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Semicystic, a rare type of spermatogenesis, was detected in the characid Hemigrammus marginatus and characterized by cysts hatching during the spermatid phase and maturation of the spermatozoa being completed at the lumen of the anastomosed seminiferous tubules. Primary spermatogonia, or type A, are distributed along the entire length of the seminiferous tubules, in an unrestricted spermatogonial...