Classification of the genus Nanorthis
G. †Nanorthis Ulrich and Cooper 1936
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†Nanorthis carinata Laurie 1980
†Nanorthis hamburgensis Walcott 1884
†Nanorthis purmamarcaensis Benedetto and Carrasco 2002
†Nanorthis putilla Walcott 1924
Invalid names: Evenkinorthis [synonym]