TABLE 1 in Nagisavelia hikarui, a new genus and species of Mesoveliinae (Hemiptera: Heteroptera: Mesoveliidae) inhabiting shingle beaches in Japan

TABLE 1. Character matrix of eight genera of Mesoveliinae (based on Andersen & Polhemus 1980, 2003). CharactersNagisavelia gen. nov.CavaticoveliaCryptoveliaDarwiniveliaMesoveliaMnioveliaPhrynoveliaSpeoveliaTotal length (mm)2.3–2.83.6–4.21.2–1.31.82.0–4.51.8–2.01.5–1.82.6–4.0Head lengthvery longvery longmoderateshortmoderate-longshortlonglongBase of headweakly depressedstrongly de- pressedcarinateweakly de- pressedstrongly de- pressedweakly de- pressedstrongly depressedweakly depressedMedian head fur- rowweakabsentabsentabsentweakdeep, glabrousweakweakTrichobothrial patternregularregularregularirregularvariableirregularregularregularEyesvestigialvestigialstrongly reducedreducednormalvery largenormalreducedAntennaefilamentaryfilamentaryflagelliformfilamentaryvariableflagelliformflagelliformfilamentaryAntenna or body longerbodyantennabodybodybodybodybodyantennaSpines on antennaeabsentpresentabsent, long hairsabsentpresentabsent, strong hairsabsent, strong hairspresentHead ventervery long, weakly carinatevery long, simplelong, ridged, distinctly cari- nateshort, carinatelong, simpleshort, ridged, weakly carinatelong, ridged, simple or weakly carinatelong, simpleLabial length tomiddle of abdomenmiddle of abdo- menbase of abdomenmetacoxaemeso- or meta- coxaemetacoxaemeso- or meta- coxaemesocoxaeThoracic segments Spines on legsI> II> III absent but hind tibia weakI> III> II weakI ≧ II> III absent or presentI> III> II weakII> III ≧ I strongI> II> III absentI> II = III weakI> II> III strongMetatarsal seg- mentsIII> II> III> III> IIII> II> IIII> II> III ≧ III> III> III> IIII> II> III> III> IScent reservoirsimplesimpledivideddividedsimpledivideddividedsimpleOvipositor serra- tionmoderatemoderateweakmoderatemoderatestrongmoderatemoderateGonoplacslargelargesmalllargelargesmallsmalllargeGynatrial sacsmallsmallsmallsmallsmalllargesmallsmallAnterior end of egg?truncate, with captruncate, without captruncate, with captruncate, vari- abletruncate, with cap?truncate, without cap