Fig. 38 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 38. Sclerites of chancelloriid Archaeopetasus pachybasalis Kouchinsky sp. nov., from the lower Cambrian Tyuser Formation, lower reaches of the Lena River, Siberia, Russia; sample 21/21. A–H, J–L, P. Basal part of phosphatized sclerites, SMNH X11114–11125, respectively. A1, upper surface; A2, J2, oblique view on the upper surface; J1, L1, lateral view; C1, F1, lower surface; C2, F2, L2, oblique view on the lower surface of sclerites. I, M–O. Apical spines detached from the basal part of sclerites, SMNH X11126–11129, respectively. Scale bar 500 µm.