Figure 2. Scolelepis larval morphology. A, 25 in Origin of the pointed snout in Scolelepis and the mouth region in spionid polychaetes (Annelida: Spionidae)

Figure 2. Scolelepis larval morphology. A, 25-chaetiger larva of Scolelepis sp., leħ lateral view. B, anterior end, leħ lateral view. C, D, same, dorsal view. E, same, ventral view. F, same, fronto-ventral view. Abbreviations: br, provisional serrated bristles; ca, caruncle; cp, ciliated pit; ga, gastrotrochs; lp, lateral peristomial lip; mo, mouth; ne, neurotroch; nu, nuchal organ; pa, palp; pp, medioventral peristomial process; pr, prostomium; pt, prototroch, py, pygidium; te, telotroch. Scale bars: A, C, E, F, 100 µm; B, D, 50 µm. A–F, Carrie Bow Cay, Belize, Caribbean Sea (USNM 1459502).