oa Madoqua - Extracuticular secretion on a Namib Desert Tenebrionid, Onymacris plana: an indicator of aridity



Adults of the Adesmine tenebrionid beetle Onymacris plana secrete varying amounts of a bluish-white wax bloom related to their location in the climatic gradient of the central Namib desert. The material, produced by dermal glands and their associated secretory cells, forms whorls which anastomose covering the otherwise black cuticle.


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