Gonatopus Ljungh 1810

Key to the females of Gonatopus in Japan (modified from Mita & Olmi, 2013) 1. Enlarged claw with one small subapical tooth.............................................................. 2 - Enlarged claw with one large subapical tooth............................................................... 3 2. Pronotum rounded, not crossed by transverse impression (Group 6)............................................ 11 - Pronotum crossed by transverse impression (Group 7)........................................................ 5 3. Palpal formula 6/3 (Group 4).......................................................................... 12 - Palpal formula different, at least labial palpus with two palpomeres............................................. 4 4. Palpal formula 2–4/2 (Group 2)........................................................................ 13 - Palpal formula 5/2 (Group 10)......................................................................... 17 5. Metapectal-propodeal complex mostly granulated, at most faintly striated on propodeal declivity; T1 of proleg longer, at least 1.5 × T4............................................................................. G. yasumatsui Olmi - Metapectal-propodeal complex distinctly striated by transversal carinae, with or without granules on surface between carinae; and/or T1 of proleg shorter, at most 1.2 × T4............................................................... 6 6. Metapectal-propodeal complex distinctly granulated and with transversal carinae; chela with inner margin of T5 bearing two rows of lamellae on distal half; body black........................................... G. javanus (R.C.L. Perkins) - Metapectal-propodeal complex transversely striated, with or without granules; chela with inner margin of T5 of foreleg bearing one or two rows of lamellae entirely; body color variable, at least head or part of mesosoma testaceous to reddish........ 7 7. Meso-metapleural suture absent.......................................................................... 8 - Meso-metapleural suture distinctly present................................................................. 9 8. Mesothorax distinctly slender; mesosoma bi-colored........................................ G. schenklingi Strand - Mesothorax not slender; mesosoma brown with dark spots................................. G. adelphos Mita & Olmi 9. Mesoscutum flat, not producing; lateral pointed apophysis absent.............................. G. clavipes (Thunberg) - Mesoscutum producing; lateral pointed apophysis developed................................................. 10 10. Mesopleuron and anterior part of metapectal-propodeal complex striate with surface between carinae granulate; very large species (5.8–7.2mm)...................................................... G. gigantostratiotes Mita, nom. nov. - Mesopleuron and anterior part of metapectal-propodeal complex smooth, not striate; not very large species (2.5–5.4 mm)........................................................................... G. hishimonovolus Xu & He, 1997 11. Chela with inner margin of T5 bearing one row of lamellae on distal half........................ G. pedestris (Dalman) - Chela with inner margin of T5 bearing 1–2 rows of lamellae entirely...................... G. andoi (Esaki & Hashimoto) 12. Meso-metapleural suture distinct; mesopleuron and metapectal-propodeal complex smooth, not striate except propodeal declivity................................................................. G. tambiniae (Esaki & Hashimoto) - Meso-metapleural suture absent; mesopleuron and metapectal-propodeal complex largely striate except metapectal-propodeal disc.............................................................................. G. tagoi Mita, sp. nov. 13. Temple developed.................................................................................... 14 - Temple absent...................................................................................... 16 14. Metanotum longer, more than twice as long as mesoscutellum.......................... G. nigricans (R.C.L. Perkins) - Metanotum shorter, at most as long as mesoscutellum....................................................... 15 15. Mesopleuron and metathorax strongly striate; species found in rice paddy............. G. flavifemur (Esaki & Hashimoto) - Mesopleuron and metathorax weakly striate; species found in grassland.......................... G. camelinus Kieffer 16. Metanotum smooth, excluding posterior margin of mesoscutellum sculptured by short longitudinal keels; meso-metapleural suture absent; metapectal-propodeal disc without longitudinal furrow............................. G. malesiae (Olmi) - Metanotum transversely striated; meso-metapleural suture obsolete, but present; metapectal-propodeal disc with longitudinal furrow............................................................................................................................................................................. G. lankae (Ponomarenko) 17. Mesoscutum longitudinally carinate; metanotal region more steep............................. G. formicicolus (Kiffer) - Mesoscutum smooth excluding pair of longitudinal carinae on lateral margins; metanotal region less steep. G. asiaticus (Olmi)