used of mollusks having two shells (as clams etc.) 同义词：bivalve,
例句与用法
1.
During the primary research work of chengjiang biota , the paleontologists had an idea that the bivalved arthropod kunmingella douvilleiyas the dominant species because they found that eighty percent of the fossils they excavated in chengjiang fossil lagerstatte were kunmingella douvillei . and they also found that naraoia longicaudata , naraoia spinosa and isoxys auritus which belong to arthropoda were the sub - dominant species 在澄江生物群研究初期，双瓣壳节肢动物朵氏昆明虫( kunmingelladouvillei )化石数量占澄江化石库中所有化石产量的百分之八十，因而古生物学家曾认为kunmingelladouvillei是该库的优势种。
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