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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Evolution of sting and associated venom gland in Hymenoptera (Aculeata)
 Matějková, Zuzana ; Straka, Jakub (advisor) ; Šobotník, Jan (referee)
Theme: Evolution of the sting and associated glands in Hymenoptera (Aculeata) Author: Zuzana Matějková Supervisor: Mgr. Jakub Straka, Ph.D. Abstract A stinger is a synapomorphy of Aculeata group. The branch of Aculeata has cleaved from the Parasitica group - they both belong to the order Apocrita. The stinger of Aculeata has evolved from a former ovipositor - though the function of laying eggs has been lost. Besides venom gland several other glands including Dufour's gland vent into a stinger. The original (parasitic-predator strategy- binding) function of the gland excretes is a paralysis of the prey. In social Aculeata it gains a defensive function - associated with a possible act of autotomy of the stinger. The stinger and associated glands are also a source of pheromones and small peptides with an antimicrobial function. These peptides act together with other venom components and they help to improve its effectiveness.
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