Fig. 6 in Early-middle Cambrian stratigraphy and faunas from northern Siberia

Fig. 6. Lingulid brachiopod Eoobolus variabilis (Pelman, 1977) from the middle Cambrian Kuonamka Formation, Bol'shaya Kuonamka River, Siberia, Russia, sample 8/23.1. A, B, D. Dorsal valves, SMNH Br151184–151186, respectively. A2, A3, close-ups of tuberculate surface. C. Ventral valve, SMNH Br151187. E, F. Specimens with both valves preserved, view on the ventral valve, SMNH Br151188 and 151189, respectively. Scale bar: 1 mm (A1, B–F), 250 µm (A3), 50 µm (A2).图6 产自俄罗斯西伯利亚大库奥纳姆卡河（Bol'shaya Kuonamka River）中寒武统库奥纳姆卡组（Kuonamka Formation）的舌形贝型腕足类（Lingulid brachiopod）变古无孔贝（Eoobolus variabilis，Pelman, 1977），样品编号为8/23.1。其中A、B、D依次为背壳（dorsal valve），对应标本登记号分别为SMNH Br151184至151186；A2、A3为其瘤状表面的局部放大图。C为腹壳（ventral valve），标本登记号为SMNH Br151187。E、F分别为双壳保存的标本，视角为腹视，对应标本登记号分别为SMNH Br151188与151189。比例尺：1 mm（适用于A1、B–F），250 µm（适用于A3），50 µm（适用于A2）。