Fig. 18 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 18. Paterinid brachiopod Dictyonina pannula (White, 1874) from the middle Cambrian Yunkyulyabit-Yuryakh Formation, Khorbusuonka River, Siberia, Russia; sample 19/92. A, B, D. Ventral valves, SMNH Br151265–151267, respectively. A1, B3, view on the external surface; A2, B1, lateral view; A3, oblique lateral view; B2, posterior view. C. Dorsal valve, SMNH Br151268. C1, posterior view; C2, external surface. Scale bar 500 µm.