Fig. 28 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 28. Pelagiellid mollusc Aldanella sibirica Parkhaev and Karlova, 2011, from the lower Cambrian Erkeket Formation, Khorbusuonka River, Siberia, Russia; samples 11/16.05 (A, B, E–H) and 11/2B (C, D). A–H. Phosphatised shells, phosphatic coats and partially preserved phosphatic interal moulds, SMNH Mo194728–194735, respectively. A1, adapical view; A2, apertural view. B. Internal mould with probably diagenetic polygonal structures; B2, close-up showing polygons. Scale bar: 500 µm (F–H), 250 µm (A, B1, C–E), and 125 µm (B2).