Animal Systematics, Evolution and Diversity

The Korean Society of Systematic Zoology (한국동물분류학회)
권호 표지

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
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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.

유미류와 하등 무미류 정충의 미세구조를 비교하고 미세구조적 형질에 의한 계통적 관계를 고찰하였다. 대부분의 유미류 정충은 subacrosomal rod, endonuclear canal, perforatorium, ring, marginal filament, 꼬리의 구성과 꼬리의 주축이 axial rod인7가지 양서 류의 원시 공유형질(symplesiomorphies)을 나타내었다. 하등 무미류 정충은 marginalfilament가 없으며 subacrosomal rod와 ring의 구조는 단지 Ascaphus와 Discoglossus의 두 속에서만 각각 보고되었다. 이러한 미세구조적 형질은 유미류와 하등 무 미류의 원시 공유형질로 간주되며 두 분류군 사이의 계통적 연속성을 보여준다. 또한 정자 꼬리의 구성, endonuclear canal과 perforatorium의 형성에서도 매우 밀접한 계통적 관계를 보여주었다.

Keywords

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