FIG. 3 in A Boreal serpulid fauna from Volgian-Ryazanian (latest Jurassic-earliest Cretaceous) shelf sediments and hydrocarbon seeps from Svalbard

FIG. 3. — Serpulids from background sediments and seep carbonate bodies, Spitsbergen, Svalbard: A-C,?Pyrgopolon decorata (Stolley, 1912): A, two large specimens showing the shape and external ornament of the tube (PMO 217.355A, B), Konusdalen; B, details of the external ornament of?Pyrgopolon decorata (PMO 317.355 A); C, acetate peel of the tube wall of?Pyrgopolon decorata (PMO 217.355 B). D-G,?Pyrgopolon aff. nodulosum (Lundgren, 1883): D, fragment of a tube (PMO 217.357), seep 3; E, acetate peel of the tube wall (PMO 217.357), seep 3; F, mass accumulation of?Pyrgopolon aff. nodulosum (PMO 226.601), Echinoderm bed, Janusfjellet; G, thin section of the tube wall of?Pyrgopolon aff. nodulosum (PMO 214.847), Echinoderm bed, Janusfjellet. Scale bars: A, 5 mm; B, 1 mm; C, E, G, 200 µm; D, 2 mm; F, 15 mm.