本文所研究的非海相双壳类化石,系笔者(姚培毅)与我所刘训、傅德荣二位同志于 1983年5月赴广西十万大山地区进行野外地质调查时,在扶绥县那派,邕宁县英雄岭水库和宁明县把里等地(图1) 下白垩统新隆组的中上部采获的。化石主要产在紫红色泥岩,灰黄绿色粉砂岩及细砾岩中。在这些岩层中都不同程度地保存有动物化石。但以粉砂岩中保存最佳,数量 The non-marine bivalve fossils researched in this paper are written by two authors, Liu Pei and Fu Derong, from the author (Yao Peiyi) to the field survey in Shiyan Dashan in Guangxi in May 1983, , Yingxiong Yingxiongling Reservoir and Ningming County and other places (Figure 1) under the Cretaceous Xinlong Formation in the upper part of the harvest. Fossils are mainly produced in mauve mudstone, gray-yellow-green siltstone and fine conglomerate. Animal fossils are preserved to varying degrees in these strata. But to preserve the best in siltstone, the amount