“…Labrorostratus, with six described species, is commonly found in the coelomic cavity of Syllidae (Odontosyllis, Syllis, Eusyllis, Pionosyllis, Grubea, Sphaerosyllis, Haplosyllis and Pseudobrania), Nereididae (Perinereis) and Trichobranchidae (Terebellides), and can also be found free-living, among algae (Hernández-Alcántara and Solís-Weiss 1998). Amaral, 1977 (Figures 1-2; Table 1) Labrorostratus prolificus Amaral, 1977, p. 285, figures 1-8. Stage 1 (1-10 setigers).…”