巴西特有的两种海鳗(A. parana和A. quilombola)(甲壳纲,十足目)精子的超微结构

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY
Milena R. Wolf , Christopher C. Tudge , Sérgio L.S. Bueno , Fernando J. Zara , Antonio L. Castilho
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引用次数: 0

摘要

先前发表的Aegla精子的超微结构有助于这一独特分类群的系统发育。本研究描述了另外两种卵磷脂的精子,parana和A. quilombola。精子由两个大小大致相同的半球和一个双层顶体囊泡组成;海苔属的两种特征。在a . parana和a . quilombola与澳大利亚特有的异种动物Lomis hirta (Lomidae)之间观察到的精子超微结构的相似性反映了姐妹群体关系,尽管两者来自世界不同地区和不同的环境。卵形精子与罗米斯精子具有相同的组织,包括由一层膜隔开的两个大小相等的半球,顶体囊泡中也有两层,外层被另一层膜包围。在Aegla中,精子微管臂的数量尚不清楚,但它们存在于细胞核和细胞质中。这一观察结果不同意精子臂仅存在于细胞核中,作为Aegla的独家特征,如先前提出的那样。脂滴和过氧化物酶体的存在仅在棉铃虫精子中观察到。在分析的所有标本中观察到的精子数量大大减少,这引起了人们对几种濒危物种保护的关注。此外,到目前为止,没有任何精囊似乎是鹰科的一个特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The ultrastructure of spermatozoa of two species of Aegla (A. parana and A. quilombola) (Crustacea, Decapoda) endemic to Brazil

The previously published ultrastructure of Aegla spermatozoa contributed to the phylogenetics of this unique taxon. The present study describes the spermatozoa of two additional aeglids, Aegla parana and A. quilombola. The spermatozoa consist of two hemispheres of the approximate same size and a bilayered acrosomal vesicle; both characteristics of the genus Aegla. The similarity of spermatozoa ultrastructure observed between A. parana and A. quilombola and the endemic Australian anomuran, Lomis hirta (Lomidae) reflects a sister group relationship, even though both are from different regions of the world and different environments today. Aeglid spermatozoa share the same organization with Lomis including the two equal size hemispheres separated by a membrane also two layers in the acrosomal vesicle with the external layer being surrounded by another membrane. The number of spermatozoa microtubular arms is unclear in Aegla, however, they are present in both the nucleus and cytoplasm. This observation does not agree with the presence of spermatozoa arms only in the nucleus, as an exclusive character for Aegla, as proposed previously. The presence of lipid-droplets and peroxisomes was observed only in the spermatozoa of A. quilombola. The greatly reduced number of spermatozoa observed in all specimens analyzed raises concerns about the conservation of several threatened species. In addition, the absence of any spermatophores seems to be a characteristic of the Aeglidae to date.

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来源期刊
CiteScore
3.50
自引率
10.00%
发文量
54
审稿时长
60 days
期刊介绍: Arthropod Structure & Development is a Journal of Arthropod Structural Biology, Development, and Functional Morphology; it considers manuscripts that deal with micro- and neuroanatomy, development, biomechanics, organogenesis in particular under comparative and evolutionary aspects but not merely taxonomic papers. The aim of the journal is to publish papers in the areas of functional and comparative anatomy and development, with an emphasis on the role of cellular organization in organ function. The journal will also publish papers on organogenisis, embryonic and postembryonic development, and organ or tissue regeneration and repair. Manuscripts dealing with comparative and evolutionary aspects of microanatomy and development are encouraged.
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