Figure 8
From: Origin and evolutionary plasticity of the gastric caecum in sea urchins (Echinodermata: Echinoidea)
Digestive tract anatomy of selected irregular sea urchin taxa (Corystidae - Spatangidae). Corystidae (A), Urechinidae (B-D), Pourtalesiidae (E, F), Aeropsidae (G), Hemiasteridae (H), Schizasteridae (I), Brissidae (J, K), Brissopsidae (L), Loveniidae (M), Spatangidae (N, O), and Asterostomatidae (P). (K) from [67, Fig. 11] - reproduced in modified form with kind permission from the Rosenstiel School of Marine and Atmospheric Science. AB = aboral view, LA = lateral view, OR = oral view. e = esophagus, p = pouch. Not to scale.