Notes on the nomenclature of two species of Septaria (Gastropoda, Neritidae)

Lamarck in 1816 figured and named Navicella lineata and Navicella tessellaria, they are at present considered two forms of the same species. A few years later Lamarck (1822) changed the spelling of the latter name to Navicella tessellata, without giving an explanation. Since that time authors have been using all three species names for the species involved, often with the wrong year of publication. On top of that, some authors added to the confusion by omitting one “l” in the name, forming the erroneous subsequent spelling tesselata. As both names lineata and tessellaria were published in the same work, a First Reviser action is needed to establish the name to be used. As we did not find a previous correct selection in the literature, we herein select the name Navicella tessellaria Lamarck, 1816 to take precedence over Navicella lineata Lamarck, 1816. Furthermore, the synonymy of Septaria tessellaria is revised. As a result of this revision, Septaria atra (Reeve, 1842) is newly recognized as an earlier name for Septaria clypeolum (Récluz, 1843). Septaria dravadica Prashad, 1934 is found to be a new synonym of Septaria tessellaria