FIGURE 1. A–F in A revision of the genera Galeolaria and Pyrgopolon (Polychaeta: Serpulidae), with discussions on opercular insertion as a character in their taxonomy and relationships, and their zoogeography

FIGURE 1. A–F: Galeolaria caespitosa Lamarck 1818, from Port Hacking, NSW, BM (NH) 1959.10.19.9–19 determined and presented by B. Dew. A: Whole worm. B, Anterior end of worm; the operculum clearly inserted independently of the branchial radioles of both sides. C, Anterior end of a worm viewed from the left, showing the following. Unfringed interradiolar membranes, an opercular plate bearing a marginal palisade of short rods, a group of medial spines, and a winged opercular peduncle. Note the mid-dorsal longitudinal groove along the peduncle which is a continuation of the faecal groove. D, Opercular peduncle viewed dorsally, showing the longitudinal mid-dorsal groove for passage of faecal matter. It also shows that the mid-dorsal rod of the marginal palisade of rods is specially adapted for deflecting faecal material wafted along the faecal groove of the opercular peduncle outwards, and away from the branchial crown. E & F, show opercular spines and basal plates; see text for description.