Spirobranchus manilensis ( Pillai, 1965 )

Shantti, Pavarne, Kupriyanova, Elena K., Quek, Zheng Bin Randolph, Yap, Nicholas Wei Liang & Teo, Serena Lay Ming, 2021, Spirobranchus bakau sp. nov. from Singapore: yet another species of S. kraussii-complex (Polychaeta: Serpulidae), Zootaxa 5040 (1), pp. 33-65 : 46

Spirobranchus manilensis ( Pillai, 1965)

Figs 6–8 ; Table 2

Figures

FIGURE 6. Tube morphology of Spirobranchus manilensis paratypes. A, B—Top view of individual tubes; C, D—Circular (C) and sub-trapezoidal (D) cross-sectional shapes of tubes; E, F—Lateral view of tubes with broad and rounded flap over tube mouth. Scale bars—A–B: 2 mm, C–F: 1 mm.

FIGURE 7. Opercular peduncles of Spirobranchus manilensis paratypes. A—Opercular peduncle of specimen; B–D—Peduncular wings of specimens as indicated by white arrow, with C and D showing wings on both sides of same individual. Scale bars—A–B: 1 mm, C–D: 0.5 mm

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.