Figure 37 in Etudes on iurids, II. Revision of genus Calchas Birula, 1899, with the description of two new species (Scorpiones: Iuridae)

Figure 37: Key morphometric ratio differences in species of Calchas based on 28 sets of measurements. Top. Metasomal segment V proportions (length/width) show that metasomal segment V is considerably more slender in C. nordmanni than in the other two species, exhibiting considerable standard error as well as absolute range separation. Differences in mean values between C. nordmanni and the other two species, male|female, is as follows: C. birulai = 24.2 %| 27.1 %, C. gruberi = 27.4 %|23.8 %. Bottom. Telson proportions (telson length / vesicle length) show that species C. nordmanni and C. birulai have a longer vesicle than that seen in C. gruberi. The mean value differences between C. gruberi and the other two species (combined) is 13.8 % male and 16.2 % female. Also of interest in both sets of ratios, we see that the differences between the genders across species are negligible.