© INVERTEBRATE ZOOLOGY, 2017.On the basis of original and literary data on ultrastructure of spermatozoa and their formation the reconstruction of main pathways of evolution of male gametes of Acoelomorpha and free-living ...

© 2015 r. The ultrastructure of spermatozoa and spermatids in a the rhabdocoel turbellarian Provortex karlingi from the White Sea is described for the first time. Among the unusual morphological features of spermatozoa, ...

The data on the ultrastructure of spermatozoa and oocytes and their development in the marine tricladid Uteriporus vulgaris are described for the first time. The conservativeness of the spermatozoal morphology in Tricladida ...

© 2014, Pleiades Publishing, Inc. The ultrastructure of oocytes in four Acoela species representing different families (Archaphanostoma agile, Otocelis rubropunctata, Symsagittifera japonica, and Amphiscolops sp.) and of ...