Juliformia
| Juliformia Temporal range:
| |
|---|---|
| |
| Sagmatostreptus strongylopygus (Spirostreptidae) from Tanzania | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Myriapoda |
| Class: | Diplopoda |
| Subclass: | Chilognatha |
| Infraclass: | Helminthomorpha
|
| Subterclass: | Eugnatha |
| Superorder: | Juliformia Attems, 1926 |
| Orders | |
| Synonyms | |
|
Opisthospermophora Verhoeff, 1900 | |
Juliformia is a taxonomic superorder of millipedes containing three living orders: Julida, Spirobolida, and Spirostreptida, and the extinct group Xyloiuloidea known only from fossils.
Morphology
The species possess long cylindrical bodies with
collum (first body segment) which overhangs the rear of the head.[4]
-
Simplified cross section (A) and side view (B) of a juliform millipede segment -
Male Ommatoiulus moreleti (Julida, Julidae) showing juliform characteristics: large collum, two pair of gonopods, and fused, cylindrical body segments. The hook-shaped first leg pair is unique to Julida.
Taxonomy
The
Lower Devonian to the Upper Pennsylvanian, Xyloiuloidea consists of four families and several genera. The group was formerly considered a suborder of Spirobolida, but newly discovered species in 2006 required a reconsideration of classification, and the order to which Xyloiuloidea belongs remains undetermined.[5]
References
- ^ Cloudsley-Thompson, J. L. 1968. Spiders, Scorpions, Centipedes and Mites: The Commonwealth and International Library. Pergamon Press, London pp. 20-47
- .
- ISBN 9780124142398.
- ^ "Putative apomorphies of millipede clades" (PDF). Milli-PEET: Millipede Systematics. The Field Museum, Chicago, IL. 26 September 2006. Archived from the original (PDF) on 26 December 2015. Retrieved 23 October 2014.
- .
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