回顾类三角蚌超科的分类研究兼论其与珠蚌超科的交替消长

REVIEW ON THE CLASSIFICATION OF TRIGONIOIDACEA WITH SPECIAL REFERENCE TO THE ALTERNATE PROSPERITY AND DECLINE OF UNIONACEA AND TRIGONIOIDACEA

五十余年来,在亚洲中、东部非海相侏罗、白垩纪地层里,发现了颇多的有意义的类三角蚌超科(Trigonioidacea)化石群。自类三角蚌(Trigonioides Kobayashi etSuzuki,1936)、褶珠蚌(Plicatounio Kobaya-shi et suzuki,1936)和假嬉蚌(PseudohyriaMacNeil,1936)被发现以后,与它们有关的、即曾被归人类三角蚌超科的蚌类化石属和亚属,已超过40个。

This paper gives a brief review on the clas- sification of the superfamily Trigonioidacea.It emphasizes that the distinguishing characters of this superfamily are the pseudoheterodent hinge teeth and the peculiar position of the anterior pedal retractor muscle scar.The present paper also ma- kes a discussion on the characters of the families Trigonioididae,Nippononaiidae,Plicatounionidae, Pseudohyriidae,the subfamilies Trigonioidinae and Peregrinoconchinae in the family Trigonioididae and the subfamilies Pseudohyrinae and Sainshand- inae in the family Pseudohyriidae.Based mainly on the distribution and development of the Mesozoic and Cenozoic naiads in China,the present writer is inclined to indicate that both of the superfa- milies Trigonioidacea and Unionacea showed a tendency of alternate prosperity and decline in their development;such a tendency is more obvious in the development of the genera Lamprotula and Trigonioides.