Ultrastructure of spermatozoa in Urodela and Primitve Anura(Amphilbia) with Phylogenetic Considerations

유미류와 하등 무미류 정충의 미세구조 비교와 계통적 고찰

  • 이영환 (대구대학교 생물교육과) ;
  • 권애숙 (대구대학교 생물교육과)
  • Published : 1996.09.01

Abstract

The ultrastructure of spermatozoa in urodeles and primitive anurans was examined and compared. The spermatozoa of urodeles are characterized by seven plesiomorphies in subacrosomal cone, endounclear canal. perforatorium, ring, marginal filament, undulating membrane and tail axis. Most primitive anuran spermatozoa have no marginal filament, subacrosomal cone and ring structure with the exception of having the subacrosomal cone in Ascaphus and the ring in Discohlossus as compared with those of urodeles. Persistence of the subacrosomal cone and the ring structure is typical in most urodeles and is further linked with the primitive anurans. Therefore, these characters are regarded as symplesiomorphies in urodeles and primitive anurans. The organization of sperm tail, endounclear canal and perforatorium indicates a close phylogenetic relationship between urodeles and the primitives anurans.

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