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Larval Development of the Barnacle, Microeuraphia Withersi (Cirripedia, Thoracica, Chthamalidae) Reared in the Laboratory

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[The larvae of Microeuraphia withersi cultured in our laboratory passed through six naupliar stages and a cypris stage. Morphological characters including the cephalic shield, frontolateral horns, labrum, hind body, antennules, antennae, and mandibles in all naupliar stages are described and illustrated based on observation by compound light microscope and scanning electron microscope (SEM). The larvae from different stages can easily be distinguished by their distinct diagnostic features in each stage. The ultrastructure of the frontolateral horns, cephalic shield, and hind body of the nauplii, also the head shield, lattice organs, and antennules of the cyprid, are shown for the first time with SEM images. In the present study, differences in morphological description were found with those in the previous studies. Comparison of the larval morphological characters in the chthamalid species, Microeuraphia withersi, Chthamalus malayensis, C. challengeri, Pseudoctomeris sulcata, and Chinochthamalus scutelliformis, showed that some morphological characters can be similar in the nauplii and/or cyprids of these species. Les larves de Microeuraphia withersi élevées dans notre laboratoire passent par six stades nauplius et un stade cypris. Des caractères morphologiques incluant le bouclier céphalothoracique, les cornes fronto-latérales, le labrum, l'arrière du corps, les antennules, antennes et mandibules chez tous les stades nauplius sont décrits et illustrés à partir d'observation par microscopie classique et microscopie électronique à balayage. Les larves des différents stages sont facilement distinguables grâce à des caractères distincts permettant le diagnostic de chaque stade. L'ultrastructure des cornes fronto-latérales, du bouclier céphalique et de l'arrière du corps des nauplii, mais aussi du bouclier céphalique, organe dorsal et antennules des cypris, sont montrés pour la première fois avec des images par balayage. Dans cette étude, des différences morphologiques par rapports aux descriptions antérieures ont été trouvées. La comparaison des caractères morphologiques larvaires des espèces de chthamalidés Microeuraphia withersi, Chthamalus malayensis, C. challengeri, Pseudoctomeris sulcata, et Chinochthamalus scutelliformis, montrent que certains caractères morphologiques peuvent être semblables chez les nauplii et/ou les cypris de ces espèces., The larvae of Microeuraphia withersi cultured in our laboratory passed through six naupliar stages and a cypris stage. Morphological characters including the cephalic shield, frontolateral horns, labrum, hind body, antennules, antennae, and mandibles in all naupliar stages are described and illustrated based on observation by compound light microscope and scanning electron microscope (SEM). The larvae from different stages can easily be distinguished by their distinct diagnostic features in each stage. The ultrastructure of the frontolateral horns, cephalic shield, and hind body of the nauplii, also the head shield, lattice organs, and antennules of the cyprid, are shown for the first time with SEM images. In the present study, differences in morphological description were found with those in the previous studies. Comparison of the larval morphological characters in the chthamalid species, Microeuraphia withersi, Chthamalus malayensis, C. challengeri, Pseudoctomeris sulcata, and Chinochthamalus scutelliformis, showed that some morphological characters can be similar in the nauplii and/or cyprids of these species. Les larves de Microeuraphia withersi élevées dans notre laboratoire passent par six stades nauplius et un stade cypris. Des caractères morphologiques incluant le bouclier céphalothoracique, les cornes fronto-latérales, le labrum, l'arrière du corps, les antennules, antennes et mandibules chez tous les stades nauplius sont décrits et illustrés à partir d'observation par microscopie classique et microscopie électronique à balayage. Les larves des différents stages sont facilement distinguables grâce à des caractères distincts permettant le diagnostic de chaque stade. L'ultrastructure des cornes fronto-latérales, du bouclier céphalique et de l'arrière du corps des nauplii, mais aussi du bouclier céphalique, organe dorsal et antennules des cypris, sont montrés pour la première fois avec des images par balayage. Dans cette étude, des différences morphologiques par rapports aux descriptions antérieures ont été trouvées. La comparaison des caractères morphologiques larvaires des espèces de chthamalidés Microeuraphia withersi, Chthamalus malayensis, C. challengeri, Pseudoctomeris sulcata, et Chinochthamalus scutelliformis, montrent que certains caractères morphologiques peuvent être semblables chez les nauplii et/ou les cypris de ces espèces.]

Affiliations: 1: Key Laboratory of Marine Bio-resources Sustainable Utilization (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China, Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; 2: School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, China;, Email: miaosy@mail.sysu.edu.cn; 3: Key Laboratory of Marine Bio-resources Sustainable Utilization (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, China

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/content/journals/10.1163/001121610x551863
2011-02-01
2016-12-03

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