External morphology of the male of Cyclestheria hislopi (Baird, 1859) (Crustacea, Branchiopoda, Spinicaudata), with a comparison of male claspers among the Conchostraca and its bearing on phylogeny of the "bivalved" Branchiopoda

Key Points

• The study details the external morphology of male Cyclestheria hislopi, specifically noting unique aspects of male claspers.
• Key evidence includes a comparative analysis of male claspers among Conchostraca, aiding in understanding their evolutionary relationships.
• Observational analysis highlights distinct morphological traits that may influence the phylogenetic placement of bivalved Branchiopoda.
• Findings suggest further research may refine classifications and provide deeper insight into the evolutionary history of these crustaceans.