Fig. 4 in A new, unusual rhynchonellide brachiopod with a strophic shell from the Silurian of Iran

Fig. 4. Transverse serial sections of a cyrtioid spiriferid brachiopod Striispirifer? ocissimus Popov, Modzalevskaya, and Ghobadi Pour in Hairapetian et al., 2012; NMW 2011.11G.457 from Llandovery, Telychian, Niur Formation, sample K33/1, Boghu Mountains. Numbers indicate distance in mm from the tip of the ventral umbo.