Figure 9
The cephalic structure of some Nassellaria according to W. Riedel.
I, II) Anthocyrtidium cineraria, laterally and anteriorly.
l, lateral furrows; r, ribs of thorax (according to Riedel, 1957b); III) Antarctissa (=Helotholus); IV) Lithamphora furcaspiculata (=Siphocampium sp.); Ax, axostyle.
All other designations same as in fig. 8 (according to Riedel, 1958)
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