Comparative ultrastructure study on the sperm morphology of two grapsid crabs
Journal Title: International Journal of Life Science - Year 2018, Vol 6, Issue 2
Abstract
The study envisaged the spermatozoon morphology of two grapsid crabs, Grapsus albolineatus and G. tenuicrustatus (Family: Grapsidea) via, electron microscope. The marked spermatozoa similarities between these two species appear to indicate a close phylogenetic proximity with the Grapsidae family. With few variations such as the absence of acrosome ray zone and thickened ring in the posterior acrosome, the spermatozoa of these two crabs display the features of thoracotreme synapomorphy. The distinct variations between these two species are the presence of onion ring in the peripheral outer acrosome layer of G. tenuicrustatus, and capsular flange in G. albolineatus. Apart from the other thoracotreme characters, the spermatozoa of these two crabs possess a protective outer sheath with striking differences.
Authors and Affiliations
R Thanamalini, Suganthi A Shyla, V Ganapiriya
Keywords
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