Figure 1. Xianguangia sinica with tentacle-sheath complexes closed. A, B in Tentacular nature of the 'column' of the Cambrian diploblastic Xianguangia sinica

Figure 1. Xianguangia sinica with tentacle-sheath complexes closed. A, B, laterally preserved specimen: A, YKLP 13478a, part; B, YKLP 13478b, counterpart. C, a close-up image showing the outer sheaths, tentacle rods and pinnules. D, interpretative drawing of C. E, YKLP 13829a, the preservation of the whole body suggests light sclerotization. F, a fluorescent image of the distal tentacle region, showing pinnules fringed on the distal tentacles. Abbreviations: Cal, calyx; Cc, circumferential constriction; Ds, dark stain; Dt, distal tentacle; Os, outer sheath; Pin, pinnule; Ter, tentacle rod; T1–T8, tentacle-sheath complex 1 to 8. Scale bars: A, B, E = 5 mm; C, F = 1 mm.