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不再被忽视:在Solifugae中,更高层次的关系的族群基因组解决
Siddharth S Kulkarni1, Hugh G Steiner1, Erika L Garcia2
1Department of Integrative Biology, University of Wisconsin-Madison, Madison, WI 53706, USA.
iScience
|September 11, 2023
概括
这项研究解决了Solifugae (驼蜘蛛) 的基因组,揭示了古热带辐射中的两个主要群体. 根据进化历史和地理,建立了新的子顺序Boreosolifugae和Australosolifugae.
科学领域:
- 关节动物的分类学.
- 切利谢拉特的进化过程
- 蜘蛛类系统学
背景情况:
- 索利弗格 (驼蜘蛛) 缺乏更高层次的系谱,阻碍了对它们的进化关系的理解.
- 以前的分子研究是有限的,形态特征很难诊断.
- 驼蜘蛛以侵略性,速度和性适应性而闻名,但它们的进化历史仍然不清楚.
研究的目的:
- 为了建立第一个更高层次的类型学,对于 Solifugae.
- 研究驼蜘蛛的进化历史和生物地理.
- 根据遗传学和生物地理数据,正式定义新的子顺序.
主要方法:
- 在所有现存的Solifugae家族中使用超保存元素 (UCE) 进行了家族基因组分析.
- 化石校准用于差异时间估计.
- 整合形态和生物地理数据.
主要成果:
- 对Solifugae的精确分类被恢复,揭示了古热带辐射中的两个新世界群.
- 差异时间估计表明Solifugae辐射在珀米亚,大多数家庭在白纪古纪灭绝之前.
- 两个新的子顺序,Boreosolifugae (Laurasian) 和Australosolifugae (Gondwanan),已经建立.
结论:
- 这项研究为Solifugae提供了一个强大的遗传学框架,解决了长期存在的系统性不确定性.
- 生物地理模式表明,大陆的分裂显著影响了solifuge的多样化.
- 波雷索利福盖和澳大利亚索利福盖的建立反映了由古代地质事件驱动的主要进化分裂.
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