Map showing the worldwide distribution of Ianiropsis serricaudis and I. cf. serricaudis. Ianiropsis serricaudis – type material (green circle), I. serricaudis – additional records (red circle), I. cf. serricaudis (yellow square). Data from: Gurjanova (1936); Kussakin (1962, 1988); Jang and Kwon (1990); Hobbs et al. (2015); Marchini et al. (2016); Ulman et al. (2017); Morales-Núñez and Chigbu (this study).