Itagonia

Shi, Ai-Min, Yuan, Shi-Bin & Wu, Chun-Lian, 2010, Three new species of Itagonia Reitter, 1887 (Coleoptera, Tenebrionidae: Blaptini) from Sichuan, China, Zootaxa 2573, pp. 57-68 : 57-58

Key to the species of the genus Itagonia from China

1. Upper edge of inner surface of profemur ( Figs 1–5 ) with tooth near apex .................................................................. 2

- Upper edge of inner surface of profemur with arcuate prominence or obtuse-angled prominence ( Figs 6–10 , 14 , 27 , 40 ) near apex ................................................................................................................................................................. 7

2. Upper edge of inner surface of profemur with sharp acute-angled tooth ( Figs 1–2 ) near apex ................................... 3

- Upper edge of inner surface of profemur with obtuse or rectangular tooth ( Figs 3–5 ) near apex .............................. 4

3. Pronotum widest behind the middle. Anterior 1/2 and apical part of outer margin of epipleura visible from above. Ventral surface of protarsomere 1 with hair brush .......................................................... I. provostii ( Fairmaire, 1888)

- Pronotum widest in the middle. Outer margin of epipleura visible from above nearly along entire length. Ventral sur- face of protarsomeres 1 and 2 with hair brushes .................................................................... I. semenowi Reitter, 1889

4. Less than anterior 1/2 and apical part of outer margin of epipleura visible from above .............................................. 5

- Anterior part of outer margin of epipleura not visible from above or only anterior 1/3 visible from above or outer margin of epipleura visible from above along entire length ......................................................................................... 6

5. Lateral margins of pronotum converging to base with almost straight sides in basal half. Prosternum in front of procoxae oblique to the horizontal plane. Metatibiae straight. .................................................. I. zayica Shi & Ren, 2007

- Lateral margins of pronotum almost parallel-sided in basal half. Prosternum in front of procoxae almost vertical. Metatibiae arcuate ............................................................................................................... I. baxoica Liu & Ren, 2009

6. Pronotum noticeably transverse. Elytral surface with dense irregular prominences. Only apical part of outer margin of epipleura visible from above. ...................................................................................... I. shamaevi Medvedev, 2004

- Pronotum slightly transverse. Elytral surface with punctures. Outer margin of epipleura visible from above along entire length ................................................................................................................. I. szetschwana ( Schuster, 1923)

7. Upper edge of inner surface of profemur with arcuate prominence or massive arcuate prominence ( Fig. 6–8 , 14 ) near apex ............................................................................................................................................................................... 8

- Upper edge of inner surface of profemur with obtuse-angled prominence ( Fig. 9–10 , 27 , 40 ) near apex................. 12

8. Antennae longer, when posteriorly extended, noticeably reaching beyond pronotal base. Upper spur of protibiae slightly longer than the lower one. Outer margin of epipleura visible from above along entire length. Ventral surface of protarsomeres 1 and 2 with hair brushes. Ventral surface of mesotarsomere 1 with apical tuft of pale hairs............ ....................................................................................................................................... I. longicornis Shi & Ren, 2007

- Antennae shorter, when posteriorly extended, not reaching or neaely reaching pronotal base. Upper spur of protibiae noticeable longer than the lower one ............................................................................................................................ 9

9. Ventral surface of protarsomeres 1and 2 with hair brushes ........................................................................................ 10

- Ventral surface of protarsomeres 1 to 3 with hair brushes.......................................................................................... 11

10. Pronotum widest immediately before the base. Elytral surface coarse, with irregular prominences and sparse punctures. Less than anterior 1/2 and apical part of outer margin of epipleura visible from above. Body length 10.6–11.5 mm .............................................................................................................................................. I. tuberculata , sp. nov.

- Pronotum widest immediately before the middle. Elytral surface smooth, with dense delicate punctures and fine rugosity. Outer margin of epipleura visible from above along entire length. Body length 9.2–10.2 mm ...................... ............................................................................................................................................ I. bisetosa Medvedev, 1998

11. Pronotum surface absence of flattening along outer margins. Outer margin of epipleura in dorsal view concealed by outer convexity of elytra only in apical 1/3. Body significantly smaller, length 9.6 mm .. I. trisetosa Medvedev, 1998

- Pronotal surface distinctly widely flattened along outer margins in basal half. Outer margin of epipleura visible from above only in apical part of elytra. Body large, length 10.8–11.7 mm .................................... I. mera Medvedev, 1998

12. Outer margin of epipleura visible from above along entire length............................................................................. 13

- Outer margin of epipleura visible from above in anterior 2/5–1/2, or in anterior 2/5 and apical part ....................... 14

13. Pronotum 1.35 times as wide as long. Lateral margins of pronotum not reflexed. Ventral surface of protarsomeres 1 and 2 with hair brushes. ............................................................................................................ I. xinlongensis , sp. nov.

- Pronotum 1.24–1.25 times as wide as long. Lateral margins of pronotum distinctly reflexed. Ventral surface of protarsomeres 1 and 2 with apical tuft of pale hairs .................................................................. I. elegans Medvedev, 1998

14. Antennae long, when posteriorly extended, reaching pronotal base. Pronotum weakly transverse, 1.11–1.17 times as wide as long. Outer margin of epipleura visible from above in in anterior 2/5 and apical part. Ventral surface of protarsomeres 1 to 3 with hair brushes .............................................................................................. I. medvedevi , sp. nov.

- Antennae short, when posteriorly extended, reaching posterior 1/3–1/4 of pronotum. Pronotum noticeably transverse, 1.25–1.37 times as wide as long. Outer margin of epipleura visible from above in anterior 2/5–1/2. Ventral surface of protarsomeres 1 and 2 with small hair brushes or apical tuft of pale hairs .. I. cordiformis Shi & Ren, 2007

Figures

FIGURES 1 – 10. Apical part of profemur. 1. I. provostii (Fairmaire); 2. I. semenowi Reitter; 3. I. zayica Shi & Ren; 4. I. baxoica Liu & Ren; 5. I. shamaevi Medvedev; 6. I. longicornis Shi & Ren; 7. I. trisetosa Medvedev; 8. I. mera Medvedev; 9. I. elegans Medvedev; 10. I. cordiformis Shi & Ren. (Fig. 1 from Egorov, 2007; Fig. 2 from Ren & Yu, 1999; Fig. 4 from Liu & Ren, 2009; Fig. 5 from Medvedev, 2004; Figs 7 – 9 from Medvedev, 1998)

FIGURES 11 – 23. Itagonia tuberculata, sp. nov. 11. antenna of male; 12. antenna of female; 13. pronotum of male; 14. profemur and protibiae of male; 15. mesofemur and mesotibiae of male; 16 – 17. apical part of aedeagus in dorsal and ventral views; 18. aedeagus in lateral view; 19. spiculum gastrale; 20. abdominal inner sternite 8 of male; 21 – 22. ovipositor in dorsal and ventral views; 23. spiculum ventrale.

FIGURES 24 – 36. Itagonia xinlongensis, sp. nov. 24. antenna of male; 25. antenna of female; 26. pronotum of male; 27. profemur and protibiae of male; 28. mesofemur and mesotibiae of male; 29 – 30. apical part of aedeagus in dorsal and ventral views; 31. aedeagus in lateral view; 32. spiculum gastrale; 33. abdominal inner sternite 8 of male; 34 – 35. ovipositor in dorsal and ventral views; 36. spiculum ventrale.

FIGURES 37 – 49. Itagonia medvedevi, sp. nov. 37. antenna of male; 38. antenna of female; 39. pronotum of male; 40. profemur and protibiae of male; 41. mesofemur and mesotibiae of male; 42 – 43. apical part of aedeagus in dorsal and ventral views; 44. aedeagus in lateral view; 45. spiculum gastrale; 46. abdominal inner sternite 8 of male; 47 – 48. ovipositor in dorsal and ventral views; 49. spiculum ventrale.