Medhiama Bordoni

Zhou, Yu-Lingzi & Zhou, Hong-Zhang, 2012, Taxonomy of the genus Medhiama Bordoni, 2002 (Coleoptera: Staphylinidae, Staphylininae, Xantholinini) with descriptions of three new species, Zootaxa 3478, pp. 169-191 : 173

Key to species of the genus Medhiama Bordoni

(Excluding three species known from single females)

1 Body relatively large, longer than 8 mm .................................................................... 2

- Body medium or small, shorter than 8 mm .................................................................. 3

2 Body black in color; parameres of aedeagus broad and foot-like.......................... Medhiama nigromagna sp. n.

- Body brown in color; parameres of aedeagus simple and lobed............................... M. shichuanica Bordoni

3 Distance between head punctures longer or subequal to puncture diameter......................................... 4

- Distance between head punctures obviously less than puncture diameter.......................................... 6

4 Antennomere II shorter than antennomere III.................................................. M. zhengi Bordoni

- Antennomere II subequal to or slightly longer than antennomere III.............................................. 5

5 Number of punctures in admedian row on pronotum being more than 10...................... M. liupanshanensis sp. n.

- Number of punctures in admedian row on pronotum being 4................................. M. lanzhouensis Bordoni

6 Tempora, not wided and parallel.......................................................................... 7

- Tempora widened outwards.............................................................................. 8

7 Pronotum of same width as head; internal sac of aedeagus entirely bearing dense, very sclerotized spines.................................................................................................... M. wallstromi Bordoni

- Pronotum narrower than head; internal sac of aedeagus bearing sparse spines on the......................median portion.................................................................................. M. schawalleri Bordoni

8 Eye tiny, less than 1/5 of tempora length................................................................... 9

- Eye small, approximately 1/4 of tempora length............................................................ 10

9 Width of head longitudinal impunctate region ca 4–5 puncture diameters............................ M. puetzi Bordoni

- Width of head longitudinal impunctate region ca 2–3 puncture diameters....................... M. rhododendri Bordoni

10 Abdominal punctures sparsely distributed; parameres of aedeagus foot-like................... M. xiaolongmenensis sp. n.

- Abdominal punctures densely distributed; parameres of aedeagus not foot-like.................................... 11

11 Parameres complex, hook-like............................................................ M. paupera (Sharp)

- Parameres simple, substraight........................................................................... 12

12 Inner sac with two pairs of large spines..................................................... M. shanica Bordoni

- Inner sac without distinct spines......................................................... M. formosana Bordoni