and Ostreoida, but has very limited usage and has not been checked against recent phylogenetic hypotheses.这些物种其实最初全部被分类为真翼形类莺蛤目。后来首先是狐蛤目及牡蛎目从莺蛤目分出来，之后又再拆出海扇蛤目跟贻贝目。现在从最初到现在一直留在莺蛤目的，除却新设的一个科，就只有三个科。