Stenocranus (Fujinuma, 2016)

Fujinuma, Satoshi & Hayashi, Masami, 2025, Taxonomic revision of Japanese Stenocranus (Hemiptera: Fulgoromorpha: Delphacidae), Zootaxa 5706 (3), pp. 301-336 : 332-333

publication ID	https://doi.org/10.11646/zootaxa.5706.3.1
publication LSID	lsid:zoobank.org:pub:8EC89B9A-3A22-4437-AE42-DF61387992EC
persistent identifier	https://treatment.plazi.org/id/F1704704-D64B-AD0D-FF1A-FA58FA348FC7
treatment provided by	Plazi
scientific name	Stenocranus
status

Treatment

Key to species of Stenocranus View in CoL and Ceratocranus in Japan

1. Antennal segment II 4× less than wide ( Fig. 1K View FIGURE 1 ), second tarsomere with 4 spines ( Fig. 3N View FIGURE 3 ), gonoplacs very broad ( Fig. 11J View FIGURE 11 )........................................................................................ 2 ( Stenocranus View in CoL )

- Antennal segment II 4× longer than wide ( Fig. 3F View FIGURE 3 ), second tarsomere with 5 spines ( Fig. 3O View FIGURE 3 ), gonoplacs slender ( Fig. 14L View FIGURE 14 ).............................................................................. 11 ( Ceratocranus View in CoL gen. nov.)

2. Gonostyles broad in widest view, directed medially at apices, with long basal angles ( Figs 11G, 11H View FIGURE 11 ); phallotheca flattened laterally in apical half, with one or two apical processes ( Figs 11A, 11B View FIGURE 11 )......................................... 3

- Gonostyles narrow in widest view, directed dorsomedially at apices, with short basal angles ( Fig. 11I View FIGURE 11 ); phallotheca not flattened in apical half, with one or two apical processes ( Fig. 11C View FIGURE 11 )..................................................... 4

3. Frons with dark stripes along submedian carinae ( Fig. 1K View FIGURE 1 ); phallotheca narrow in lateral view, with two apical processes ( Fig. 11A View FIGURE 11 )........................................................................................ S. niisimai View in CoL

- Frons with feeble dark stripes from base to apex ( Fig. 1L View FIGURE 1 ); phallotheca broad in lateral view, with one apical process ( Fig. 11B View FIGURE 11 )................................................................................... S. tamagawanus View in CoL

4. Frons mostly dark except carinae; pronotum and mesonotum relatively dark except whitish vitta ( Figs 1F, 1M View FIGURE 1 )........... 5

- Frons with dark stripes; pronotum and mesonotum relatively pale except whitish vitta ( Figs 1J, 1O View FIGURE 1 ).................... 7

5. Frons with two median carinae ( Fig. 1M View FIGURE 1 ); forewings with curved dark stripes ( Fig. 1F View FIGURE 1 ); phallotheca with one apical process bearing one short process ( Fig. 11C View FIGURE 11 )............................................................ S. sapporensis View in CoL

- Frons usually with one median carina; forewings without above stripes........................................... 6

6. Forewings in summer form dark particularly in membrane ( Fig. 1I View FIGURE 1 ); phallotheca with one apical process bearing two short processes ( Fig. 12A View FIGURE 12 )......................................................................... S. harimensis View in CoL

- Forewings in summer form darker than S. harimensis View in CoL particularly in male ( Fig. 2E View FIGURE 2 ); phallotheca with two apical processes bearing one short process on right process ( Fig. 13A View FIGURE 13 )............................................... S. takasagonis View in CoL

7. Body relatively small; phallotheca with one apical process..................................................... 8

- Body relatively large; phallotheca with two apical processes................................................... 9

8. Frons with dark stripes partly feeble along basal half of median carina ( Fig. 2K View FIGURE 2 ); phallotheca simply tubular, with one apical process ( Fig. 12C View FIGURE 12 )..................................................................... S. kisimotoi View in CoL sp. nov.

- Frons with wide dark stripes ( Fig. 1O View FIGURE 1 ); phallotheca broaden subapically, with one small process originating from opening for aedeagus ( Fig. 12B View FIGURE 12 )........................................................................ S. tateyamanus View in CoL

9. Frons with dark stripes feeble to lacking in basal 2/3 ( Fig. 2M View FIGURE 2 ); phallotheca with two apical processes, left process longer than right process ( Fig. 13B View FIGURE 13 ); anal tube with acute processes on middle of ventral margin........................... S. fallax View in CoL

- Frons with dark stripes from base to apex; anal tube without above processes.................................... 10

10. Forewings with dark markings on apices of membrane ( Fig. 2I View FIGURE 2 ); phallotheca with two apical processes, right process not bifurcated ( Fig. 13C View FIGURE 13 )..................................................................... S. chenzhouensis View in CoL

- Forewings usually without dark markings on apices of membrane ( Fig. 3A View FIGURE 3 ); phallotheca with two apical processes, right process bifurcated at middle ( Fig. 14A View FIGURE 14 )....................................................... S. tonghuaensis View in CoL

11. Pronotum and mesonotum with dark stripes along lateral margins ( Fig. 3C View FIGURE 3 ); phallotheca with long apical and short subapical processes ( Fig. 14I View FIGURE 14 )....................................................................... C. agamopsyche View in CoL

- Pronotum and mesonotum with orange stripes along lateral margins ( Fig. 3D View FIGURE 3 ); phallotheca with two long processes on apical and subapical parts ( Fig. 14J View FIGURE 14 )........................................................... C. aurantius View in CoL sp. nov.