Abstract
Summary Spermatozoal morphology of the anomuran crab Cervimunida johni was investigated using scanning and transmission electron microscopy. The spermatozoon has an elongate shape and exhibits a total length of 22.7 μm with a maximum width of 4.4 μm. Three parts can be distinguished: (1) the elongate-ovoid acrosome located anteriorly, measuring 7.7 μm in length and 2.7 μm in width; (2) the cytoplasmic region, 3.0 μm in length and 1.5 μm in width; and (3) the nuclear region measuring 11.9 μm in length and 4.4 μm in width. The acrosome is composed of a thick electron-dense wall and a less electron-dense subacrosomal space showing actin-like filaments. The cytoplasmic region connects the acrosome with the nucleus, and three arms filled with microtubules arise from this region. The cytoplasm contains irregular mitochondria. The elongate nucleus has uncondensed DNA, its outer surface is highly folded and shows three principal longitudinal grooves. The microtubular arms are located in these three nuclear groove...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
