Arrup
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| Arrup | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Myriapoda |
| Class: | Chilopoda |
| Order: | Geophilomorpha |
| Family: | Mecistocephalidae |
| Genus: | Arrup Chamberlin, 1912 |
| Type species | |
| Arrup pylorus Chamberlin, 1912 | |
| Synonyms | |
| |
Arrup is a genus of soil centipedes in the family Mecistocephalidae.[1][2][3] This genus contains sixteen species.[4] These centipedes are found mainly in temperate regions of East Asia with some species found in Central Asia and California.[5][6] Most species in this genus are soil-dwellers, but the Japanese species Arrup akiyoshiensis was discovered in a cave and might be a troglobiont.[7]
The American biologist Ralph V. Chamberlin first proposed this genus in 1912 to contain a newly discovered centipede, Arrup pylorus, which he designated as the type species.[8] In 2003, a cladistic analysis of the family Mecistocephalidae based on morphology placed the genus Arrup in the subfamily Arrupinae, along with the genera Agnostrup, Nannarrup, and Partygarrupius.[6] Further cladistic analysis of the subfamily Arrupinae based on morphology placed the genus Arrup in a clade with Nannarrup as a closely related sister group.[9] This analysis also placed this clade inside another clade with Agnostrup as a sister group in the same branch of a phylogenetic tree.[9] In 2024, however, a phylogenetic analysis based on molecular data placed Arrup by itself on the most basal branch in a phylogenetic tree of the family Mecistocephilidae, with a sister group including Agnostgrup and Nannarrup together in a separate clade.[10]