The goal of this work was to explain Sexual Size Dimorphism (SSD) in the diplopod genera Bicoxidens, Doratogonus, Harpagophora, Julomorpha, and Orthoporoides, in which length, width, and rings are the primary components of interspecific variation. The data sets for B. brincki Schubart, [1] D. annulipes Carl, 1917, H. spirobolina (Karsch, 1881), J. hilaris Attems, 1928, J. panda (Attems, 1928), and O. tabulinus (Attems, 1914) were checked for normality. Male and female lengths differed in all species except J. hilaris, which had differing widths. Juliform millipedes appear to have shrunk in size through time, and this study reveals an intriguing finding: larger species have sexual dimorphism based on length, while smaller species have sexual dimorphism based on width. This is because of the limits imposed by a cylindrical body form, which may be modified more forcefully by reducing width than than length.
Author(S) Details
Mark Cooper
School of Animal, Plant & Environmental Sciences, University of the Witwatersrand, Johannesburg 2050, South Africa
View Book:- https://stm.bookpi.org/NVBS-V8/article/view/5385
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