Fig. 5 in Palaeobiology of orthothecide hyoliths from the Cambrian Manto Formation of Hebei Province, North China

Fig. 5. Internal moulds of decollated segments of cupithecid hyolith Cupitheca convexa sp. nov. from the Manto Formation (Cambrian Stage 4/5) in the Zuojiawu section of Tangshan, China. A. NIGPAS 166334, discarded apical segments with smooth surface (A1–A3, A6); bottom of the apex (A4); apical bottom covered with radial sculptures (A5); discarded segment preserves faint transverse lines on the surface of conch (A7). B. NIGPAS 166343, decollated segment displaying apical bottom, probable diagenetic artefacts on the bottom of apex (B1); branching ornamentation on the bottom of apex (B2). C. NIGPAS 166339a, decollated segments two segments preserved together the left one exhibits pits and longitudinal groove structures on the surface of terminal part (C1); detail C2); discarded apical segments with smooth surface (C3). Scale bars: A1, A3, A6, A7, B1, C3, 100 μm; A2, A4, 50 μm; C1, 200 μm; A5, B2, C2, 20 μm.