Fig. 7 in Echinoderes blazeji Grzelak & Sørensen 2022, sp. nov.

Fig. 7. Organogenesis of embryonic development of Sepia pharaonis illustrating the adult body plan. (A) Orientation of the embryo (st. 17) proceeding to organogenesis was already clear and determined. Scale bar: 2 mm. (B) Top view of the animal pole of the embryo in A (red arrow) depicts the upper portion is dorsal (Do) to the embryo and the lower portion is ventral (Ve). The perpendicular axis to the yolk sac facing our view is posterior (P) and the opposite side is anterior (A). I-IV: arm I-IV; A: anterior; An: anus; Ch: cheek pump; Do: dorsal; Os: optic sac; Fu: funnel; Gi: gill; L: left; Ma: mantle; Mo: mouth; P: posterior; R: right; Ss: shell sac; St: statocyst; st: stage; Te: tentacle. Scale bar = 400 nm.