其中包括现生属萝卜螺(Radix)、圆扁卷螺(Hippeutis)及近于现生属椎实螺(Lymnaea) 的小隐螺(Adelinella)、似天鹅绒螺(Velutinopsis)的种类。
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Lymnaea stagnalis 静水椎实螺
Lymnaea auricularia 胞蚴和尾蚴在萝卜螺 ; 耳萝布螺
lymnaea swinhoei 椭圆萝卜螺 ; 斯温和氏椎实螺
lymnaea ovata 卵圆萝卜螺
Lymnaea hookeri 霍氏椎实螺
Lymnaea pervia 有孔椎突螺
lymnaea cubensis 古巴椎实螺
lymnaea plicatula 折叠锥实螺
In the case of Lymnaea peregra, studies indicate that a dextral gene is expressed during egg formation.
在锥实螺的例子中,研究表明右旋基因是在卵的形成期表达的。
In the case of Lymnaea peregra, studies indicate that a dextral gene is expressed during egg formation;
在锥实螺的例子中,研究表明右旋基因是在卵的形成期表达的;
However there is one species of pond snail, Lymnaea stagnalis, which demonstrates examples of both clockwise or anticlockwise spiralling shells.
然而,有一种叫做“静水椎实螺”的田螺,它是同时拥有顺时针和逆时针螺壳的典型代表。
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