Aphelocheirus

Key to the Chinese species of Aphelocheirus 1. Macropterous forms................................................................................... 2 - Brachypterous forms.................................................................................. 15 2. Larger species, body length exceeding 10 mm............................................................... 3 - Smaller species, body length less than 10 mm.............................................................. 10 3. Head produced ahead of eyes for more than 1 the dorsal length of an eye......................................... 4 - Head produced ahead of eyes for less than 1 the dorsal length of an eye (Figs. 1 A���E)............................... 5 4. Abdominal ventrite VI lacking a conspicuous projecting tab; rostrum reaching the bases of hind coxae..................................................................................................... A. amplus Liu et Zheng - Abdominal ventrite VI having a conspicuous projecting tab; rostrum only attaining middle coxae. A. maculosus Liu et Zheng 5. Rostrum only reaching the bases of middle coxae........................................................... 6 - Rostrum reaching or over pass the bases of hind coxae........................................................ 7 6. Posterolateral angles of pronotum obtuse, broadly rounded; embolium lateral angles obtuse, broadly rounded................................................................................................... A. altigradus Zettel - Posterolateral angles of pronotum very sharp; embolium lateral angles produced to a sharp acute point................................................................................................. A. longidentatus Liu et Ding 7. Abdominal ventrite VI having a conspicuous projecting tab................................................... 8 - Abdominal ventrite VI lacking a conspicuous projecting tab................................... A. motuoensis sp. nov. 8. Rostrum reaching to bases of hind coxae; coloration light brown................................................ 9 - Rostrum reaching beyond hind trochanters; coloration dark brown.................... A. similaris Polhemus et Polhemus 9. Inner projections of propleuron terminating in slender acute apices; female subgenital plate roughly triangular................................................................................................. A. carinatus (Royer) - Inner projections of propleuron apices rounded; female subgenital plate truncate apically.................................................................................................... A. cantonensis Polhemus et Polhemus 10. Head produced ahead of eyes for less than 1 the dorsal length of an eye......................................... 11 - Head produced ahead of eyes for more than 1 the dorsal length of an eye....................... A. amurensis Kiritshenko 11. Head produced ahead of eyes for more than 0.65 the dorsal length of an eye...................................... 12 - Head produced ahead of eyes for less than 0.5 the dorsal length of an eye; legs yellow............... A. luteus Liu et Ding 12. Pronotum width obviously 3 times larger than its length...................................................... 13 - Pronotum width almost 3 times equal to its length........................................... A. sinensis Montandon 13. Inner projections of propleuron with apex coming to sharp acute angles apically; mesotrochanter and metafemur without swellings........................................................................................... 14 - Inner projection of propleuron with apex coming to a slender acute points (Fig. 2 B); mesotrochanter and metafemur raise swellings (Figs. 2 I, J)............................................................... A. longlingensis sp. nov. 14. Embolium lateral angles obtuse, broadly rounded....................................... A. improcerus Kiritshenko - Embolium lateral angles produced to a sharp acute point, rostrum reaching middle trochanter..... A. brunneus Liu et Zheng 15. Posterolateral angles of pronotum obtuse, broadly rounded, posterior margin sinuate............................... 16 - Posterolateral angles of pronotum very sharp (Fig. 1 F); male parameres distinctive and covered with long hair; left paramere is smaller than right paramere.................................................................. A. nawae Nawa 16. Forewings touching medially, or nearly so................................................................. 17 - Forewings widely separated medially..................................................................... 20 17. Trailing edge of forewings paralleled to the II abdominal segment.............................................. 18 - Trailing edge of forewings closed to the II abdominal segment, formed one open triangle...... A. thai Polhemus et Polhemus 18. Male lacking deep colour swelling on ventral face of hind femur............................................... 19 - Male with deep colour swelling on ventral face of hind femur................................................. 23 19. The abdominal tergite I could not be seen from dorsal habitus.................................. A. hainanensis Zettel - The abdominal tergite I could be obviously seen from dorsal habitus................................. A. jendeki Zettel 20. Scutellum width significantly greater than 3 the scutellum length............................................... 21 - Scutellum width for less than 3 the scutellum length......................................................... 22 21. Scutellum lateral margins straightly; head produced ahead of eyes for less than 0.45 the dorsal length of an eye.................................................................................... A. dudgeoni Polhemus et Polhemus - Scutellum lateral margins weakly sinuate; head produced ahead of eyes for 0.50 the dorsal length of an eye or greater...................................................................................... A. ellipsoideus Liu et Ding 22. Pronotum width for less than 4 pronotum length; head produced ahead of eyes for more than 1.0 the dorsal length of an eye.................................................................................... A. yaumatsui Miyamoto - Pronotum width for more than 4 pronotum length; head produced ahead of eyes for 0.61 the dorsal length of an eye......................................................................................... A. denticeps Montandon 23. Rostrum reaching the bases of middle coxae................................... A. femoratus Polhemus et Polhemus - Rostrum reaching the bases of hind coxae........................................... A. tuberculipes Zettel et Tran
Published as part of Xie, Tong-Yin & Liu, Guo-Qing, 2014, Two new species and three new records of the genus Aphelocheirus (Hemiptera: Heteroptera: Aphelocheiridae) from China, pp. 222-230 in Zootaxa 3793 (2) on pages 223-224, DOI: 10.11646/zootaxa.3793.2.2, http://zenodo.org/record/228365