Spionidae

Wong, Eunice, Kupriyanova, Elena K., Hutchings, Pat, Capa, María, Radashevsky, Vasily I. & Hove, Harry A. ten, 2014, A graphically illustrated glossary of polychaete terminology: invasive species of Sabellidae, Serpulidae and Spionidae, Memoirs of Museum Victoria 71, pp. 327-342 : 331

cirriform ( Spionidae ): bearing cirri ( fig. 3a ).

collar ( Sabellidae and Serpulidae ): a more or less encircling membranous flap projecting from the peristomium and, in some cases, covering the base of the radiolar crown ( fig. 3c ).

collar chaetae ( Sabellidae and Serpulidae ): notochaetae of the first (collar) chaetiger not accompanied by neuropodial uncini ( fig. 3d ).

collar segment ( Sabellidae and Serpulidae ): first chaetiger, often bearing a membranous collar and notochaetae (see collar chaetae), but lacking uncini ( fig. 3e ).

companion chaetae ( Sabellidae ): chaetae with a basal shaft and a distal hood, arranged in a single row, parallel to the row of thoracic uncini ( fig. 3b ).

companion chaetae ( Spionidae ): short capillary chaetae, usually distally bilimbate, accompanying heavy falcate spines on segment 5 in polydorins (members of the tribe Polydorini ) ( fig. 5g ).

constriction ( Serpulidae ): narrowing of the opercular peduncle at base of opercular funnel or ampulla ( fig. 3f ).

constriction ( Spionidae ): narrowing of the upper part of hook shaft ( fig. 3g ).

Figures

Figure 3. (a) Cirriform pygidium of Pygospio elegans, stained with methyl green; arrow points to a cirrus. (b) Companion chaetae (arrows) as parallel row anterior to thoracic uncini in Sabella spallanzanii (left) and Bispira manicata (right, stained with methylene blue). (c) Arrows point to collar flaps in Laonome calida (left) and Spirobranchus cariniferus (right), both stained with methylene blue. (d) Collar/thoracic regions of Laonome triangularis (left, stained with methylene blue) and Ficopomatus enigmaticus (right); arrows point to collar chaetae. (e) Collar segments indicated by different arrows in (left to right, respectively) Branchiomma galei, Laonome triangularis (stained with methylene blue) and Spirobranchus cariniferus (stained with methylene blue). (f) Constrictions, indicated by arrows, occurring below funnels in opercula of Hydroides malleolaspinus and Hydroides minax. (g) Constriction, indicated by arrow, in upper shaft of neuropodial hooks of Polydora uncinata. (h) Opercula of Spirobranchus polytrema, S. cariniferus and S. tetraceros (left to right, respectively); arrows indicate distal wings. All scales in mm.

Figure 5. (a) Arrows indicate hood on collar chaetae of Laonome triangularis (left 2 images), Laonome calida and thoracic chaetae of Crucigera websteri (SEM image). (b) Arrow indicates hood in neuropodial hooks of Polydora uncinata. (c) Hooks in posterior neuropodia of Polydora uncinata. (d) Radioles proximally connected by inter-radiolar membranes (arrows) in Sabella spallanzanii and Spirobranchus cariniferus (stained with methylene blue). (e) Inter-ramal eyes (arrows) located between notopodia and neuropodia of Branchiomma galei and Branchiomma bairdi. (f) Calcareous tubes of Spirobranchus cariniferus (left) and Spirobranchus kraussii (right); arrows indicate keels on tube. (g) Falcate spines in notopodia of chaetiger 5 of Polydora uncinata; arrow indicates lateral flange. (h) Lobate condition in collars of (left to right, respectively) Spirobranchus cariniferus (stained with methylene blue), Sabella spallanzanii and pygidium of Polydora ciliata (stained with methyl green). Lobes highlighted red. All scales in mm.