Fig. 72 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 72. Calcareous (dolomitised) spicules from the lower Cambrian Erkeket Formations, Khorbusuonka River, Siberia, Russia; samples 19/4.25 (H, I), 19/5.5 (A, J), 19/8.5 (D), 19/10.25 (C), 19/11.75 (E, G), 19/25.5 (B, F), and 20/1B (K). A–H. Dodecaactinella sp., SMNH Sp11430–11437, respectively. I–K. Sulugurella sp., SMNH Sp11438–11440, respectively. Scale bar 250 µm.