Fig. 61 in Terreneuvian stratigraphy and faunas from the Anabar Uplift, Siberia

Fig. 61. Problematic calcium phosphatic sclerites Fomitchella infundibuliformis Missarzhevsky in Rozanov et al., 1969, from early Cambrian Medvezhya Formation, western flank of the Anabar Uplift, Siberia, Russia; samples K2/26 (A–C, E, F), K2/21 (D), 3/12.2 (G), section 3. A–G. SMNH X5917–5923, respectively. A1, D1, F1, G1, lateral; B1, C2, oblique lateral; A2, B2, C1, apertural; D2, E, F2, G2, apical views; C3, enlargement of C2 shows comarginally folded inner apertural margin; G3, enlargement of outer surface with comarginal folds and tuberculate outer surface of inner layer; F3, outer surface of sclerite margin with comarginal folds and fibrous outer layer. Scale bar 50 μm (C3, F3), 100 μm (G3), 250 μm (A, B1, C1, C2, D, E, F1, F2), 500 μm (B2, G1, G2).