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双壳纲的数目在1969—71年Treatise出版时,为6亚纲13目,52超科,186科,109亚科,3065属及亚属.至1980年Genera of Bivalvia(Vokes编)再版时,为6亚纲,14目,5亚目,61超科,196科,103亚科,4904属及亚属.另外喙壳纲Rostroconcha的3目,7科,37属及亚属已从本纲中分出.双壳纲工作者的人数,据1976年世界古生物工作者名册统计,共530人,其中古生代90人,中生代246人,新生代177人,不分时代的17人.这里面有少人兼顾数代,故有少量重复.这个统计不包括中国.苏联和发展中国家的统计也很不完全.据名册新版的预告中说,新名
The number of bivalve species is 13 subfamily 6, 52 superfamily, 186 families, 109 subfamilies, 3065 genera and subgenus when Treatise was published from 1969 to 71. By 1980 Genera of Bivalvia (Vokes) reprinted , Subfamily 6, subfamily 14, subfamily 5, subfamily 61, subfamily 196, subfamily 103, subfamily 4904. In addition, the order 3, 7, 37, and subgenus Rostroconcha According to the statistics of the world paleontological workers in 1976, a total of 530 people, including 90 Paleozoic, Mesozoic 246, Cenozoic 177, regardless of the era of 17. In this There are few people take into account several generations, so a small amount of repetition.This statistic does not include China.The statistics of the Soviet Union and developing countries is also very incomplete.According to the roster of a new version of the notice, the new name