Fig. 7 in The tube wall of Cambrian anabaritids

Fig. 7. Tiksitheca cf. licis Missarzhevsky, specimen SMNH X3410, same as in Fig. 6 after inner tube has been broken longitudinally to expose internal wall structure. A. Tube wall, with positions of B–E indicated. B. Close−up of A, showing chevron pattern inside flange and curved laminae within flange (cf. Fig. 11). C–E. Close−ups of A, showing oblique and partly sinuous growth laminae in non−flanged portions of the wall.