Geographical and seasonal evidence of cryptic diversity in the Baetis rhodani complex (Ephemeroptera, Baetidae) revealed by means of DNA taxonomy

摘要: Previous phylogenetic investigations on the mayfly Baetis rhodani Pictet from several European countries, excluding Italy, strongly suggested presence of cryptic species. Our paper reports a DNA-taxonomy analysis B. with additional populations coming Italian and UK sites, aims to identify potential species coalescent-based method (GMYC model) understand mechanisms local coexistence Twenty-five haplotypes samples five were identified added large dataset. A total 11 have been recognised, three them co-occured in one area. Such seem be phylogenetically over-dispersed tree temporally segregated, seasonal substitution pattern could explain apparently widespread distribution complex its ability adapt different temperatures food resources, justifying some differences observed relationship between water temperature, growth rates phenology documented field studies.