Fig. 1
From: Ancestral morphology of Ecdysozoa constrained by an early Cambrian stem group ecdysozoan
RCCBYU 10233 Acosmia maotiania in lateral orientation. a Polarized light photograph. b Digitised Camera Lucida. c Close up of the oral and pharyngeal morphology, showing the mouth, lip, and pharyngeal ridges connecting to the associated elements in the anterior portion of the pharynx. Black triangles indicate possible oral spines. d Close up of the posterior trunk cuticle, showing posterior papillae and infilled gut. an annulations, ap anterior papillae, g gut, l lip, pe pharyngeal elements, phx pharynx, pp posterior papillae, pr pharyngeal ridges, sc sclerotized tissue, si sediment infill, tm terminal mouth. Extent of the gut (pink) and pharynx (red) highlighted