A large,coin-shaped,fossil foraminifer of the genus Nummulites,widely distributed in limestone formations from the Eocene Epoch to the Miocene Epoch of the Cenozoic. 貨幣蟲(chóng)貨幣蟲(chóng)躰形大而呈硬幣狀，化石有孔的蟲(chóng)，從始新世到新生代的中新世廣泛分佈在石灰?guī)r地層中。
A large, coin-shaped, fossil foraminifer of the genus Nummulites, widely distributed in limestone formations from the Eocene Epoch to the Miocene Epoch of the Cenozoic. 貨幣蟲(chóng)貨幣蟲(chóng)躰形大而呈硬幣狀，化石有孔的蟲(chóng)，從始新世到新生代的中新世廣泛分佈在石灰?guī)r地層中