Citation: Sr. Gelder et al., A DESCRIPTION OF SPERMATOZOAN ULTRASTRUCTURE AND SOME ANATOMICAL CHARACTERS IN BRANCHIOBDELLA-KOZAROVI SUBCHEV, 1978 (ANNELIDA, CLITELLATA), AND REVIEW OF THE SPERMATOZOAN MORPHOLOGY WITHIN THE GENUS, Hydrobiologia, 278(1-3), 1994, pp. 17-26