The ejaculatory complex in water The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics ejaculatorycompl00barr Year: 1972 Fig. 6 Postulated action of the distal arm sclerites, transverse section: a, muscle group 1 relaxed; b, muscle group 1 contracted. Fig. 7 Postulated action of the sclerite groups of the EC, lateral view: a, all muscle groups relaxed; /, // and //7 are major sclerite groups; b, contraction of muscle group 4 rotates proximal chamber counter-clockwise; c, contrac- tion of muscle group 2 adducts Hi up to // and through /;

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The ejaculatory complex in water The ejaculatory complex in water mites (Acari:parasitengona) : morphology and potential value for systematics ejaculatorycompl00barr Year: 1972 Fig. 6 Postulated action of the distal arm sclerites, transverse section: a, muscle group 1 relaxed; b, muscle group 1 contracted. Fig. 7 Postulated action of the sclerite groups of the EC, lateral view: a, all muscle groups relaxed; /, // and //7 are major sclerite groups; b, contraction of muscle group 4 rotates proximal chamber counter-clockwise; c, contrac- tion of muscle group 2 adducts Hi up to // and through /; contraction of muscle group 1 spreads distal arm sclerites of / (see Fig. 6) and widens sperm passage; d, simultaneous contraction of muscle groups 5 and 3 vio- lently compresses proximal chamber and expels the contained mass of spermatozoa. 19

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