Itagonia

Shi, Ai-Min & Ren, Guo-Dong, 2007, Two new species of Itagonia Reitter (Coleoptera, Tenebrionidae: Blaptini) from Tibet, China, Zootaxa 1483, pp. 33-39 : 33-34

Key to the species of the genus Itagonia from Tibet and Sichuan

1. Outer margin of epipleura visible from above throughout its entire length ................................................ 2

- Outer margin of epipleura only partly visible from above (anterior and posterior parts of outer margin of epipleura visible from above or only anterior part visible from above)...................................................... 4

2. Upper edge of inner surface of profemur with tooth. Spurs of protibiae subequal in length. Antennae, when posteriorly extended, not reaching pronotal base. Anterior margin of pronotum sinuate, not bordered. Anterior angles of pronotum obtuse, rounded apically, posterior ones obtuse................................... ....................................................................................................................... I. szetschwana Schuster, 1923

- Upper edge of inner surface of profemur with arcuate or obtuse-angled prominence. Upper spur of protibiae noticeable longer than the lower one ..................................................................................................... 3

3. Anterior margin of clypeus weakly sinuate. Pronotum widest immediately before the middle. Upper edge of inner surface of profemur with massive arcuate prominence near apex. Ventral surface of protarsomeres 1 and 2 with hair brushes ................................................................................... I. bisetosa Medvedev, 1998

- Anterior margin of clypeus deeply sinuate. Pronotum widest in the middle. Upper edge of inner surface of profemur with obtuse-angled prominence near apex. Ventral surface of protarsomeres 1 and 2 with apical tuft of pale hairs .................................................................................................. I. elegans Medvedev, 1998

4. Upper edge of inner surface of profemur with arcuate prominence. Ventral surface of protarsomeres 1 to 3 with hair brushes.......................................................................................................................................... 5

- Upper edge of inner surface of profemur with obtuse-angled prominence or obtuse tooth near apex. At most ventral surface of protarsomeres 1 and 2 with hair brushes................................................................ 6

5. Anterior margin of clypeus shallowly sinuate. Antennae, when posteriorly extended, not reaching pronotal base. Anterior margin of pronotum rather deeply sinuate. Outer margin of epipleura visible from above in anterior 2/3. Ventral surface of mesotarsomere 1 with hair brush ................. I. trisetosa Medvedev, 1998

- Anterior margin of clypeus rather deeply sinuate. Antennae, when posteriorly extended, almost reaching pronotal base. Anterior margin of pronotum shallowly sinuate. Outer margin of epipleura visible from above only in apical part of elytra. Ventral surface of mesotarsomere 1 with apical tuft of pale hairs......... ................................................................................................................................ I. mera Medvedev, 1998

6. Antennae short, when posteriorly extended, reaching posterior 1/3–1/4 of pronotum. Anterior margin of pronotum sinuate, not bordered. Intercoxal process of prosternum steeply sloping behind procoxae. Upper edge of inner surface of profemur with obtuse-angled prominence near apex. Ventral surface of mesotarsomere 1 with apical tuft of pale hairs ....................................................................... I. cordiformis , sp. nov.

- Antennae long, when posteriorly extended, reaching pronotal base. Anterior margin of pronotum straight, bordered laterally. Intercoxal process of prosternum obliquely sloping behind procoxae. Upper edge of inner surface of profemur with obtuse tooth near apex. Ventral surface of mesotarsomere 1 with small hair brush .................................................................................................................................. I. zayica , sp. nov.