Laval development of the Megabalanine Balanomorph Austromegabalanus nigrescens (Lamarck) (Cirripedia, Balanidae)

摘要: The presence of embryos in the mantle cavity A. nigrescens was monitored over a 2-year period. A, maintains some breeding individuals throughout year but shows peak during late autumn, winter and early spring vicinity Sydney, New South Wales, Australia. larval stages are described from larvae reared laboratory. can be easily distinguished other nauplii balanomorphs Wales by their distinctive marginal spines paired dorsal shield spines. duration development nigrescens, 13-23 days, is similar to that Australian balanids does not appear accord with concept distribution Austromegabalanus species has involved long-range epiplanktonic dispersal. separation Austromegabaianus, Notomegabalanus Megabalanus supported larva! differences.