| Summary: | Fig. 9. Orthoconic cephalopods with large siphuncles from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A–B, D–E. Buttsoceras buldrebreenense sp. nov. A–B. Specimen FMNH-P30422, from bed PO 131. A. Adoral view of septum and septal perforation. B. Lateral view with prosiphuncular side toward right. C. Cyptendoceratid genus and species indet., FMNH-P30431, from bed PO 131. D. Specimen FMNH-P30423, from bed PO 131, lateral view. E. Specimen FMNH-P30421, holotype, lateral view, note faint transverse ornament partly preserved. F–G. Cyptendoceras sp. A, FMNH-P30426, from bed PO 07. F. Ventral view, prosiphuncular side. G. Adoral view of septum and septal perforation. H–I. Proterocameroceras valhallfonnense sp. nov., FMNH-P30277, from bed PO 131. H. Ventral view, prosiphuncular side. I. Adoral view of septum and septal perforation. Scale bar = 10 mm for all figures. Published as part of Kröger, Björn & Pohle, Alexander, 2021, Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities, pp. 1-102 in European Journal of Taxonomy 783 (1) on page 17, DOI:10.5852/ejt.2021.783.1601, http://zenodo.org/record/5793422
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