Figure 6From: Origin and evolutionary plasticity of the gastric caecum in sea urchins (Echinodermata: Echinoidea)Digestive tract anatomy of selected irregular sea urchin taxa (Echinoneidae - Arachnoididae). Echinoneidae (A), Apatopygidae (B), Cassidulidae (C), Neolampadidae (D), Clypeasteridae (E, F), and Arachnoididae (G = juvenile specimen, H = adult specimen). AB = aboral view, LA = lateral view, OR = oral view. e = esophagus, p = pouch. Not to scale.Back to article page