“…Among 17 species presently recognized (Warren, 1991;Blake et al, 2009;Magalhães and Bailey-Brock, 2012;Silva et al, 2016), Capitella capitata (Fabricius, 1780) had long been considered to have a cosmopolitan distribution (Blake, 2009). However, various studies focusing on its anatomy, development, and physiology (e.g., Grassle and Grassle, 1976;Eckelbarger and Grassle, 1983;Gamenick et al, 1998;Linke-Gamenick et al, 2000;Méndez, 2002Méndez, , 2006 suggested that nominal 'C.…”