FIGURE 12 in A revision of the genus Petta Malmgren, 1866 (Annelida: Pectinariidae), with two new species from deep waters of southeastern Australia, and comments on phylogeny of the family

FIGURE 12. Line drawings of Petta williamsonae n. sp. Holotype (AM W.50667): A. Dorso-lateral view of anterior end; B. Ventral view of anterior end; C. Lateral ear-shaped lobe adjacent to the dorsal base of cephalic veil; D. Close-up view of branchia; E. Ventral view of posterior end; F. Dorso-lateral view of posterior end; G. Uncinus; H. Notochaeta from anterior row; I. Notochaeta from posterior row. Abbreviations: ac, anal cirrus; an, anus; ap, anterior peg; br, branchiae; bt, buccal tentacles; cv, cephalic veil; ct, chaetiger; dlp, dorso-lateral pad; dms, dorsal margin of scaphe; hb, hump of branchia; lb, lamellae of branchia; lel, lateral ear-shaped lobe; mat, major teeth; mit, minor teeth; nec, neurochaetae; noc, notochaetae; op, operculum; or, opercular rim; p, paleae; s, segment; sc, scaphe; tc, tentacular cirri; sh, scaphal hooks; vl, ventral lappet.