Fig. 3

Confocal microscope images of a Schizocardium karankawa A tornaria larva with apical tuft, telotroch, and anal sphincter muscles. This larval stage is directly comparable to Fig. 1K. B Dorsal view of a juvenile worm with distinct proboscis, collar, and trunk. C Left lateral view of a 4-gill pore stage juvenile worm with long proboscis, mouth, collar, and trunk. af anal field, ap apical tuft, an anus, as apical strand, asm anal sphincter muscles, c collar, gp gill pore, i intestine, m mouth, mc muscles of the metacoels, om oesophogeal muscles, pc pericardial sac, pr proboscis, t trunk, tm trunk muscle, tt telotroch. Scale bars = 200 \(\mathrm{\mu m}\)