One new species of Plakolana Bruce, 1993 and three new species of Cirolana Leach (1818), from the Lower Cretaceous (Aptian) Sierra Madre Formation dolomites at El Espinal quarries (Central-East Chiapas, SE Mexico) are reported and described and compared with other fossil species Cirolanidae from around the world. The specimens consist of the body and a few moults, with showing various degrees of decay but most of them with preserved taxonomic features, including mandibles, pereonites, pereopods, pleonites, pleotelson and uropods. This is the third report of fossil marine or estuarine isopods from the Cretaceous of Mexico and the second on the Peracarida of El Espinal quarries, as well as the first record of fossil Cirolana and Plakolana from Mexico.

报道并描述了一种新的物种，它们来自和描述于El Espinal采石场（中东部恰帕斯州，墨西哥）的下白垩纪（阿普特人）Sierra Madre组白云岩，一种是新物种Plakolana Bruce，1993年，另一种是Cirolana Leach物种（1818年）。来自世界各地的其他化石科。标本由尸体和少数蜕变组成，表现出不同程度的腐烂，但大多数具有分类学特征，包括下颌骨，珍珠岩，珍珠脚，浮石，褶皱和尾足动物。这是第三次来自墨西哥白垩纪的海洋或河口化石的化石报告，第二次是在El Espinal采石场的Peracarida上的报告，也是化石Cirolana和Plakolana的第一个记录 来自墨西哥。