钙球 meaning in English

calcisphere
calcospherite

Frame - building organisms mostly are sphinctozoa , inozoa , hydrozoa , tabulozoa . binding organisms mainly are bluegreen algae , tubiphytes and tabulozoa . accessory organisms are bryozoa , brachiopoda , foraminifera , echinodermata , etc . what ' s more , biota are different with various reef facies
在各相带内，生物组合也迥然不同，礁相以底栖生物为主，盆地相以海绵骨针、钙球、放射虫为特征，而礁后相则以裸海松藻、有孔虫、蜓类、棘皮类为特征。