author(s)
Mark Ian Cooper

abstract
Sexual size dimorphism (SSD) was investigated in the millipede genus Sphaerotherium. Width was extracted from Attems (1928) monograph and used to compare interspecific variation in mean volumes using a geometric morphometric approach. Based on the formula for a sphere (4/3. Ï€. r³), volume was calculated in seven species and an allometric coefficient of 0.7 found. The allometric equation generated for the genus was Å· = 0.00251X + 57211.22445. Correlation between SSD and body sizes (R = 0.749728; P = 0.00202; n=7) does now reject Rensch’s rule in Sphaerotherium.