Tingidae

Souma, Jun & Ishikawa, Tadashi, 2022, Taxonomic review of the tingine genera Cysteochila, Hurdchila, Physatocheila, and Xynotingis from Japan, with description of a new genus (Hemiptera: Heteroptera: Tingidae), Zootaxa 5150 (1), pp. 1-42 : 35-36

Key to the genera and subgenera of Tingidae occurring in Japan

Modified after the keys provided by Takeya (1962) and Yamada & Tomokuni (2012).

1 Pronotum quinquecarinate................................................. Cantacader Amyot & Serville, 1843

- Pronotum unicarinate or tricarinate....................................................................... 2

2 Pronotum with undeveloped posterior proccess........................................... Phatnoma Fieber, 1844

- Pronotum with well-developed posterior proccess............................................................ 3

3 Pronotum without paranotum............................................................................ 4

- Pronotum with paranotum.............................................................................. 5

4 Cu (cubital) vein of hemelytron indistinct; R+M (radiomedial) vein indistinct................. Agramma Stephens, 1829

- Cu vein of hemelytron distinct; R+M vein distinct.......................................... Eteoneus Distant, 1904

5 Paranotum expanding outward, not covering pronotal disc..................................................... 6

- Paranotum expanding inward, covering pronotal disc........................................................ 27

6 Paranotum carinate in its entire length; anterior margin of hemelytron nearly straight................................ 7

- Paranotum rounded at least in posterior part; anterior margin of hemelytron curved................................. 9

7 Head with four spines; paranotum without distinct areolae in its entire length; R+M vein of hemelytron not carinate........................................................................................... Leptoypha Stål, 1873

- Head with five spines; paranotum with distinct areolae at least at level of calli; R+M vein of hemelytron carinate......... 8

8 Collar not reflexed upward; paranotum with distinct areolae in anterior half............... Eritingis Drake & Ruhoff, 1962

- Collar reflexed upward; paranotum with distinct areolae at level of calli................ Perissonemia Drake & Poor, 1937

9 Paranotum subvertical................................................................................ 10

- Paranotum subhorizontal or horizontal................................................................... 12

10 Discoidal area of hemelytron not expanding beyond middle of hemelytron......................... Metasalis Lee, 1971

- Discoidal area of hemelytron expanding beyond middle of hemelytron.......................................... 11

11 Antennal segment III as wide as segment IV............................................. Catoplatus Spinola, 1837

- Antennal segment III distinctly narrower than segment IV... Tropidocheila Fieber, 1844 (subgenus of Tingis Fabricius, 1803 )

12 Antennal segment III wider than segment II.............................................. Copium Thunberg, 1822

- Antennal segment III narrower than segment II............................................................. 13

13 Pronotum nearly flat in anterior part..................................................................... 14

- Pronotum convex in anterior part........................................................................ 15

14 Pronotum and hemelytron covered with pubescence longer than diameter of compound eye.................................................................................... Tingis (Tropidocheila) shaowuana Drake & Maa 1953

- Pronotum and hemelytron covered with pubescence shorter than diameter of compound eye or glabrous......................................................... Tingis Fabricius, 1803 (nominotypical subgenus of Tingis Fabricius, 1803 )

15 Cu vein of hemelytron indistinct........................................................................ 16

- Cu vein of hemelytron distinct.......................................................................... 19

16 Hood absent.................................................................... Campylosteira Fieber, 1844

- Hood present........................................................................................ 17

17 Outer margin of paranotum and anterior margin of hemelytron with denticles..................... Corythucha Stål, 1873

- Outer margin of paranotum and anterior margin of hemelytron without denticles.................................. 18

18 Pronotum tricarinate; hood semi-ellipsoid.............................................. Derephysia Spinola, 1837

- Pronotum unicarinate; hood roof-shaped........................................... Uhlerites latiorus Takeya, 1931

19 Hood roof-shaped.................................................................................... 20

- Hood semi-globose or semi-ellipsoid..................................................................... 21

20 Head with two spines; median and occipital spines on head absent, collected from moss............................................................................................................. Acalypta Westwood, 1840

- Head with four spines; median spine on head absent, collected from woody plants........... Uhlerites debilis (Uhler, 1896)

21 Pronotum unicarinate................................................................................. 22

- Pronotum tricarinate.................................................................................. 24

22 Outer margin of paranotum with robust denticles in its entire length; anterior margin of hemelytron with robust denticles in its entire length; R+M vein of hemelytron with denticles in its entire length.......... Acanthomoplax Souma & Kamitani, 2020

- Outer margin of paranotum without robust denticles in its entire length; anterior margin of hemelytron without robust denticles in its entire length; R+M vein of hemelytron without denticles in its entire length.................................. 23

23 Paranotum carinate in anterior part and rounded in posterior part; R+M vein of hemelytron indistinct..................................................................................................... Omoplax Horváth, 1912

- Paranotum rounded in its entire length; R+M vein of hemelytron distinct................................................................................................ Norba Horváth, 1912 (subgenus of Stephanitis Stål, 1873 )

24 Anterolateral angle of paranotum angular................................................................. 25

- Anterolateral angle of paranotum rounded................................................................. 26

25 Outer margin of paranotum angular; pronotal carinae carinate.................................. Belenus Distant, 1909

- Outer margin of paranotum rounded; pronotal carinae rounded................................ Galeatus Curtis, 1833

26 Paranotum protruding posteriad; lateral carinae of pronotum rounded............................................................................................... Menodora Horváth, 1912 (subgenus of Stephanitis Stål, 1873 )

- Paranotum not protruding posteriad; lateral carinae of pronotum carinate................................................................................... Stephanitis Stål, 1873 (nominotypical subgenus of Stephanitis Stål, 1873 )

27 Discoidal area of hemelytron scraggy, raised upward at apical angle............................................ 28

- Discoidal area of hemelytron flat, not raised upward at apical angle............................................ 30

28 Hood semi-ellipsoid; ostiolar peritreme well-developed...................................... Dulinius Distant, 1903

- Hood roof-shaped; ostiolar peritreme undeveloped.......................................................... 29

29 Paranotum bulged upward; outer margin of paranotum not resting on pronotal disc in its entire length..................................................................................................... Cochlochila Stål 1873

- Paranotum not bulged upward; outer margin of paranotum resting on pronotal disc in its entire length..... Dictyla Stål, 1874

30 Paranotum with a longitudinal ridge dividing whole into dorsal and ventral parts; paratergite IX in female bilobed......................................................................................... Heissiella Péricart, 1984

- Paranotum without longitudinal ridge; paratergite IX in female unilobed......................................... 31

31 Head longer than its maximum width across compound eyes; rostrum reaching abdominal sternite IV.................................................................................................... Xynotingis Drake, 1948

- Head shorter than its maximum width across compound eyes; rostrum not reaching abdominal sternite IV.............. 32

32 Outer margin of paranotum not resting on pronotal disc at least except anterior and posterior ends.................... 33

- Outer margin of paranotum resting on pronotal disc in its entire length.......................................... 34

33 Antennal segments I separated from each other at their bases; hood roof-shaped, lower than pronotal disc at highest part; outer margin of paranotum not resting on pronotal disc in its entire length............................. Idiocysta China, 1930

- Antennal segments I close to each other at their bases; hood semi-globose, higher than pronotal disc at highest part; outer margin of paranotum resting on pronotal disc at anterior and posterior ends......................... Limnostatua gen. nov.

34 Hood semi-globose or semi-ellipsoid, higher than pronotal disc at highest part; anterior margins of hemelytra nearly parallel to each other at rest.............................................................. Baeochila Drake & Poor, 1937

- Hood roof-shaped, lower than pronotal disc at highest part; anterior margins of hemelytra not parallel to each other at rest... .................................................................................................. 35

35 Maximum width across hemelytra narrower than maximum width across paranota; lateral margin of pronotum emarginate in anterior part; metasternal laminae continuous each other at posterior ends........................ Cysteochila Stål, 1873

- Maximum width across hemelytra wider than maximum width across paranota; lateral margin of pronotum not emarginate in anterior part; metasternal laminae separated from each other at posterior ends................ Physatocheila Fieber, 1844