Figure 3From: Origin and evolutionary plasticity of the gastric caecum in sea urchins (Echinodermata: Echinoidea)Digestive tract anatomy of selected "regular" sea urchin taxa (Histocidaridae - Aspidodiadematidae). Histocidaridae (A), Cidaridae (B, C), Phormosomatidae (D), Echinothuriidae (E-G), Pedinidae (H, I), Micropygidae (J), and Aspidodiadematidae (K, L). AB = aboral view, OR = oral view. d = dilation, e = esophagus, f = festoon. Not to scale.Back to article page