Fig. 47 in Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities

Fig. 47. Diagrams of whorl expansion rate (WER), whorl width index (WWI), and relative depth of impression zone (IZR) of Trocholitoceras walcotti Hyatt, 1894, T. latum Ulrich et al., 1942, and Litoceras profilbekkenense sp. nov. Measurements from specimens from the Olenidsletta Member (Olen. Mbr), Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen, and from type specimens based on Ulrich et al. (1942). See Supp. file 2 for details of measurements.