Gonopod-diagnosis
Guides
Orophe unicus
Orophe unicus is a robust millipede in the family Xystodesmidae endemic to the Rocky Mountains of northern Idaho. Originally described as Chipus unicus in 1953, it was transferred to Orophe in 1964 and has undergone taxonomic revision due to its close similarity to Orophe cabinetus. The species is distinguished from its sister species primarily by subtle differences in gonopod structure and by geographic separation, though recent observations suggest their ranges may be closer than previously recognized.