A Purbeck clam shrimp (Subclass Phyllopoda, Order Diplostraca) fauna is described based on a new collection, containing Liograpta subquadrata (Sowerby in Fitton, 1836) and Carapacestheria? lulworthensis sp. nov. from the Freshwater Beds, and an unidentified taxon from the Caps and Dirt Beds of the Purbeck Limestone Formation (Tithonian–Valanginian) of southwest England (UK). The scanning electron micrographs clearly show that Liograpta has puncta on growth bands near the umbo; puncta also occur between the radial lirae on the middle and ventral parts of the carapace. This newly identified type of carapace ornamentation does not occur in previously described Liograpta species from localities outside the UK, which should be moved out of Liograpta (Novozhilov, 1954). The Middle Jurassic Wolfestheria patagoniensis (Tasch in Tasch and Volkheimer, 1970) from Argentina has typical puncta and radial lirae ornamentation, and it should be assigned to Liograpta.

Purbeck 蛤蜊虾（Phyllopoda 亚纲，Diplostraca 目）动物群是根据一个新集合进行描述的，其中包含Liograpta subquadrata（Sowerby in Fitton，1836 年）和Carapacestheria ? 卢尔沃思菌 十一月 来自淡水床，以及来自英格兰西南部（英国）Purbeck 石灰岩组（Tithonian-Valanginian）的 Caps and Dirt Beds 的不明分类群。扫描电子显微照片清楚地表明，Liograpta在靠近 umbo 的生长带上有斑点；甲壳中部和腹侧的桡骨之间也有斑点。这种新发现的甲壳装饰在先前描述的Liograpta中没有出现来自英国以外地区的物种，应将其移出Liograpta (Novozhilov, 1954)。来自阿根廷的中侏罗世Wolfestheria patagoniensis (Tasch in Tasch and Volkheimer, 1970) 具有典型的斑点和放射状纹饰，应归于 Liograpta。