaceous Burmese amber1
- Terrestrial arthropods from the late Pleistocene of Jamaica – systematics, palaeoecology and taphonomy1
- Two fossil millipeds from the Dominican amber (Diplopoda: Chytodesmidae, Siphonophoridae)1
Each of the 30 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 Polydesmida
- Source
- Wikipedia/Commons
- Credit
- Bob Walker (uploaded by en:User:Paphrag )
- Licence
- CC BY-SA 4.0
- Commercial use
- the licence allows it
No 3D scan of Polydesmida 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, “Polydesmida”
- 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 itMerocheta through timeFormations of the MioceneThe world it lived on
Occurrence data from the Paleobiology Database, CC BY 4.0. Pocock 1887