Global distribution of Paracaprella pusilla and the genus Paracaprella a Current worldwide distribution of P. pusilla including its introduced range and the proposed native range. Information based on Ros and Guerra-García (2012) and references therein; Ros et al. (2013c); Ros et al. (2014); Ros et al. (2016a); Alarcón-Ortega et al. (2015); Alfaro-Montoya and Ramírez-Alvarado (2018); and Fersi et al. (2018) b Number of Paracaprella species recorded per marine ecoregions. Information based on Winfield and Ortiz (2013); Mauro and Serejo (2015); Sánchez-Moyano et al. (2015); Lacerda and Masunari (2014). Marine ecoregions follow Spalding et al. (2007).