一个有针对性的基因遗传学框架,用于研究高度多样化但在地理上受到限制的红魔蜘蛛 (Araneae,Dysderidae) 的多样化
Silvia Adrián-Serrano1,2, Martina Pavlek1,2,3,4, Miquel A Arnedo1,2
1Departament Biologia Evolutiva, Ecologia i Ciències Ambientals, Universitat de Barcelona, Av. Diagonal 645, E-08028, Barcelona, Spain.
概括
这项研究揭示了Dysderidae蜘蛛的进化历史,证实了Rhodinae和Dysderinae亚家族,但挑战了Harpacteinae. 它还确定了Dysdera.属的多样化速率的转变.
科学领域:
- 类动物学 类动物学 类动物学
- 进化生物学 进化生物学
- 人类遗传学 是一个学科.
背景情况:
- 在地中海地区丰富的蜘蛛家族Dysderidae,表现出偏向的物种分布,其中大多数属于Dysdera和Harpactea属.
- Dysderidae为人们提供了有关热带专业化的见解,神秘的女性选择,适应性辐射和地下殖民的见解.
- 遗传学结构的缺乏阻碍了Dysderidae的进化和生物地理研究.
研究的目的:
- 使用全面的多位置数据集重建Dysderidae的遗传结构.
- 估计分歧时间,并识别家庭内部多样化率的变化.
- 重新评估Dysderidae亚家族,特别是Harpacteinae的分类学有效性.
主要方法:
- 使用线粒体 (cox1, 16s, 12s) 和核基因 (h3, 28s, 18s) 的多位基因基因分析.
- 包括104种Dysderidae和83种相关物种的详尽分类学样本.
- 使用化石和生物地理校准估计分离时间.
主要成果:
- 对于Rhodinae和Dysderinae亚家族的单支持; Harpacteinae被拒绝,如目前所定义的.
- 在Harpacteinae中的族系学分类与当前的分类学不一致.
- 家庭起源可能是庞盖亚分裂后的;洞穴殖民可能比以前认为的更古老.
- 在Dysdera属的基础上发现的多样化速率的显著变化.
结论:
- 目前的Harpacteinae分类需要修订.
- 迪斯德拉属经历了显著的多样化速度加速.
- 需要进一步的研究来探索Dysdera多样化的驱动因素,可能与饮食有关.
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