Figure 16
Structure of the sagittal ring (original).
I) Zygocircus capulosus (plankton, Pacific Ocean); II) Z. productus (plankton, Pacific Ocean); III) Semantis sp. (Eocene, DODO 123); IV) species close to Semantis sp. (Eocene, California, local. 1785); V) species close to Semantis sp. (Miocene, AMPH 6P); VI) Acanthodesmia (=Semantis) micropora (surface sediment, Antarctic); VII) Lithocircus (=Archicircus) primordialis (plankton, Pacific Ocean); VIII) L. annularis (surface sediment, Mediterranean Sea); IX) Semantis (?) sp. (Upper Oligocene, JYN V, 16P); X) species close to Semantis (?) sp. (Middle Miocene, AMPH 6P); XI) similar species from the same sample. For other designations see text. |
