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Fig. 13 | Frontiers in Zoology

Fig. 13

From: Male reproductive system of the deep-sea acorn worm Quatuoralisia malakhovi (Hemichordata, Enteropneusta, Torquaratoridae) from the Bering Sea

Fig. 13

Fine structure of the spermatozoa of Quatuoralisia malakhovi. a Spermatozoa in the histological section. b Bundles of spermatozoa in the testis cavity (SEM). c Spermatozoa united into bundles. d External structure of spermatozoa. e, f Internal structure of spermatozoa. av, acrosomal vesicle; cf, centriolar fossa; clr, cytoplasmic collarette; flg, flagellum; mb, mitochondrial body; ncl, nucleus; pam, periacrosomal material

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Frontiers in Zoology

ISSN: 1742-9994