Figure 2. Xianguangia sinica with tentacle-sheath complexes splayed out. A, YKLP 13496a in Tentacular nature of the 'column' of the Cambrian diploblastic Xianguangia sinica

Figure 2. Xianguangia sinica with tentacle-sheath complexes splayed out. A, YKLP 13496a, part, showing a displaced calyx and tentacle-sheath complexes. B, YKLP 13496b, counterpart, preserved with discrete tentacle-sheath complexes. C, a merged image of part and counterpart, showing a complete morphology of the body. D, YKLP 13477a, part, a specimen in oral-aboral view showing a total of 18 tentacle-sheath complexes. E, close-up of the tentacle-sheath complexes T10–T11, showing the smooth outer sheaths and relief tentacle rods with rows of paired dark stains. F, a fluorescent image showing the details of dark stains along the tentacles. G, interpretative drawing of F. Abbreviations: Cal, calyx; Ds, dark stain; Fu, furrow; T1–T18, tentacle-sheath complex 1 to 18. Scale bars: A–D = 5 mm; E–G = 2 mm.