Classification of the genus Ilyanassa
G. Ilyanassa Stimpson 1865
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†Ilyanassa arata Say 1824
†Ilyanassa corbis Olsson 1967
†Ilyanassa granifera Conrad 1868
†Ilyanassa harpuloides Conrad 1844
†Ilyanassa irrorata Conrad 1863
†Ilyanassa isogramma Dall 1892
†Ilyanassa johnsoni Dall 1892
†Ilyanassa marthae Olsson 1967
Ilyanassa obsoleta Say 1822
†Ilyanassa scalaspira Conrad 1868
†Ilyanassa schizopyga Dall 1892
†Ilyanassa sexdentata Conrad 1843
Ilyanassa trivittata Say 1822
†Ilyanassa wilmingtonensis Gardner 1943