| Crossosoma | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Myriapoda |
| Class: | Diplopoda |
| Order: | Chordeumatida |
| Family: | Craspedosomatidae |
| Genus: | Crossosoma Ribaut 1913 |
Crossosoma is a genus of millipedes in the family Craspedosomatidae. There are about 10 described species in Crossosoma. [1] [2]
Millipedes are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derived from this feature. Each double-legged segment is a result of two single segments fused together. Most millipedes have very elongated cylindrical or flattened bodies with more than 20 segments, while pill millipedes are shorter and can roll into a tight ball. Although the name "millipede" derives from Latin for "thousand feet", no species was known to have 1,000 or more until the discovery in 2020 of Eumillipes persephone, which can have over 1,300 legs. There are approximately 12,000 named species classified into 16 orders and around 140 families, making Diplopoda the largest class of myriapods, an arthropod group which also includes centipedes and other multi-legged creatures.
Heptium is a genus of crested millipedes in the family Schizopetalidae. There are at least two described species in Heptium.
Siphoniulus is a poorly known genus of millipede containing only two living species: S. alba from Indonesia, and S. neotropicus from Mexico and Guatemala. An additional two fossil species are known from Cretaceous amber. Siphoniulus species are the only members of the family Siphoniulidae and order Siphoniulida, making Siphoniulida the smallest millipede order. Few specimens are known, and their classification is contentious, although most recent studies place them as basal members of the Helminthomorpha.
Casimir Albrecht Willem Jeekel (1922–2010) was a Dutch myriapodologist and entomologist known for his major contributions to the taxonomy of millipedes. His 1971 monograph Nomenclator Generum et Familiarum Diplopodorum is credited as launching the "modern era" of millipede taxonomy, and has been considered the "most important single work ever published on the Diplopoda". He served as director of the Zoological Museum Amsterdam, and authored over 150 works on the taxonomy of millipedes and other myriapods.
Polyzoniidae is a family of millipedes in the order Polyzoniida. There are about 9 genera and at least 60 described species in Polyzoniidae.
Cambalidae is a family of millipedes in the order Spirostreptida. There are at least 20 genera and 80 described species in Cambalidae.
Anthroleucosomatidae is a family of millipedes in the order Chordeumatida. This family includes more than 100 species distributed among 40 genera. This family has a mostly Holarctic distribution, with the greatest diversity in the area around the Mediterranean sea.
Caseyidae is a family of millipedes in the order Chordeumatida. Adult millipedes in this family have 30 segments. There are about 7 genera and at least 40 described species in Caseyidae.
Conotylidae is a family of millipedes in the order Chordeumatida. Adult millipedes in this family have 30 segments. There are about 19 genera and at least 60 described species in Conotylidae.
Craspedosomatidae is a family of millipedes in the order Chordeumatida. Most adult millipedes in this family have 30 segments, but some have only 28. There are at least 30 genera and 210 described species in Craspedosomatidae.
Rhiscosomides is a genus of millipedes in the order Chordeumatida with seven described species, and is the only genus in the family Rhiscosomididae. Adult millipedes in this family have 30 segments.
Trichopetalidae is a family of millipedes in the order Chordeumatida. Adult millipedes in this family have 28 or 30 segments. There are about 5 genera and at least 30 described species in Trichopetalidae.
Nearctodesmidae is a family of flat-backed millipedes in the order Polydesmida. There are about 7 genera and 17 described species in Nearctodesmidae.
Achemenides is a genus of millipedes in the family Conotylidae. There is at least one described species in Achemenides, A. pectinatus.
Endere is a genus of millipedes in the family Cambalidae. There is at least one described species in Endere, E. disora.
Euryurus is a genus of flat-backed millipedes in the family Euryuridae. There are about 14 described species in Euryurus.
Anamastigona is a genus of millipedes in the family Anthroleucosomatidae. There are about 20 described species in Anamastigona, found mainly in Europe and the Middle East.
Schizopetalum is a genus of crested millipedes in the family Schizopetalidae. There is at least one described species in Schizopetalum, S. koelbeli.
Ophyiulus is a genus of millipedes in the family Julidae. There are more than 30 described species in Ophyiulus.
Attemsiidae is a Palaearctic family of millipedes belonging to the order Chordeumatida. Adult millipedes in this family have 30 segments.
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