Figure 7 in A graphically illustrated glossary of polychaete terminology: invasive species of Sabellidae, Serpulidae and Spionidae

Figure 7. (a) Operculum of Spirobranchus minutus (above) and Spirobranchus kraussii (below); arrows indicate opercular endplate. (b) Paleate collar chaetae of Laonome triangularis. (c) Arrows indicate palps of Polydora haswelli (stained with methyl green) and Boccardia proboscidea (live specimen). (d) Parapodia highlighted red in (left to right, respectively) Sabellastarte australiensis, Boccardiella bihamata (stained with methyl green) and Spirobranchus cariniferus (stained with methylene blue). (e) Arrows indicate peduncle of Hydroides norvegicus (stained with methylene blue) and Spirobranchus cariniferus. (f) Tubes of Ficopomatus enigmaticus and Ficopomatus uschakovi; arrows indicate peristomes. (g) Collar region/base of radiolar crown in Myxicola infundibulum stained with methylene blue; peristomium highlighted red. (h) Radioles of Bispira serrata and Bispira porifera; arrows indicate individual pinnules. (i) Anterior end of Hydroides norvegicus (stained with methylene blue); arrow indicates pseudoperculum. (j) Arrows indicate pygidium of Bispira serrata and Boccardia polybranchia (stained with methyl green). All scales in mm.