| Modes of larval dispersal at hydrothermal vent sites (21 degree N, 13 degree N and the Galapagos Rift) have been inferred for mollusks from the morphology of the larval shell. Only three have morphologies indicative of planktotrophic development (one mytilid and two turrids); the larval development of the remaining species appears to be nonplanktotrophic. Among the hydrothermal vent crustaceans, two (the galatheids Munidopsis cf. subsquamosa and Minidopsis lentigo ) appear to have nonplanktotrophic development, whereas both the brachyuran Bythograea thermydron and the caridean shrimp Alvinocaris lusca apparently have widely dispersing planktotrophic larval stages. Results for polychaetes suggest a similar variety of reproductive adaptations. Although a few... |
