Skip to main content
. 2010 Jul 5;1:2. doi: 10.1186/2041-9139-1-2

Figure 1.

Figure 1

Early stages of larval gut development in Chaetopterus. (A) Lateral view schematics with anterior to the top and ventral to the left. Gut formation and regionalization in larval stages at 15 hours, L1 (18 to 36 hours), L2 (36 to 72 hours) and L3 (3 to 30 days). (B-I) DIC micrographs of larval stages corresponding to schematics in (A). (B, C, D, F, H) Lateral views with anterior to the top and ventral left; (E, G, I) ventral views with anterior to the top. an, anus; at, apical tuft; en, endoderm; hc, head coelom; hg, hindgut; lb, lateral bristle; lc, lateral hooked cilia; lo, larval ocellus; mg, midgut; mt, mesotroch; pyg, pygidium; st, stomodeum; tc, trunk coelom. Scale bars = 50 μm. Larval schematics modified from Irvine et al. [40].