The Solnhofen Konservat‐Lagerstätte yields a great number of remarkably preserved fossils of eumalacostracan crustaceans that help us understand the early radiation of several groups with modern representatives. One fossil from there, Francocaris grimmi Broili, 1917 is a small shrimp‐like crustacean originally described about 100 years ago as a mysidacean crustacean (opossum shrimps and relatives) from latest Kimmeridgian – early Tithonian (Upper Jurassic) of the Solnhofen Lithographic Limestones of Southern Germany. New material with exceptionally preserved specimens, allied with modern imaging techniques (mostly composite fluorescence microscopy), allows us to provide a detailed re‐description of this species. The most striking feature of Francocaris grimmi is an extremely elongated thoracopod 7 with its distal elements forming a spiny sub‐chela. This character supports a sister group relationship of Francocaris grimmi with Eucopiidae, an ingroup of Lophogastrida, pelagic peracaridans common in marine environments throughout the world. We also discuss other supposed fossil representatives of Lophogastrida, identifying all of them as problematic at best. The structure of the sub‐chela in F. grimmi indicates an original use in raptorial behaviour. Francocaris grimmi appears to be unique in possessing such a far posterior sub‐chelate appendage as a major raptorial structure. In most representatives of Euarthropoda in which sub‐chelate appendages occur and are used for food intake, they are usually closer to the mouth.

中文翻译：

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100年后：从侏罗纪上索伦霍芬Lagerstätte侏罗纪的常绿甲壳类甲壳动物的详细视图，并附有Euarthropoda特有的猛禽附肢

SolnhofenKonservat-Lagerstätte产生了大量保存完好的Eumalacostracan甲壳类动物化石，可帮助我们了解具有现代代表的几个群体的早期辐射。那里的化石是Francocaris grimmi Broili，1917年，它是一种类似于虾的甲壳类甲壳动物，大约在100年前被描述为来自最新Kimmeridgian –早期Tithonian（南部侏罗纪）的Solnhofen岩性石灰石石灰岩的一种甲壳类甲壳类甲壳动物（负鼠及其亲属）。德国。带有保存完好的标本的新材料，再加上现代成像技术（主要是复合荧光显微镜），使我们能够对该物种进行详细的重新描述。Francocaris grimmi最引人注目的功能是一个极其细长的胸足7，其远端元素形成了一个棘状的亚螯。这个角色支持弗朗卡卡里斯·格里米（Francocaris grimmi）与Eucopiidae的姐妹群关系，Eupicopiidae是Lophogastrida的一类，Lophogastrida是在全球海洋环境中普遍存在的中上层四翼猿。我们还讨论了Lophogastrida的其他假设化石代表，将所有这些化石充其量认为是有问题的。F. grimmi的亚螯的结构表明其在猛禽行为中的原始用途。Francocaris grimmi拥有如此远的后螯合附属物作为主要的猛禽结构似乎是独特的。在大多数食肉足纲动物的代表中，存在次螯合的附属物并用于食物摄取，它们通常更靠近口腔。