FIGURE 8 in Spirobranchus bakau sp. nov. from Singapore: yet another species of S. kraussii-complex (Polychaeta: Serpulidae)

FIGURE 8. Opercular endplates and talon in paratypes of Spirobranchus manilensis. A, B—Opercular endplate observed in majority of S. manilensis specimens with deeper and broader area of concavity than S. bakau sp. nov.; C—Side view of operculum of anomalous specimen in type series, showing slight protrusion of endplate from the top of the operculum; D—Top view of opercular endplate of specimen in C, faintly showing concentric ovoid markings; E—Opercular talon of a single S. manilensis specimen with deep concavity around the centre of the endplate; F—Lateral view of talon in E showing sub-rectangular shape with a series of tooth-like edges. Scale bars—A–C: 1 mm, D–F: 0.5 mm.