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Spermiogenesis in the spider, Pisaurina Sp.: A fine structure study
Author(s) -
Reger James F.
Publication year - 1970
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051300403
Subject(s) - spermiogenesis , flagellum , biology , acrosome , spermatozoon , golgi apparatus , microbiology and biotechnology , spermatid , flagellate , chromatin , anatomy , ultrastructure , nucleus , botany , sperm , endoplasmic reticulum , genetics , dna , semen , gene
A fine structure study of spermatids and spermatozoa of the spider, Pisaurina sp. demonstrates that early spermiogenesis is similar to other flagellate spermatozoa. An acrosome forms from a Golgi‐derived, acrosomal vesicle, a perforatorium indents acromosome and nucleus, a flagellum with a three‐plus‐nine tubule substructure is formed and nuclear chromatin condenses during spermiogenesis. Divergence from typical spermatozoa includes the presence of a three‐tubule substructure of the central flagellar shaft, progressive rounding‐up of late spermatids with concomitant incorporation of previously formed flagellum. This evidence is presented in terms of its possible functional significance in fertilization and gamete fusion in spiders.