Eutrichodesmus

Eutrichodesmus is a genus of millipedes in the family Haplodesmidae. Containing 54 species, this genus is among the genera with the greatest number of species not only in the family Haplodesmidae but also in the order Polydesmida. This genus includes the species E. peculiaris, notable for featuring sexual dimorphism in segment number: The adult females have 20 segments (counting the collum as the first segment and the telson as the last), but the adult males have only 19 segments. Millipedes in this genus are found in southern Japan, Taiwan, southern China, mainland Southeast Asia, Indonesia, and Vanuatu.