{"ops":[{"insert":" 双边这类对我还是有点抽象，英语不好，仅供参考。 \n Alycaeidae科有11个属，分布范围西到印度东到日本，北到韩国，南到印度尼西亚。Boucardicus属为马达加斯加特有属。\n 该科亚洲种类的特点是从壳口边缘后的缢缩部分之后着生一条封闭的"},{"attributes":{"color":"#ffb027"},"insert":"呼吸管"},{"insert":"，并依随于缝合线向后延伸。呼吸管连接数个狭窄的垂直的"},{"attributes":{"color":"#ffb027"},"insert":"呼吸道"},{"insert":"，这些呼吸道开孔于脐孔外部，由壳体表层褶皱形成。\n "},{"attributes":{"color":"#f85a54"},"insert":"如果我没理解错，彩图中绿圈部分细密的螺纹就是壳体表层褶皱形成的呼吸道。"},{"insert":"\n"},{"attributes":{"color":"#f85a54"},"insert":" 红圈为呼吸管"},{"insert":"\n\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b2.sanwen.net/b_article/38bc4c4ed0bdd08afaef7bb9ccca912e78732d51.jpg","width":668,"height":607,"size":217039,"status":"loaded"}}},{"insert":"\n电镜下的细节图……cd是横截面（大概）\n\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b2.sanwen.net/b_article/526834004f7100a7c4e291923610fd5f2c2003cf.jpg","width":679,"height":465,"size":199642,"status":"loaded"}}},{"attributes":{"color":"#ffb027"},"insert":"整个壳体除胚螺层外可分为几部分"},{"insert":"：\n"},{"attributes":{"color":"#f85a54"},"insert":"R1"},{"insert":"（红色）胚螺层结束部分到肋纹发生变化的区域之前。\n"},{"attributes":{"color":"#2ac864"},"insert":"R2"},{"insert":"（绿色）肋纹发生变化的区域。\n"},{"attributes":{"color":"#00aeec"},"insert":"R3"},{"attributes":{"color":"#18191c"},"insert":"（蓝色）从缢缩部到壳口。"},{"insert":"\n\n"},{"attributes":{"class":"normal-img"},"insert":{"native-image":{"alt":"read-normal-img","url":"https://b2.sanwen.net/b_article/c026064c45f153d6bc997186037ae2617953d1f2.jpg","width":689,"height":259,"size":97115,"status":"loaded"}}},{"insert":"\n"},{"attributes":{"color":"#ffb027"},"insert":"中国、中国台湾省、越南的Alycaeidae蜗牛可以分为5组"},{"insert":"\n"},{"attributes":{"color":"#00aeec"},"insert":"1.Dioryx属（沟螺）壳体球形，胚螺层光滑，R2光滑，缢缩部短，R3难以辨别。"},{"insert":"\n"},{"attributes":{"color":"#f85a54"},"insert":"2.Alycaeus属 壳体锥形，体螺层宽，脐孔宽，胚螺层光滑，R2很短。"},{"insert":"\n"},{"attributes":{"color":"#2ac864"},"insert":"3.Pincerna属（平沟螺）壳体圆锥球形，中等的体螺层，狭窄或关闭的脐孔，光滑或稍微褶皱的胚螺层，R2短或中等长度。"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"4和5包括Chamalycaeus属和Dicharax 属"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"4.通常壳体螺旋部低，胚螺层低且无螺纹，成体螺层无螺纹，R2短或非常长，通常带肋，且弯曲向壳口。"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"5.壳体上升平坦，壳体螺旋部低但胚螺层高，有螺纹，R2短到长，肋直且锋利，间距宽。"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"Chamalycaeus属模式种胚螺层光滑，成体螺层具螺旋线，从中排除胚螺层具螺纹且上升的物种，且命名为Metalycaeus属."},{"insert":"\n"}]}
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