Extended Data Fig. 4: Deuterostomes from the Castle Bank fauna.
From: A Middle Ordovician Burgess Shale-type fauna from Castle Bank, Wales (UK)
a–c, dendroid graptolite Dictyonema sp. with zooids (NMW.2021.3 G.40); a, cross-polarized light to highlight tubarium; b, plane-polarized light, with dark spots being zooids within thecae; c, detail of zooid (boxed in b) with evidence for cephalic shield (cs) and lophophore (loph) (NMW.2021.3 G.41); d, multi-branched benthic graptolite (NMW.2021.3 G.43); e–g, overall view (with interpretative drawing, f) and detail of body region of hemichordate with lophophore (loph) of two main tentacles and short lateral projections, fusellar-banded tube (tub), and reticulate holdfast region (ho) (NMW.2021.3 G.44); h, pair of Dendrocystites-like solutans from uncertain level (NMW.2021.3 G.45); i, undescribed asterozoan (NMW.2021.3 G.67); j, conodont (NMW.2021.3 G.95); k, bedding plane assemblage of conodonts (NMW.2021.3 G.96). Scale bars 1 mm (except c and k: 0.5 mm).
