FIG. 5 in A Boreal serpulid fauna from Volgian-Ryazanian (latest Jurassic-earliest Cretaceous) shelf sediments and hydrocarbon seeps from Svalbard

FIG. 5. — Ecology of serpulids from latest Jurassic-earliest Cretaceous seep carbonates from Spitsbergen, Svalbard: A, specimen of Propomatoceros sp. attached to exposed carbonate surface (white arrow) (PMO 225.171), seep 3; B, serpulid tube attached to bioclast (black arrow) with surface covered with smaller serpulid tubes (white arrows) (PMO 214.757), seep 9; C, serpulid tube partially filled with dark authigenic micrite; some microborings visible close to the surface (white arrow) are filled with dark authigenic micritie (PMO 214.723),seep 9; D, serpulid tube filled with authigenic botryoidal cement (PMO 171.023B), seep 13. Scale bars:A, B, 2 mm; C, D, 1 mm.