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animal
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Wide ear Bian Yu Lo
宽耳扁玉螺
拉丁文学名:sinum cymba
命名者:menke
英文名称:boat ear moon
贝类动物、腹足纲、玉螺超科、玉螺科
分布:美国西北部、加拉帕格斯群岛
数量:常见
尺寸:5厘米
壳薄而轻,螺塔低,体层丰满,壳底构成棱角,缝合线随着螺层的生长由浅变深。壳口极宽,与大多数玉螺相反,外唇薄,在螺轴处无滑层连接。各螺层由细螺沟盘绕。早期螺层表面呈紫褐色,体层微浅褐色,壳口为深咖啡色。