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Fig. 1. (A) Swimming larva of Ciona intestinalis. In the trunk the two
pigmented organs are visible within the sensory vesicle. Scale bar, 100 µm.
(B) Diagram of motor neurons of the visceral ganglion and of the innervation
pattern of muscle cells in the tail, dorsal view (modified from
Bone, 1992;
Cole and Meinertzhagen, 2004;
Brown et al., 2005). Neurites
connecting motor neurons to the muscle cells in the tail present some
varicosities (arrow). ap, adhesive papillae; mc, muscle cell; mn, motor
neurons; ne, neurites; N, neck; NT, neural tube; oc, ocellus; ot, otolith; SV,
sensory vesicle; tr, trunk; t, tail; VG, visceral ganglion).