<h3>雌性亲本</h3> <h3>雄谁亲本</h3> <h3>卵细胞…体内</h3> <h3>精子</h3> <h3>受精卵</h3> <h3>二细胞</h3> <h3>四细胞</h3> <h3>八细胞</h3> <h3>多细胞</h3> <h3>囊胚期</h3> <h3>担轮幼虫</h3> <h3>d形幼虫100um</h3> <h3>105um</h3> <h3>120um</h3> <h3>140um</h3> <h3>150um壳顶幼虫</h3> <h3>170um</h3> <h3>200um</h3> <h3>220um</h3> <h3>见眼点</h3> <h3>265um</h3> <h3>270um</h3> <h3>280um</h3> <h3>稚贝</h3> <h3>300um</h3> <h3>350um</h3> <h3>800um</h3> <h3>1100um</h3> <h3>1400um</h3> <h3>2000um</h3> <h3>1500um</h3> <h3>1800um</h3> <h3>3000um</h3> <h3>4000um</h3>