Any of the chiefly marine protozoans of the order Foraminifera, characteristically having a calcareous shell with perforations through which numerous pseudopods protrude.

• 有孔虫一种有孔虫目的大多为海洋的原生动物，以具有带孔的钙质壳为特征，通过该孔有许多虚足突出