The genus was formerly included in the thrush familyTurdidae, but as with several other related genera, has now been shown to be correctly classified in the Old World flycatcher familyMuscicapidae, in which it is most closely related to the generaOenanthe (wheatears) andCampicoloides.[5][6]
Genetic and behavioural evidence has also resulted in several new species being accepted in the genus in recent years, most notably the splitting of the former broad "species"common stonechatSaxicola torquatus into five species, a change now widely though not yet universally accepted. With addition ofmtDNAcytochromebsequence andnDNAfingerprinting data, it was confirmed that not only theFuerteventura andRéunion stonechats are distinct species, but that in addition, theAfrican,Madagascar,European,Siberian andAmur stonechats are also all separate species.[7][8][9][10] Due to confusion ofsubspecies allocation, the nameS. torquatus was briefly used for the European species, with the African stonechat being incorrectly listed asS. axillaris.[8]
Owing to misunderstandings of Latin syntax, several species have in the past been widely but incorrectly cited with feminine name endings ("S. torquata, S. maura, S. leucura, S. ferrea", etc.).[11]
^Jobling, J.A. (2018). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.)."Key to Scientific Names in Ornithology".Handbook of the Birds of the World Alive. Lynx Edicions. Retrieved10 May 2018.