Julus
Linnaeus, 1758
Species Guides
1Julus is a of millipedes in the Julidae, order Julida. First described by Linnaeus in 1758, it is one of the most historically significant genera. occur across Eurasia, with documented in the Caucasus, Siberia, and Scandinavia. The genus exhibits notable morphological diversity, particularly in male genital structures and gnathochilarium characteristics.
Pronunciation
How to pronounce Julus: //ˈdʒuːləs//
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Identification
Males of some display strong in the gnathochilarium, including parabasal projections with circular bundles of elongated papillae or trichomes. Species-level identification relies on detailed examination of male , telopodite structures, and coxal outgrowths on leg pairs. For example, J. bengeli possesses a conical outgrowth on telopodite 1 of leg pair 1 and large anterior coxal outgrowths on leg pair 2 that are centrally thickened.
Images
Habitat
Leaf litter environments; altitudinal distribution patterns documented in some regions.
Distribution
Eurasia: documented from the Caucasus region (Russia), Russian Altais in southwestern Siberia, and Scandinavia. Specific localities include Krasnodar Province, Republic of Dagestan, and the Altai Mountains.
Diet
Leaf litter; at least one (Julus scandinavius) demonstrates selective feeding preferences among different leaf litter species.
Behavior
Selective feeding on leaf litter has been observed in J. scandinavius; broader -level behavioral patterns not established.
Ecological Role
Decomposer in leaf litter systems.
Similar Taxa
- J. ghilaroviMorphologically similar to J. bengeli; distinguished by absence of conical outgrowth on telopodite 1 of leg pair 1 and different coxal outgrowth structure on leg pair 2.
Sources and further reading
- BugGuide
- Wikipedia
- iNaturalist taxon
- NCBI Taxonomy
- Catalogue of Life
- The millipede genus Julus Linnaeus, 1758 in the Caucasus (Diplopoda: Julida: Julidae)
- Behavioural Preference of Julus scandinavius (Myriapoda) to Different Species of Leaf Litter
- Julus bengeli sp. nov., a new millipede from the Altais, Siberia, Russia, showing strong sexual dimorphism in the gnathochilarium (Diplopoda: Julida: Julidae)