Abstract
Abstract Larvae of the common intertidal chthamalid barnacles Jehlius cirratus and Notochthamalus scabrosus were obtained from mature adults collected in central and northern Chile and cultivated in the laboratory at temperatures typical of the conditions encountered by larvae in these regions. Morphological and developmental descriptions of the six naupliar stages and the cyprid stage of both species are given. Both species clearly present the general pattern of development for chthamalids, in which the structural characters of the cephalic shield and abdominal process, in conjunction with the utilization of the alphabetical setation formula for antennae, facilitate the identification and differentiation between larval stages. The average time of naupliar larval development of J. cirratus and N. scabrosus in sea-water temperature ranging 15–18°C was 31 and 37 days, while larvae cultivated in temperatures ranging 18–20°C completed naupliar development after 13 and 20.2 days, respectively. This represents ...
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