Extended Data Fig. 5: Vermiform organisms of the Castle Bank Biota.
From: A Middle Ordovician Burgess Shale-type fauna from Castle Bank, Wales (UK)
a–c, unidentified spinose worm with complex jaw apparatus, from level A1, boxed details enlarged in b–c (NMW.2021.3 G.94); b, detail of jaw apparatus; c, anterior margin with tentacles (arrowed); d, e, probable priapulid with narrow cylindrical tube, and extruded soft body (e) (NMW.2021.3 G.97); f–h, archaeopriapulid with complex proboscis (g) showing scalids and multiple zones of pharyngeal teeth (h, labelled A–D) (NMW.2021.3 G.19); i–j, one of several species of kinorhynch-like fossils with proboscis (p), neck (n) with projecting filaments, and eleven plated trunk segments with longitudinal, projecting bristles (NMW.2021.3 G.69); k, palaeoscolecid worm with transverse rows of large plates (NMW.2021.3 G.88); l–m, palaeoscolecid with minute plates, enlarged with cross-polarization in m (NMW.2021.3 G.89). Scale bars 1 mm except for g (0.25 mm), k (0.5 mm) and m (10 μm).
