Over the last few years peacock spiders have been placed variously into species groups based on morphological and behavioural similarities. The catalogue of peacock spiders written by Jurgen Otto and David Hill reflect these groupings. One can think of them as concepts or hypotheses, rather rather than proven facts, and each time a new species is discovered our view about these groups change. Almost certainly peacock spiders are a monophyletic group, meaning they had a single common ancestor from which they all evolved. This evolution was fairly rapid and various traits evolved multiple times. Girard et al (2021) produced the first analysis of peacock spider relationships using molecular data, confirming some groups but also suggesting others. Poorly studied is the relationship of peacock spiders with other jumping spiders. Molecular analysis, morphology and behaviour data all suggest a very close relationships between the genera Saitis and Maratus. Intriguingly though Satis barbipes, the type species of the genus Saitis, is only known so far from Europe, where Maratus does not occur. One hypothesis that tries to explain this is that Saitis barbipes occurs in Australia, even though it has not yet been found there, and was transported to Europe in modern times.