Marked sperm dimorphism in the ground beetle Scarites terricola: a novel type of insect sperm polymorphism
Marked sperm dimorphism in the ground beetle Scarites terricola: a novel type of insect sperm polymorphism
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地甲虫 Scarites terricola 中显着的精子二态性：一种新型昆虫精子多态性
DOI：
10.1111/j.1365-3032.2009.00694.x
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发表时间：
2009
影响因子：
1.5
通讯作者：
K. Sasakawa
中科院分区：
文献类型：
--
作者：
K. Sasakawa
精子多态性描述了男性射精中含有两种或两种以上不同类型精子的现象。在昆虫中，精子多态性在双翅目、半翅目、膜翅目、鳞翅目和鞘翅目中被识别为四种类型。本研究将陆地甲虫（鞘翅目：甲虫科）的二态精子描述为昆虫精子多态性的一种新类型。从精子包囊和男性精囊中提取的精子在光镜下被检查，两者都显示出明显的二态性。一种类型的精子形成束状，其中许多精子的头部被“粘”在一起，尾巴自由移动。另一种是自由的单精子，有一个不成比例的大脑袋和一个细长的尾巴。这两种类型在林格解中都是可移动的。讨论了这些发现的适应性和系统发育重要性。
Sperm polymorphism describes the phenomenon of male ejaculates containing two or more distinct types of sperm. In insects, four types of sperm polymorphism are recognized in species from the orders Diptera, Hemiptera, Hymenoptera, Lepidoptera and Coleoptera. The present study describes dimorphic sperm of the ground beetle Scarites terricola (Coleoptera: Carabidae) as a novel type of sperm polymorphism in insects. Sperm from the spermatophore and male seminal vesicles are examined at the light‐microscopic level, and both display marked dimorphism. One type has sperm formed into bundles, in which the head of numerous spermatozoa are ‘glued’ together, with tails free‐moving. The other type are free as single spermatozoa and have a disproportionately large‐sized head and an elongated tail. Both types are motile in Ringer's solution. The adaptive and phylogenetic importance of these findings is discussed.