Mimogonia

Irmler, Ulrich, 2007, The genus Mimogonia (Coleoptera: Staphylinidae: Osoriinae) from the Neotropical region with descriptions of four new species, Zootaxa 1651, pp. 57-64 : 63-64

Key to the Neotropical species of Mimogonia

1 Elytra bicoloured, anterior part light red and posterior part dark; head and 5th abdominal segment dark; pronotum light red ...................................................................................................................................... 2

- Unicoloured species, yellow or reddish-brown to dark brown, in some species the pronotum slightly lighter........................................................................................................................................................... 5

2 Smaller species, body length 1.7–1.8 mm. Male with a transverse carina on the 5th visible abdominal sternite. Eyes half as long as head. Aedeagus as in Fig. 5 d in Irmler 1981.................. M. tricolor Irmler, 1981

- Larger species, body length at least 2.0 mm. Male without transverse carina ............................................ 3

3 Eyes longer and more prominent. Posterior 1/3 of elytra dark. Aaedeagus as in Fig. 1 d in Irmler 2005..... ................................................................................................................................ M. elytrata Irmler, 2005

- Eyes not distinctly prominent. Dark colour of elytra restricted to the extreme posterior edge .................. 4

4 Head yellow, of similar colour as pronotum and elytra. Elytra with weak microsculpture, surface glossy. Comb of male mesotibia half as long as tibial length ( Figs. 2 , 5 C) .................................. M. hermani n.sp.

- Head darker than pronotum and elytra. Elytra with slightly deeper microsculpture, surface less glossy. Comb of male mesotibia 1/3 as long as tibial length ( Figs. 3 , 5 B) ............................... M. hanagarthi n.sp.

5 Large species, body length 3.3 mm. Elytra distinctly wider than long. Pronotum and elytra densely and coriaceously punctate. Eyes large and prominent. Aedeagus as in Fig. 3 d in Irmler 2005.......................... ........................................................................................................................ M. longoelytrata Irmler, 2005

- Smaller species, body not longer than 2.6 mm. Elytra quadrate or wider than long. Eyes not longer than half the length of the head .......................................................................................................................... 6

6 Smaller species, body length 1.7–1.9 mm. Elytra approximately 1.5 times as long as pronotum .............. 7

- Larger species, body length at least 2.1 mm. Elytra 1.3 times longer than pronotum ............................... 8

7 Antennae stout, 10th antennomere wider than the width of the male mesotibia. Male mesotibia slender, not distinctly widened in the middle. Aedeagus as in Fig. 7d in Irmler 1981............... M. pumilia Irmler, 1981

- Antennae more slender, 10th antennomere as wide as the width of the male mesotibia. Male mesotibia distinctly widened in the middle. Aedeagus as in Fig. 8d in Irmler 1981................. M. unicolor Irmler, 1981

8 Body unicoloured yellow. Eyes large and prominent, containing more than 100 ommatidia. Male mesotibia slender, half as wide as 10th antennomere. Aedeagus as in Fig. 6d in Irmler 1981....................... ............................................................................................................................. M. antennata Irmler, 1981

- Body darker, reddish-brown to dark brown or black. Antennae more slender. Male mesotibia widened in the middle .................................................................................................................................................... 9

9 Eyes small, containing approximately 50 ommatidia only. Hair comb of male mesotibia 1/5 as wide as total length of tibia. Aedeagus as in Fig. 3 d in Irmler 1981................................... M. brunnea Irmler, 1981

- Eyes larger, containing more than 100 ommatidia. Hair comb of male mesotibia at least 1/4 as long as total length of tibia..................................................................................................................................... 10

10 Antennae and legs brown. Hair comb of male mesotibia nearly half as long as total length of tibia ...... 11

- Antennae and legs yellow. Hair comb of male mesotibia 1/4 as long as total length of tibia ................... 13

11 Pronotum slightly lighter than head and elytra. Elytra with deep reticulate microsculpture, surface matt. Aedeagus as in Fig. 2 d in Irmler 1981................................................................. M. subopaca Irmler, 1981

- Pronotum as dark brown as the remaining forebody. Elytra with weaker reticulate microsculpture, surface slightly glossy ............................................................................................................................................ 12

12 Punctation of elytra slightly weaker, distance between punctures on average as wide as diameter of punctures ( Figs. 4 , 5 D) ............................................................................................................. M. huggerti n.sp.

- Punctation of elytra slightly coarser and denser, distance between punctures on average shorter than diameter of punctures ( Figs. 1 , 5 A) ................................................................................................. M. adisi n.sp.

13 Punctation of elytra finer and surface more glossy but with distinct microsculpture. Apex of aedeagus less arcuated ventrally, the apical hook weakly bent dorsad ( Fig. 2 d in Irmler 2005) ... M. andina Irmler, 2005

- Punctation of elytra denser and coarser, surface less glossy and with more distinct microsculpture. Apex of aedeagus with apical hook strongly bent dorsad ( Fig. 4 d in Irmler 1981) ........... M. similis Irmler, 1981

Figures

FIGURE 4. Details of Mimogonia huggerti. A: forebody, B: antenna, C: male right mesotibia in dorsal aspect, D: aedeagus. Scale bar A: 1 mm, B – D: 0.1 mm.

FIGURE 5. Surface of elytra of Mimogonia. A: M. adisi, B: M. hanagarthi, C: M. hermani, D: M. huggerti. Scale bar: 0.25 mm.

FIGURES 1 – 3. Details of Mimogonia. 1: M. adisi, 2: M. hermani, 3: M. hanagarthi; A: forebody, B: antenna, C: male right mesotibia in dorsal aspect, D: aedeagus. Scale bar A: 1 mm, B – D: 0.1 mm.