Phylogeography of the Oriental dobsonfly, Neoneuromus ignobilis Navás, suggests Pleistocene allopatric isolation and glacial dispersal shaping its wide distribution. (14th September 2021)

• Record Type: Journal Article
• Authors: Lin, Aili; Cao, Lijun; Wei, Shujun; Liu, Xingyue
• Is Part Of: Systematic entomology. Volume 47:Number 1(2022)
• Page Start: 65
• Page End: 81
• Publication Date: 2021-09-14
• Subjects: Insects -- Classification -- Periodicals; Entomology -- Periodicals; 595.7012
• DOI: 10.1111/syen.12519
• Languages: English
• ISSNs: 0307-6970

Abstract

Abstract: We explored the population structure and demographic history of an endemic but widespread Oriental dobsonfly, Neoneuromus ignobilis Navás (Megaloptera: Corydalidae), based on mitochondrial genomic and microsatellite datasets. Our results show that the 20 geographical populations of N. ignobilis presently sampled in East and Southeast Asia belong to five major lineages discriminated as southern Vietnam, Yunnan + Laos + northwestern Vietnam, southwestern Guangxi, central China and eastern China. We propose that early differentiation of populations probably occurred in Indochina and Yunnan due to vicariance events, and that populations from central and eastern China might have originated from southwestern Guangxi by dispersal. The continuous population expansion since the last interglacial, as revealed by demographic history and niche modelling analyses, explains the widespread pattern of N. ignobilis and highlights the relatively weak impact of the Quaternary glaciations on the East Asian biota. Abstract : The population genetics and phylogeographic history of an Oriental endemic dobsonfly species, Neoneuromus ignobilis, was investigated based on mitogenomic and microsatellite datasets. Our results suggested early population differentiation during the early Pleistocene driven by geographic vicariance formed by orogeny from Indochina and Yunnan. We found a continuous population expansion since the last interglacial and dispersals over central and eastern China from Guangxi in N. ignobilis, demonstrating mild impact of the Quaternary glaciations in East Asia.