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Order Polyxenida - Bristly Millipedes

Millipede - Polyxenus Millipedes - Polyxenus Unknown Oregon Bristle Millipede - Polyxenus Polyxenus unsure Larva under bark. Bristly Millipede?
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Myriapoda (Myriapods)
Class Diplopoda (Millipedes)
Order Polyxenida (Bristly Millipedes)
Other Common Names
Pincushion millipedes, bristle millipedes, fuzzy millipedes
Pronunciation
pol-ee-ZEE-nid-uh
Synonyms and other taxonomic changes
Ancyrotricha Cook, 1895
Numbers
4 families worldwide, 2 of which are known from our area. 8 species known in the US over 3 genera. (1)
Size
Up to 4mm
Identification
Unique body shape: soft-bodied with distinctive tufts of setae. Never more than 17 leg pairs. 1-3 small ocelli.

Polyxenidae: Usually have ocelli, 8th antennal article shorter than article 7
Lophoproctidae: Lack ocelli, 8th antennal article equal in length or longer than article 7
Range
Worldwide. In Western Hemisphere occurs from southern Canada to Brazil. (2)
Polyxenidae, represented by Polyxenus, occurs throughout the United States (6 spp.). A second family, Lophoproctidae, has been recorded in the Florida Keys and Mexico and may occur in southern Texas (at least 2 spp.). (1)
See Also
May be confused with dermestid beetle larvae
Print References
Eisner, T., Eisner, M. and Deyrup, M. 1996. Millipede defense: use of detachable bristles to entangle ants. Proceedings of the National Academy of Science 93: 10848-19851. (PDF)
Megan Short & Varpu Vahtera (2017) Phylogenetic relationships of millipedes in the subclass Penicillata (Diplopoda) with a key to the genera, Journal of Natural History, 51:41-42, 2443-2461, DOI: 10.1080/00222933.2017.1380241
Works Cited
1.Checklist of the millipeds of North and Middle America
Richard L. Hoffman. 1999. Virginia Museum of Natural History Special Publications.
2.Centipedes and Millipedes, with an Emphasis on North American Fauna
Rowland M. Shelley. 1999. Emporia State University.