◆エウタカントゥス・グラキリス (絶滅) Euthacanthus gracilis Powrie 1870
syn.Euthacanthus elegans Powrie 1870 Euthacanthus macnicolli Moy-Thomas 1939 non Powrie 1864 Euthacanthus mitchelli Goodchild 1904 *1870『On the Earliest Known Vestiges of Vertebrate Life, Being a Description of the Fish Remains of the Old Red Sandstone Rocks of Forfarshire:James Powrie』。 *1904『The Older Deutozoic Rocks of North Britain:John George Goodchild』。 *1939『Palaeozoic Fishes:James Alan Moy-Thomas』。 *1940『Система рыбообразных и рыб, ныне живущих и ископаемых:Лев Семенович Берг』。 *2017『Comparison of the Vertebrate Faunas of the Lower Old Red Sandstone of the Anglo-Welsh Basin with Contemporary Faunas in Scotland:Michael James Newman, Carole Jan Burrow, Robert Gray Davidson, Jan L.den Blaauwen & Roger Jones』。
グッドチャイルドはパウリーの記述と紹介するが、著書内には存在しない。
◆エウタカントゥス・ムクニコリ (絶滅) Euthacanthus mcnicoli Powrie 1864non Moy-Thomas 1939 ※=M'Nicoli。
syn.Euthacanthus grandis Powrie 1870 Euthacanthus macnicoli Woodward 1891 ※後付。 *1864『On the Fossiliferous Rocks of Forfarshire and Their Contents:James Powrie』。 *1870『On the Earliest Known Vestiges of Vertebrate Life, Being a Description of the Fish Remains of the Old Red Sandstone Rocks of Forfarshire:James Powrie』。 *1891『Catalogue of the Fossil Fishes in the British Museum Natural History 2, Containing the Elasmobranchii/Acanthodii, Holocephali, Ichthyodorulites, Ostracodermi, Dipnoi & Teleostomi/Crossopterygii & Chondrostean/Actinopterygii:Arthur Smith Woodward』。 *2017『Comparison of the Vertebrate Faunas of the Lower Old Red Sandstone of the Anglo-Welsh Basin with Contemporary Faunas in Scotland:Michael James Newman, Carole Jan Burrow, Robert Gray Davidson, Jan L.den Blaauwen & Roger Jones』。