The captioned illustrations (Maynard 1920:pl. 25, figs. 3, 4) were published prior to the text. The taxon thus dates from the publication of the name in the caption accompanying the illustrations, not from the subsequently published text (Article 12.2.7, ICZN, 1999:17). The date of publication is September 30, 1920. Plate 25 was issued as part of "Part Two" of the Contributions to the History of Cerionidae, therefore authorship of this taxon is attributed to Maynard and Clapp.