Fig. 68 in An early Cambrian fauna of skeletal fossils from the Emyaksin Formation, northern Siberia

Fig. 68. Hyolithelminths Torellella sp. from lower Cambrian Emyaksin Formation, Bol'shaya Kuonamka River,Anabar Uplift, Siberia; erosion of tubes. A. SMNH X 4811, sample K6-4B; A 1, general view on the inner surface of the tube fragment; A 2, close-up of A 1 showing a rounded squared hole partially penetrating the wall. B. SMNH X 4812, sample 7/30; B 1, general view on the inner surface of the tube fragments; B 2, rounded edge of the tube fragment with penetrating holes; B 3, close-up of B 2; B 4, close-up of B 1. C. SMNH X 4813, sample 7/30; general view on the inner surface of the tube fragments. D. SMNH X 4814, sample 6/66.2; D 1 , close-up of D 2 , orthogonal orientation of fibres in adjacent layers of the wall; D 2 , general view of an eroded fragment of tube. E. SMNH X 4815, sample 7 /25.6; view on the outer surface. F. SMNH X 4816, sample 7/60; broken edge of a tube fragment with layers in the wall penetrated by holes. G. SMNH X 4817, sample 7/39.5; view on the inner surface. Scale bar: A , B , D , E, G, 600 μm; C, F, 300 μm; B , 120 μm; B , D , 60 μm; A , 30 μm; B , 20 μm.