''Semionellus'' is a genus of

flat-backed millipede Polydesmida (from the Greek ''poly'' "many" and ''desmos'' "bond") is the largest order of millipedes, containing approximately 3,500 species, including all the millipedes reported to produce hydrogen cyanide (HCN). Description Members of the o ...

s 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, ...

. There are at least three described species in ''Semionellus''.

Species

These three species belong to the genus ''Semionellus'': * '' Semionellus michiganus'' (Chamberlin, 1946) * '' Semionellus placidus'' (Wood, 1864) * '' Semionellus tertius'' Chamberlin, 1948

Species

References

Further reading