Fig. 35 in Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities

Fig. 35. Median sections of phragmocones of Buttsoceras buldrebreenensis sp. nov. from bed PO 131, from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Specimen FMNH-P30421, heavily recrystallized phragmocone, ventral side toward the left, see Fig. 11B for interpretation. B–C. Specimen FMNH-P30430, septa are only partly preserved. C. Detail of B with loxochoanitic septal neck and connecting ring relatively well preserved. Scale bars: A–B = 5 mm; C = 1 mm.