FIGURE 20. A–C. Parasabella aberrans. A–B in A taxonomic guide to the fanworms (Sabellidae, Annelida) of Lizard Island, Great Barrier Reef, Australia, including new species and new records

FIGURE 20. A–C. Parasabella aberrans. A–B. Live specimens; A. Anterior end, ventral view; B. Same, dorsal view, showing the fleshy swelling with a transverse ridge on first two chaetigers (arrow); C. Preserved specimens, showing a detail of the dorsal swelling, divided in two by a longitudinal incision; D–F. Parasabella sp. cf. P. japonica live specimens; D. Anterior end, side view; E. Radiolar crown, side view; F. Anterior chaetigers with detached radiolar crown; conspicuous ventral shields separated from neuropodial tori; G–J. Perkinsiana anodina, preserved specimens; G. Anterior end, lateral view. H. Same, dorsal view, showing collar margins separated dorsally; I. Specimen stained with methyl blue, anterior chaetigers, with detached crown, showing the length of thorax (arrow), and the stained ventral shields separated from neuropodial tori; J. Anterior chaetigers showing collar ventral lappets and well developed ventral sacs.