Table 2 in A new genus for two species of Japanese fireflies having aquatic larvae (Coleoptera, Lampyridae) and a definition of Luciola s. str.

Table 2. Comparison of morphological features of Aquatica Fu et al., 2010 and Nipponoluciola gen. nov.
Aquatica Fu et al., 2010 (Fig. 4A‒D)Nipponoluciola gen. nov.Recorded from China, Korea and Russia with one species from JapanRecorded only from JapanElytra black, may have fine paler margins, or elytra yellowElytra blackPronotal width slightly less than humeral widthPronotal width subequal to humeral widthPronotal lateral margins divergent along length or subparallel-sided in posterior halfPronotal lateral margins slightly divergent along lengthElytra with no well defined interstitial linesElytra with at least two well defined interstitial linesBase of epipleuron wideBase of epipleuron narrowHumerus narrowly visible or not visible from beneathHumerus widely visible from beneathEpipleuron visible at elytral margins level with or anterior to posterior margin of MSEpipleuron visible at elytral margins well behind posterior margin of MSMale V 7 without angulate cornersV 7 with angulate cornersMale LO retracted to anterior half of V 7LO occupies most of V 7Aedeagal BP without median notchAedeagal BP usually with median notchML of aedeagus with apical area much narrower than restML of aedeagus with apical area not much narrower than restLateral margins of posterior area of aedeagal sheath sternite with toothed projectionsLateral margins of posterior area of aedeagal sheath sternite without toothed projectionsPosterior area of aedeagal sheath sternite about as wide as anterior area except for A. lateralisPosterior area of aedeagal sheath sternite much narrower than anterior areaFemale with thin apically acute bursa platesFemale no bursa platesFemale MO plate elongated may project into vaginaFemale MO plate short, not much wider than long, not projecting into vagina