New species of Thylacocephala, Eodollocaris keithflinti n. gen., n. sp., from the Mazon Creek Lagerstätte, Illinois, United States (c. 307 Ma) and redescription of other Mazon Creek thylacocephalans Author Laville, Thomas Centre de Recherche en Paléontologie (CR 2 P, UMR 7207), Sorbonne Université-MNHN-CNRS, Muséum national d’Histoire naturelle, Département Origines et Évolution, case postale 38, 57 rue Cuvier, F- 75231 Paris cedex 05 (France) and Department of Biology, Ludwig-Maximilians-Universität München, Grosshaderner Strasse 2, 82152 Planegg-Martinsried (Germany) thomas.laville1@edu.mnhn.fr Author Haug, Joachim T. Department of Biology, Ludwig-Maximilians-Universität München, Grosshaderner Strasse 2, 82152 Planegg-Martinsried (Germany) and GeoBio-Center, Ludwig-Maximilians-Universität München, Richard-Wagner-Strasse 10, 80333 München (Germany) joachim.haug@palaeo-evo-devo.info Author Haug, Carolin Department of Biology, Ludwig-Maximilians-Universität München, Grosshaderner Strasse 2, 82152 Planegg-Martinsried (Germany) and GeoBio-Center, Ludwig-Maximilians-Universität München, Richard-Wagner-Strasse 10, 80333 München (Germany) carolin.haug@palaeo-evo-devo.info text Geodiversitas 2021 2021-05-06 43 10 295 310 journal article 7027 10.5252/geodiversitas2021v43a10 bb69ed40-0261-4e0d-8264-ef27d3064148 1638-9395 4746542 urn:lsid:zoobank.org:pub:F9F1091A-DDD1-40C4-81B6-F254151D7D47 Genus Eodollocaris Laville, J.T. Haug & C. Haug, n. gen. urn:lsid:zoobank.org:act: 52E16EC8-EAB2-457C-94D2-C187234EC1A3 ETYMOLOGY. — Referring with ‘-dollocaris’ to the similarities to Paradollocaris vannieri Charbonnier, 2017 and the Mesozoic form more generally, and ‘Eo-’ to refer to an early form of it TYPE SPECIES . — Eodollocaris keithflinti n. gen., n. sp. DIAGNOSIS. — As for the species.