The phylogeny of fiddler crabs is still largely unresolved. Two trees are shown below: one just the subgenera and one including all species. These are both rough, conservative estimates based on combining information from Levinton et al. (1996), Sturmbauer et al. (1996), Rosenberg (2001), Shih et al. (2009), Shih et al. (2010), Shih et al. (2012), Shih et al. (2013), and Landstorfer & Schubart (2010).