Fig. 75 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 75. Heteractinid spicules from the lower Cambrian Erkeket Formation, Khorbusuonka River, Siberia, Russia; samples 19/11.75 (C–I), and 19/12.75 A, B). A–I. Polyactinal spicules with multiple coplanar rays, SMNH Sp11486–11494, respectively. C1, plainview; C2, lateral view. Scale bar: 250 µm A–H) and 500 µm (I).