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Sexual dimorphism can evolve under sexual selection or ecological factors. Sexually dimorphic male prosomal modifications are associated with gustatorial courtship in erigonines. The modifications vary from moderate elevations to bizarre shapes. Males transfer substances from these structures to females, which affect mate acceptance and fecundity. Here, we explore lability of these traits by investigating if modified prosomata are inherently linked to secretory glands, if glands evolved priordoi:10.1101/2021.05.22.444967 fatcat:6rtf7mbb4nb5jaopz5ig4zabjq