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根据最近在大英博物馆发现的燕海扇(Aviculopecten)模式种的新材料(Fang and Morris,1999),燕海扇的不等壳性终于得到确认.因此,有必要对Newell和Boyd (1995)的燕海扇超科(Aviculopectinacea)的分类方案作若干修正:1995年定义的燕海扇科(Aviculopectinidae)无效,应由本文新提出的早坂海扇科(Hayasakapectinidae)取而代之;埃赛海扇科(Etheripectinidae)一名由Newell(1969)定义的燕海扇科取代.“,”Evidence provided by Fang and Morris (1999) requires several changes in the Newell and Boyd (1995) taxonomy of aviculopectinacean bivalves.Availability of Aviculopecten as type genus for a family of inequivalve scallops makes our 1995 introduction of the name Etheripectinidae unnecessary.Our 1995 restricted diagnosis of Aviculopectinidae is invalid but is appropriate for Hayasakapectinidae,a name we introduce here.