Fig. 14.

Comparative neurogenesis and development of ciliary patterns in Dinophilus. The acetylated α-tubulin-like immunoreactive structures are colour coded (ciliary bands and the ventral ciliary filed in light grey, the acetylated α-tubulin-like immunoreactive nervous system in dark grey, glandular structures (=pharyngeal glands, flask-shaped gland cells and ciliary band glands) in light blue, nephridia in dark purple); female Dinophilus gyrociliatus are depicted on the left hand, females of D. taeniatus on the right hand. Stages are indicated by silhouettes next to the figure capture (also indicating the size difference at this stage between the two species D. gyrociliatus in white and D. taeniatus in orange), and the assignment to the respective stage next to them. The first signs of difference between the two species are emphasized by a yellow dashed-lined frame around the picture. a Early embryo (3 days in D. gyrociliatus or 7–9 days in D. taeniatus after the eggs are deposited, respectively), b late embryo (5–5.5 or 12–14 days after the eggs are deposited, respectively), c prehatching females (5.5 or 13–20 days after the eggs have been deposited, respectively), d early juveniles, e adult females (older than 14 days or several weeks after the eggs are deposited, respectively). Abbreviations: acom – anterior commissure, an – anus, br – brain, cb1-14 – ciliary band 1–14, cbg – ciliary band gland, cch – compound cilia of the head, cec – circumesophageal connective, cmvn – circumesophageal connective forming the medioventral nerve, com 1–5 – commissure 1–5, cvlc – circumesophageal connective forming ventrolateral nerve cord, ds – digestive system, e – eye, fsc – flask-shaped cells, lcf – lateral ciliary field, lpn – longitudinal peripheral nerve, mcom – median commissure (= only commissure in D. taeniatus posthatching and adult stages), mo – mouth opening, mvn – medioventral nerve, n1-6 – nephridium 1–6, nacb – lateral nerve anterior to the ciliary band, nar – nerves innervating the anterior rim, nis – intersegmental lateral nerve, nlcf – nerve innervating the lateral ciliary field, np – neuropil, npcb – lateral nerve posterior to the ciliary band, pcom – posterior commissure, pmvn – paramedioventral nerve, pyg – pygidium, stnr – stomatogastric nerve ring, tcom – terminal commissure, vcf – ventral ciliary field, vlnc – ventrolateral nerve cord