Revision of the Australian planthopper genus Chidaea Emeljanov with a redescription of Cixius sidnicus Stål, 1859 (Hemiptera: Auchenorrhyncha: Fulgoromorpha: Cixiidae) Author Löcker, Birgit Author Holzinger, Werner E. text Zootaxa 2019 2019-11-04 4691 5 401 443 journal article 24992 10.11646/zootaxa.4691.5.1 1bdb44ea-c474-40cc-83a2-e0e4b45310aa 1175-5326 3527426 5B0FFE9A-AF71-49E3-85D4-5F0CF3C07CF7 Key to genera of Australian Cixiini 1 Median carina of frons forked........................................................................... 2 - Median carina of frons unforked ( Fig. 5C )................................................................. 3 2(1) First hind tarsomere with 8 apical teeth and 4 setae; angle formed by hind margin of pronotum rectangular or moderately obtuse; lateral carinae of pronotum in dorsal view c-shaped, lateral parts directed towards head; vertex in midline at least twice as long as pronotum.............................................................Genus Yanganaka Löcker, 2015 - First hind tarsomere with 5–7 apical teeth and no setae; angle formed by hind margin of pronotum broadly obtuse; lateral carinae of pronotum in dorsal view s-shaped, second bend turning towards mesonotum; vertex in midline about as long as pronotum...........................................................................Genus Aka White 1879 3(1) Second hind tarsomere without platellae but with three or fewer very fine setae.................................... 4 - Second hind tarsomere with four or more platellae........................................................... 6 4(3) Apical transverse carina of vertex deeply u-shaped.............................. Genus Monomalpha Emeljanov, 2000 - Apical transverse carina of vertex v-shaped, shallowly u-shaped or almost straight.................................. 5 5(4) Basal compartment of vertex about as long as wide.................................. ‘ Iolania ’ vittipennis Muir, 1931 [Note: Iolania Kirkaldy, 1902 is a genus restricted to the Hawaiian Islands ( Hoch 2006 ); the generic placement of ‘ Iolania ’ vittipennis will be resolved at a later stage during this research project. ‘ Iolania ’ clypealis Muir, 1931, keys out under Leades Jacobi, 1928 , as it appears to be closely related to this genus (Löcker, 2007).] - Basal compartment of vertex no more than half as long as wide........................Genus Leptolamia Metcalf, 1936 6(3) Second hind tarsomere with two fewer platellae than apical teeth; forewing with CuA2 reaching the margin of forewing in its entire thickness....................................................................................... 7 - Second hind tarsomere with four fewer platellae than apical teeth; forewing with CuA2 either ending well before it reaches the margin of the forewing or reaching the margin but with slightly reduced thickness............................................................................................................ Genus Calamister Kirkaldy, 1906 7(6) Male anal style about as long as 11 th segment ( Fig. 23E ). Male anal tube with ventral lobe in lateral view usually narrow near base, widening towards apex ( Fig. 23E ). Forewing with crossvein r-m 1 usually distad or at same level as fork MP1+2 and MP3+4 ( Fig. 15E , 28H ). Radius anterior (RA) forked or unforked...........................Genus Chidaea Emeljanov - Male anal style distinctly longer than 11 th segment (11 th segment about 2/3–3/4 as long as anal style). Male anal tube with ventral lobe in lateral view tapering (widest near base). Forewing with crossvein r-m 1 usually distinctly basad of fork MP1+2 and MP3+4. Radius anterior (RA) unforked............................................... Genus Leades Jacobi, 1928