Independent origins of female penis and its coevolution with male vagina in cave insects (Psocodea: Prionoglarididae)
Independent origins of female penis and its coevolution with male vagina in cave insects (Psocodea: Prionoglarididae)
复制标题
DOI：
10.1098/rsbl.2018.0533
复制
发表时间：
2018-11-01
期刊：
影响因子：
3.3
通讯作者：
Kamimura, Yoshitaka
中科院分区：
文献类型：
--
作者：
Yoshizawa, Kazunori;Ferreira, Rodrigo L.;Kamimura, Yoshitaka
穴居动物sentibillini （Afrotrogla， Neotrogla和sensitibilia）具有特殊的形态学和进化意义，因为它拥有反向的交配器官：即Afrotrogla和Neotrogla的雌性有一个阴茎状器官。雌性阴茎的结构在不同的分类群中是高度可变的，就像雄性阴茎在具有正常交配器官的动物中的情况一样。在这里，我们提出了敏感billini的第一个分子系统发育和分析其生殖器的进化模式。非洲巨蛙和新巨蛙并没有形成一个单系进化分支，它们的雌性阴茎结构也有显著差异，这表明雌性阴茎在敏感billini中有两个独立的起源。在Neotrogla中，拥有简单雌性阴茎的物种被嵌入到拥有精致阴茎的物种中，而精致的雌性阴茎的详细结构在物种之间是完全一致的，这表明雌性阴茎的二次简化。男性和女性生殖器之间的相关进化模式也被发现。这种生殖器的共同进化可能表明，性冲突或神秘的“雄性”选择驱动了雌性阴茎的多样性，就像具有传统生殖器的动物的雄性阴茎多样性一样。
The cave-dwelling psocid tribe Sensitibillini (Afrotrogla, Neotrogla and Sensitibilla) is of special morphological and evolutionary interest because of its possession of reversed copulatory organs: i.e. females of Afrotrogla and Neotrogla have a penis-like organ. The female penis structure is highly variable among taxa, as is the case of the male penis in animals with normal copulatory organs. Here, we present the first molecular phylogeny of Sensitibillini and analyse the evolutionary pattern of their genitalia. Afrotrogla and Neotrogla did not form a monophyletic clade, and their female penis structures are significantly different, suggesting two independent origins of the female penis within Sensitibillini. In Neotrogla, the species that has a simple female penis is embedded among species that have an elaborate penis, and detailed structures of the female penis elaborations are in exact agreement among species, suggesting a secondary simplification of the female penis. A correlated evolutionary pattern between male and female genitalia was also detected. This coevolution of genitalia may suggest that sexual conflict or cryptic 'male' choice drove the diversity of the female penis, as is the case of male penile diversity in animals with conventional genitalia.