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Fig. 6 | Frontiers in Zoology

Fig. 6

From: The development and metamorphosis of the indirect developing acorn worm Schizocardium californicum (Enteropneusta: Spengelidae)

Fig. 6

Morphology of the tornaria larva of Schizocardium californicum at 26, 31 and 36 dpf. Light DIC micrographs of live larvae. All panels are anterior to the top and lateral views are ventral to the left. Optical sections through the middle of the larva (d, g-h, l) or surface views (a-c, e-f, i-k). a-d Tornaria larva at 26 dpf. d Close-up ventral view of the mesocoels and metacoels around the posterior stomach. e-h Tornaria larva at 31 dpf. Inset is a close-up of the telotroch showing pigment spots. h Close-up view of area boxed in panel g showing formation of the proboscis vesicle. i-l Tornaria larva at 36 dpf. Inset is a close-up view of the region highlighted in l, showing movement of the proboscis vesicle closer to the protocoel. as, apical strand; dv, dorsal view; i, intestine; ldl, lower dorsal lobe; ll, lateral lobe; ls, lateral saddle; lv, lateral view; m, mouth; mc, mesenchymal cell; of, oral field; pd, protocoel duct (pore canal); pdl, primary dorsal lobe; pds, primary dorsal saddle; ph, pharynx; pof, postoral field; post, postoral loop of the circumoral ciliary band; pp, protocoel pore (hydropore); pre, preoral loop of the circumoral ciliary band; ps, pigment spots; pvl, primary ventral lobe; pvs, primary ventral saddle; s, stomach; t, telotroch; v, proboscis vesicle; vs, ventral saddle; vv, ventral view. Scale bars: 400 μm (a-c, e-g, i-l), 100 μm (d, l inset), 200 μm (h)

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