◆トゥルケログナトゥス・ディストルトゥス (絶滅) †Trucherognathus distortus Branson & Mehl 1933 *1933『Conodont Studies 2, Conodonts from the Joachim, Middle Ordovician of Missouri (p77-167):Edward Bayer Branson & Maurice Goldsmith Mehl』。 *1958『A Key to Conodont Genera and Sub-Genera:Robert Oran Fay』。 *1968『Champlainian Biostratigraphy in Northern Michigan:Emil Charles Guldenzopf』。 *1968『Conodont Biofacies Analysis of Some Wilderness, Middle Ordovician Limestones, Ottawa Valley, Ontario 1964:Christopher Richard Barnes』。
◆トゥルケログナトゥス・イルレグラリス (絶滅) †Trucherognathus irregularis Branson & Mehl 1933 *1933『Conodont Studies 2, Conodonts from the Joachim, Middle Ordovician of Missouri (p77-167):Edward Bayer Branson & Maurice Goldsmith Mehl』。
◆トゥルケログナトゥス・パラレルルス (絶滅) †Trucherognathus paralellus Branson & Mehl 1933 *1933『Conodont Studies 2, Conodonts from the Joachim, Middle Ordovician of Missouri (p77-167):Edward Bayer Branson & Maurice Goldsmith Mehl』。 *1968『Conodont Biofacies Analysis of Some Wilderness, Middle Ordovician Limestones, Ottawa Valley, Ontario 1964:Christopher Richard Barnes』。