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Lecithoepitheliata : ウィキペディア英語版 | Lecithoepitheliata
The Lecithoepitheliata are an order of turbellarian flatworms. They are free-living worms, found in both freshwater and marine environments. They are distinguished from other flatworms by the presence of four nerve cords and the fact that the ovary forms a single structure that both produces the ovum and nourishing yolk cells. In most other flatworms, yolk cells, where present at all, are typically formed in a gland derived from the ovary, but separate from it. Other diagnostic features of this order include the presence of a sharp stylet on the end of the penis, and a simple, unbranched, intestine. == References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Lecithoepitheliata」の詳細全文を読む
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