Fig. 2
From: The male reproductive system of Hippolyte inermis Leach 1815 (Decapoda, Caridea)
Spermatozoa differentiation. a Spermatogonia diagram. b Transverse semithin section of the posterior lobes of testes. Toluidine blue stain. Scale bar, 40 μm. c Diagram and TEM microphotograph of primary spermatocytes. Scale bar, 2 μm. d Diagram and TEM microphotograph of secondary spermatocytes. Scale bar, 2 μm. e Diagram and TEM microphotograph of first spermatid. Scale bar, 2 μm. f Different views of spermatid tetrad and TEM microphotograph of one inmature spermatozoa. Scale bar, 2 μm. g Diagram and TEM microphotograph of spermatozoa. Scale bar, 2 μm. h SEM microphotograph of spermatozoa. Scale bar, 1 μm. Sptg spermatogonia, Sp 1 spermatocyte type 1, Sp 2 spermatocyte type 2, Spd spermatid, Spdt spermatid tetrad, Spz spermatozoa