''Apheloria'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of flat-backed millipedes in the family

Xystodesmidae Xystodesmidae is a family of millipedes. Its members often have very small distributional areas, with many species only known from a single locality. They are found across the northern hemisphere, with peak diversity in the Appalachian Mountains, ...

, occurring in the central and southeastern United States, and ranging as far north as southern Quebec, Canada.Hoffman, Richard L. 1999. Checklist of the millipeds of North and Middle America. Virginia Museum of Natural History Special Publications 8, pp. 293-296Marek, Paul; Tanabe, Tsutomu; Sierwald, Petra (2014
''A Species Catalog of the Millipede Family Xystodesmidae (Diplopoda: Polydesmida)''.
Special Publication 17. Virginia Museum of Natural History. pp. 7-9 They are aposematically colored in black and contrasting reds and yellows, and some species in the Appalachian Mountains resemble species of ''

Brachoria ''Brachoria'' is a genus of polydesmidan millipedes in the family Xystodesmidae inhabiting the Eastern United States. Also known as the Appalachian mimic millipedes, at least 30 species are known, with highest diversity in the Appalachian Moun ...

'' where they co-occur, a phenomenon known as

Müllerian mimicry Müllerian mimicry is a natural phenomenon in which two or more well-defended species, often foul-tasting and sharing common predators, have come to mimic each other's honest warning signals, to their mutual benefit. The benefit to Müllerian ...

References

Polydesmida Millipedes of North America {{myriapoda-stub