The tangled biogeographic history of tarantulas: An African centre of origin rules out the centrifugal model of speciation

Author:

Biswas Aritra1ORCID,Chaitanya Ramamoorthi2,Karanth K. Praveen1

Affiliation:

1. Centre for Ecological Sciences Indian Institute of Science Bangalore India

2. School of Zoology Tel Aviv University Tel Aviv Israel

Abstract

AbstractAimMany animal groups diversify at the same place where they have originated, whereas others diversify at a place completely different from the centre of origin. Identification of the centre of origin, subsequent colonisation and diversification is crucial for understanding lineages' macroevolutionary dynamics and biogeographical patterns. The historical biogeography of the Mygalomorph spider family Theraphosidae has been confounded by two conflicting hypotheses – a South American origin for the group, which is also the centre of its greatest extant diversity, as against an African origin. We aim to ascertain the centre of origin and directionality of inter‐continental dispersal events in tarantulas by reconstructing their biogeographic history.LocationWorldwide.TaxonTarantulas.MethodsWe calibrated a previously published genome‐scale phylogeny of Mygalomorph spiders using an improved interpretation of the fossil record. We reconstructed ancestral geographic ranges using the R packagebiogeobearsto explicitly test four different hypotheses that are likely to explain the extant diversity and distribution of tarantulas incorporating a time‐stratified approach.ResultsOur results indicate that the ancestral stock of extant tarantulas occurred in Africa and South America during themid‐Cretaceous, but subsequently went extinct in South America. This points to an African origin for all modern tarantula lineages. The best supported biogeographic model suggests multiple ‘out of Africa’ dispersal events into South America and later into India during the late Cretaceous.Main ConclusionLocalised ecological processes such as extinction, dispersal, key innovations, hybridisation and species–area relationships might cause a discordance between centre of origin and diversity.

Publisher

Wiley

Subject

Ecology,Ecology, Evolution, Behavior and Systematics

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3