Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis Author Linnaeus, Carolus text 1758 Laurentius Salvius Stockholm https://archive.org/download/mobot31753000798865/mobot31753000798865.pdf book 2C6327E1-5560-4DB4-B9CA-76A0FA03D975 https://doi.org/10.5962/bhl.title.542 3922206 Cancer pulex [ spec. nov. ] C. macrourus articularis, manibus adactylis, cauda attenuata spinis bifidis. It. oel. 42, 96. Fn. svec. 1253. Frisch. ins. 7. t. 18. It. gotland. 260. Raj. ins. 44. Pediculus fluviatilis. Habitat ad Maris littora. Species 54-59 ob thoracem Lorica destitutum & singularem structuram corporis adeo a reliquis Cancris recedunt, ut facile genus distinctum constituerent.