Fig. 1
From: Early cephalopod evolution clarified through Bayesian phylogenetic inference
Measurements and examples of specimens. A Measurements taken from longitudinal sections. Abbreviations: ch = conch height, sv = siphuncle position, fh = septal foramen height, sh = segment height, sl = segment length, cl = cameral length, sc = septal concavity, nl = septal neck length, br = brim height. B Polygrammoceras lineatum, Orthocerida, NRM Mo 3100. C Pictetoceras eichwaldi, Ellesmerocerida (Multiceratoidea), GIT 805-2. D Charactoceras kallholnense, “Barrandeocerida”, NRM Mo 8735. E Novacaroceras endogastrum, early Ellesmerocerida, NIGP 73824. F Pseudowutinoceras wuhaiense, Actinocerida, NIGP 54244. G Dideroceras longispiculum, Endocerida, NRM Mo 158235. Institutional abbreviations: GIT = Department of Geology, Tallinn University of Technology, Estonia; NIGP = Nanjing Institute of Geology and Palaeontology, China; NRM = Naturhistoriska Riiksmuset, Stockholm, Sweden. Scale bars = 1 cm