Fig. 9.

Development of external ciliation patterns in Dinophilus taeniatus. Acetylated α-tubulin-like immunoreactive filaments shown in white, animals are oriented with the anterior end up (a-e) or to the left (f). Stages are indicated by silhouettes next to the figure capture, and the assignment to the respective stage next to them. The first signs of difference between the two species D. gyrociliatus and D. taeniatus are emphasized by a yellow dashed-lined frame around the picture. a-d embryonic development: a ventral view of an early embryo (5–6 days after eggs have been deposited), b ventral view of embryo at ventral ciliary field stage, c ventral view of a late embryo with the onsets of the developing ciliary bands 1, 3, 5, 7, and 9, d ventral view of a prehatching embryo with well developed external ciliation, e ventral view of an early juvenile specimen before duplication of the ciliary bands, f lateral view of an adult specimen, with well-developed duplication of ciliary bands. Abbreviations: an – anus, cb1-12 – ciliary band 1–12, cch – compound cilia of the head, lcf – lateral ciliary field, mo – mouth opening, pyg – pygidium, vcf – ventral ciliary field