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LARVAL DEVELOPMENT OF MEMBRANOBALANUS KOREANUS KIM & KIM, 1983, REARED IN THE LABORATORY (CIRRIPEDIA, THORACICA)

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Membranobalanus koreanus is a sponge barnacle inhabiting the pumpkin-coloured sponge, Cliona celata, which is attached to rocky bottoms. The larval morphology is described and illustrated for the first time from larvae reared in the laboratory. Size and setation formulae are given for each larval stage. Total length, shield width, setal type of the 4th segment of the antennal endopodite, morphology of the labrum, and cephalic shield spine in stages IV-VI, and setation involving the number, relative location, and types of setae on appendages such as antennule, antenna and mandible would be useful in the identification of the barnacle larvae. In addition to the above morphological features, patterns and number of the thoracic spines are found to be useful in both the intraspecific and interspecific identification of barnacle larvae. Morphological differences between the larvae of M. koreanus and Acasta spongites, both inhabiting the sponges, are minor.

Membranobalanus koreanus est une balane spongicole habitant Cliona celata, éponge fixée sur des fonds rocheux. La morphologie larvaire est décrite pour la première fois d’après des larves élevées en laboratoire. La taille et les formules sétales sont données pour chaque stade. La longueur totale, la largeur du bouclier, le type sétal du 4ème article de l’endopodite antennaire, la morphologie du labrum et l’épine du bouclier céphalique aux stades IV-VI, ainsi que la sétation, avec le nombre, la position relative et les types de soies sur des appendices tels que l’antennule, l’antenne et la mandibule peuvent être utiles dans l’identification des larves de balanes. En plus des traits morphologiques ci-dessus, la disposition et le nombre des épines thoraciques sont utilisés dans l’identification intra- et interspécifique de ces larves. Les différences morphologiques entre les larves de M. koreanus et d’ Acasta spongites, habitant l’un et l’autre ces éponges, sont mineures.

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/content/journals/10.1163/156854000504480
2000-04-01
2015-01-27

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