ZooKeys 936: 1–24 (2020) A peer-reviewed open-access journal doi: 10.3897/zookeys.936.38587 RESEARCH ARTICLE http://zookeys.pensoft.net Launched to accelerate biodiversity research Habitat requirements affect genetic variation in three species of mayfly (Ephemeroptera, Baetidae) from South Africa Chantal L. Taylor1, Nigel P. Barker2, Helen M. Barber-James1,3, Martin H. Villet1, Lyndall L. Pereira-da-Conceicoa4 1 Department of Zoology and Entomology, Rhodes University, Somerset Street, Makhanda (Grahamstown), 6140, South Africa 2 Department of Plant and Soil Sciences, University of Pretoria, Pretoria, 0028, South Africa 3 Department of Freshwater Invertebrates, Albany Museum, Somerset Street, Makhanda (Grahamstown), 6140, South Africa 4 Department of Natural Sciences, National Museums Scotland, Edinburgh, Chambers Street, EH1 1JF, United Kingdom Corresponding author: Martin H. Villet (
[email protected]) Academic editor: B. Price | Received 27 July 2019 | Accepted 4 November 2019 | Published 28 May 2020 http://zoobank.org/39F4538A-E197-47CA-876E-E8F82656E647 Citation: Taylor CL, Barker NP, Barber-James HM, Villet MH, Pereira-da-Conceicoa LL (2020) Habitat requirements affect genetic variation in three species of mayfly (Ephemeroptera, Baetidae) from South Africa. ZooKeys 936: 1–24. https://doi.org/10.3897/zookeys.936.38587 Abstract This study investigates genetic diversity in three species of Ephemeroptera, one eurytopic and therefore widespread (Afroptilum sudafricanum) and two stenotopic and thus endemic (Demoreptus natalensis and Demoreptus capensis) species, all of which co-occur in the southern Great Escarpment, South Africa. Mi- tochondrial DNA was analysed to compare the genetic diversity between the habitat generalist and the two habitat specialists. Afroptilum sudafricanum showed no indication of population genetic structure due to geographic location, while both Demoreptus species revealed clear genetic differentiation between geo- graphic localities and catchments, evident from phylogenetic analyses and high FST values from AMOVA.