OBSERVATIONS ON FEEDING METHODS IN SOME FLORIDA ASCOGLOSSANS
OBSERVATIONS ON FEEDING METHODS IN SOME FLORIDA ASCOGLOSSANS
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佛罗里达州部分 ASCOGlossans 饲养方法的观察
DOI：
10.1093/oxfordjournals.mollus.a065567
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发表时间：
1981
影响因子：
1.2
通讯作者：
K. Jensen
中科院分区：
文献类型：
--
作者：
K. Jensen
饲养方法描述了12个佛罗里达子囊。分析了齿舌的大小和形状与饵料藻类的大小之间的关系。首次描述了一种食草物种（Eylsia evelinae）的摄食。从子囊泡的吸食性、齿舌和消化系统的结构来看，它是一种囊舌动物，而不是头虫。在Oxynoespp非常复杂的喂养方法。被认为是进化的“死胡同”，消化腺的分支和咽附件的位置似乎表明Elysiidae不是从Oxynoidae进化而来的。对Elysia ornata、普拉西亚kingstoni和Ercolania funeras摄食的新的详细观察表明，细胞液被吸入咽部后，又返回藻丝。这个过程可能会重复一次或两次，然后细胞液最终被泵入胃中。细胞液可能在咽部与唾液混合以降低其粘度，并且咽部回流促进剩余液的排出。
Feeding methods are described for 12 Florida ascoglossans. Relationships between size and shape of radular teethand dimensions of food algae are analysed. Feeding in a diatom-eating species (Eylsia evelinae) is described for the first time. The suctorial feeding ofAscobulla ullaand the structure of its radula and alimentary system clearly reveal that it is an ascoglossan, not a cephalaspid. The very complicated method of feeding inOxynoespp. is considered an evolutionary “dead end”, and the branching of the digestive gland and position of pharyngeal appendices seem to indicate that the Elysiidae did not evolve from the Oxynoidae. New and detailed observations on feeding inElysia ornata, Placida kingstoni, andErcolania funereashow that after cell sap has been sucked into the pharynx, it is returned to the algal filament. This process may be repeated once or twice before the cell sap is eventually pumped into the stomach. Cell sap is probably mixed with saliva in the pharynx to reduce its viscosity, and the pharyngeal regurgitation facilitates withdrawal of the remaining sap.