{"ops":[{"insert":" 雙邊這類對我還是有點(diǎn)抽象，英語不好，僅供參考。 \n Alycaeidae科有11個屬，分布范圍西到印度東到日本，北到韓國，南到印度尼西亞。Boucardicus屬為馬達(dá)加斯加特有屬。\n 該科亞洲種類的特點(diǎn)是從殼口邊緣后的縊縮部分之后著生一條封閉的"},{"attributes":{"color":"#ffb027"},"insert":"呼吸管"},{"insert":"，并依隨于縫合線向后延伸。呼吸管連接數(shù)個狹窄的垂直的"},{"attributes":{"color":"#ffb027"},"insert":"呼吸道"},{"insert":"，這些呼吸道開孔于臍孔外部，由殼體表層褶皺形成。\n "},{"attributes":{"color":"#f85a54"},"insert":"如果我沒理解錯，彩圖中綠圈部分細(xì)密的螺紋就是殼體表層褶皺形成的呼吸道。"},{"insert":"\n"},{"attributes":{"color":"#f85a54"},"insert":" 紅圈為呼吸管"},{"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電鏡下的細(xì)節(jié)圖……cd是橫截面（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":"整個殼體除胚螺層外可分為幾部分"},{"insert":"：\n"},{"attributes":{"color":"#f85a54"},"insert":"R1"},{"insert":"（紅色）胚螺層結(jié)束部分到肋紋發(fā)生變化的區(qū)域之前。\n"},{"attributes":{"color":"#2ac864"},"insert":"R2"},{"insert":"（綠色）肋紋發(fā)生變化的區(qū)域。\n"},{"attributes":{"color":"#00aeec"},"insert":"R3"},{"attributes":{"color":"#18191c"},"insert":"（藍(lán)色）從縊縮部到殼口。"},{"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":"中國、中國臺灣省、越南的Alycaeidae蝸?？梢苑譃?組"},{"insert":"\n"},{"attributes":{"color":"#00aeec"},"insert":"1.Dioryx屬（溝螺）殼體球形，胚螺層光滑，R2光滑，縊縮部短，R3難以辨別。"},{"insert":"\n"},{"attributes":{"color":"#f85a54"},"insert":"2.Alycaeus屬 殼體錐形，體螺層寬，臍孔寬，胚螺層光滑，R2很短。"},{"insert":"\n"},{"attributes":{"color":"#2ac864"},"insert":"3.Pincerna屬（平溝螺）殼體圓錐球形，中等的體螺層，狹窄或關(guān)閉的臍孔，光滑或稍微褶皺的胚螺層，R2短或中等長度。"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"4和5包括Chamalycaeus屬和Dicharax 屬"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"4.通常殼體螺旋部低，胚螺層低且無螺紋，成體螺層無螺紋，R2短或非常長，通常帶肋，且彎曲向殼口。"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"5.殼體上升平坦，殼體螺旋部低但胚螺層高，有螺紋，R2短到長，肋直且鋒利，間距寬。"},{"insert":"\n"},{"attributes":{"color":"#ff6699"},"insert":"Chamalycaeus屬模式種胚螺層光滑，成體螺層具螺旋線，從中排除胚螺層具螺紋且上升的物種，且命名為Metalycaeus屬."},{"insert":"\n"}]}