Fig 9 in New species of Kuqaia from the Lower Jurassic of Sweden indicates a possible water flea (Crustacea: Branchiopoda) affinity

Fig 9. Kuqaia scanicus sp. nov. and morphologically similar fossils of Daphnia ephippia. The geological ages, the estimated dates of differentiation of the Daphnia lineage, and the age of the oldest fossil record of Daphnia, are plotted. Scale bars = 100 μm. SEM image of Daphnia similis used with permission from [48]; line drawings of Daphnia pulicaria and 'undefined Chyoridae' compiled by the authors and interpreted from images in [34]. https://doi.org/10.1371/journal.pone.0282247.g009