Fig. 5

Myogenesis in Dinophilus taeniatus. Phalloidin-labelled actin-filaments shown in green, animals are oriented with the anterior end up (a-d, f-k) or to the left (e). 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-c embryonic development: a ventral view of an early embryo (5–6 days after eggs are deposited), b ventral view of a middle embryo (7–9 days after eggs are deposited), c ventral view of a prehatching embryo (10–14 days after eggs are deposited), d ventral view of an early juvenile animal, e-k adult worm: e ventrolateral view of the overall bodywall musculature, f detail of the head musculature in ventral view, g ventrolateral view of the body wall musculature in the trunk, h dorsolateral view of a virtually cropped stack of the caudal region of the body (arrowheads point at thin bundles of longitudinal muscles), i ventral view of the head (arrowhead points at basket-shaped musculature of the pharynx), j lateral view of the musculature in the digestive system in the posterior part of the body, k dorsal view of the copulatory organ and seminal receptacle. Abbreviations: alps – anterior loop of the penile sheath, an – anus, cm – circular muscle, cmds – circular muscle of the digestive system, cmps – circular muscles of the penile sheath, dlca – contralatero-anterior branch of the dorsolateral longitudinal muscle, dldb – dorsal branch of the dorsolateral longitudinal muscle, dlia – ipsilatero-anterior branch of the dorsolateral longitudinal muscle, dllm – dorsolateral longitudinal muscle, dlvb – ventral branch of the dorsolateral longitudinal muscle, dm – diagonal muscle, dsvp – muscular duct leading from the seminal receptacles to the penis, fmt – foregut-midgut transition, gpr – gonopore opening, lips – longitudinal inner muscles of the penile sheath, lm – longitudinal muscle, lmds – longitudinal muscle of the digestive system, lops – longitudinal muscles of the penile sheath, mo – mouth opening, mrmo – muscular ring around the mouth opening, np – neuropil, phb – pharyngeal bulb, phm – pharyngeal muscle, pyg – pygidium, sv – seminal vesicle, vca –contralatero-anterior branch of the ventral longitudinal muscle, vcb- – contralateral dorsal branch of the ventral longitudinal muscle, vlca – contralatero-anterior branch of the ventrolateral longitudinal muscle, vlcb – contralateral branch of the ventrolateral longitudinal muscle, vldb – dorsal branch of the ventrolateral longitudinal muscle, vlia – anterior ipsilaterial branch of the ventrolateral longitudinal muscle, vlib – ipsilatero-anterior branch of the ventrolateral longitudinal muscle, vllm – ventrolateral longitudinal muscle, vlm – ventral longitudinal muscle, vlvb – ventral branch of the ventrolateral longitudinal muscle