Mimosticus

Brunke, Adam & Solodovnikov, Alexey, 2014, Male secondary sexual characters resolve taxonomic uncertainty: five new species and a review of the formerly monotypic rove beetle genus Mimosticus Sharp (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 3893 (1) : -

Key to the species of Mimosticus

1 In dorsal view, neck constriction with nuchal ridge not visible ( Fig. 3 A–B); eyes usually larger, in dorsal view 2.4–3.6 times as long as tempora (usually tempora appear distinctly less than half the length of eye as in Fig. 3 A–B); antennomere 4 shorter, 1.5–2.0 times as long as wide ( Fig. 2 A–B)................................................................. 2

- In dorsal view, neck constriction with nuchal ridge distinct laterally ( Fig. 3 C–D); eyes usually smaller, in dorsal view 1.6–2.6 times as long as tempora (usually tempora appear at least as long as half the length of eye as in Fig. 3 C–D); antennomere 4 longer, 2.2–3.0 times as long as wide ( Fig. 2 C–D).............................................................. 3

2 Elytra bright metallic blue or bluish-green ( Fig. 1 A); abdominal segment VIII markedly bicolored, orange to yellow in apical half, contrasting with dark metallic remainder of abdomen ( Fig. 1 A); pronotum distinctly transverse ( Fig. 3 A); antennomeres shorter ( Fig. 2 A); eyes slightly shorter in dorsal view, 2.4–2.8 times as long as tempora ( Fig. 3 A); aedeagus in parameral view: paramere wider apically compared to subapically, apex rounded ( Fig. 8 A), internal sac with less pronounced sclerotized structures ( Fig. 9 A). Known from Costa Rica, Panama, and scattered localities in the South American Andes.................................................................................................... M. viridipennis, Sharp

- Elytra dull, metallic greyish blue ( Fig. 1 B); abdominal segment VIII not or only subtly bicolored, apical margin at most slightly paler than rest of abdomen ( Fig. 1 B); pronotum about as wide as long ( Fig. 3 B); antennomeres longer ( Fig. 2 B); eyes slightly longer in dorsal view, 3.0–3.5 times as long as tempora ( Fig. 3 B); aedeagus in parameral view: paramere gradually tapering towards the apex, apex slightly pointed ( Fig. 8 E), internal sac with more pronounced sclerotized structures ( Fig. 9 B). Known only from the South American Andes......................... M. tenuiformis Brunke and Solodovnikov , sp. n.

3 Elytra with bright, gold-green metallic reflection ( Fig. 1 C); eyes distinctly smaller, in dorsal view 1.6–2.0 times as long as tempora ( Fig. 3 C); antennomeres 7–10 wider ( Fig. 2 C)................... M. aeneipennis Brunke and Solodovnikov , sp. n.

- Elytra with bright blue, bluish purple or brassy-purple metallic reflection ( Fig. 1 D); eyes distinctly larger, in dorsal view 2.2–3.0 times as long as tempora ( Fig. 3 D); antennomeres 7–10 narrower ( Fig. 2 D) … sharpi species complex........... 4

4 Male tergite VIII with small, distinct notch ( Fig. 5 A); male sternite IX with only vague constriction halfway along its length ( Fig. 6 F); male tergite X with truncate apex ( Fig. 7 F); internal sac of aedeagus with copulatory sclerite weakly developed and small ( Fig. 9 G)..................................................... M. latens Brunke and Solodovnikov , sp. n.

- Male tergite VIII with evenly rounded apex; male sternite IX with distinct constriction forming an elongate basal ‘stem’ ( Fig. 6 D–E); male tergite X with apex more rounded ( Fig. 7 D–E); internal sac of aedeagus with copulatory sclerite well developed as a plate ( Fig. 9 E–F, ‘b’).............................................................................. 5

5 Male tergite X less elongate, apex with setae finer and shorter ( Fig. 7 D); ‘stem’ of male sternite IX broader, stem distinctly shorter than apical half ( Fig. 6 D); apex of male sternite VIII more acute, narrowing at a point closer to the base ( Fig. 4 D); internal sac of aedeagus with broad, emarginate copulatory sclerite ( Fig. 9 E, ‘b’).... M. sharpi Brunke and Solodovnikov , sp. n.

- Male tergite X more elongate, apex with setae coarser and longer, more uniform ( Fig. 7 E); ‘stem’ of male sternite IX narrower, stem nearly as long to equally as long as apical half ( Fig. 6 E); apex of male sternite VIII more obtuse, narrowing at a point closer to the apex ( Fig. 4 E); internal sac of aedeagus with narrow, non-emarginate copulatory sclerite ( Fig. 9 F, ‘b’)..................................................................... M. pseudosharpi Brunke and Solodovnikov , sp. n.

Figures

FIGURE 1. Dorsal habitus of Mimosticus viridipennis, Sharp (A), M. tenuiformis Brunke and Solodovnikov (B), M. aeneipennis Brunke and Solodovnikov (C) and M. sharpi Brunke and Solodovnikov (D). Scale bars = 2 mm.

FIGURE 2. Antennomeres 4 – 11: Mimosticus viridipennis, Sharp (A), M. tenuiformis Brunke and Solodovnikov (B), M. aeneipennis Brunke and Solodovnikov (C) and M. sharpi Brunke and Solodovnikov (D). Ventral forebody of M. tenuiformis (E). Mesotrochanter and mesofemur of M. tenuiformis (F). Hindwing of M. aeneipennis, vein MP 4 fused to CuA (G). Scale bars = 1 mm.

FIGURE 3. Forebody of Mimosticus viridipennis, Sharp (A), M. tenuiformis Brunke and Solodovnikov (B), M. aeneipennis Brunke and Solodovnikov (C) and M. sharpi Brunke and Solodovnikov (D). Scale bars = 1 mm. a—anterior frontal puncture, b—oculomarginal puncture, c—posterior frontal puncture, d—vertical puncture.

FIGURE 4. Male sternite VIII of Mimosticus viridipennis, Sharp (A), M. tenuiformis Brunke and Solodovnikov (B), M. aeneipennis Brunke and Solodovnikov (C), M. sharpi Brunke and Solodovnikov (D), M. pseudosharpi Brunke and Solodovnikov (E) and M. latens Brunke and Solodovnikov (F). Scale bars = 0.5 mm.

FIGURE 5. Male tergite VIII of M. latens Brunke and Solodovnikov (A). Female tergite X of M. sharpi Brunke and Solodovnikov (B). Scale bars = 1 mm.

FIGURE 6. Male sternite IX of Mimosticus viridipennis, Sharp (A), M. tenuiformis Brunke and Solodovnikov (B), M. aeneipennis Brunke and Solodovnikov (C), M. sharpi Brunke and Solodovnikov (D), M. pseudosharpi Brunke and Solodovnikov (E) and M. latens Brunke and Solodovnikov (F). Scale bars = 0.2 mm.

FIGURE 7. Male tergite X of Mimosticus viridipennis, Sharp (A), M. tenuiformis Brunke and Solodovnikov (B), M. aeneipennis Brunke and Solodovnikov (C), M. sharpi Brunke and Solodovnikov (D), M. pseudosharpi Brunke and Solodovnikov (E) and M. latens Brunke and Solodovnikov (F). Scale bars = 0.5 mm.

FIGURE 8. Aedeagus of Mimosticus viridipennis Sharp (A – D), M. tenuiformis Brunke and Solodovnikov (E) and M. sharpi Brunke and Solodovnikov (F). Parameral view (A – B, E – F), lateral view (C – D). Internal sac not everted (A, C, E, F), internal sac everted (B, D). Scale bars = 0.5 mm.

FIGURE 9. Abparameral view of median lobe of the aedeagus, showing internal sac in situ: Mimosticus viridipennis, Sharp (A), M. tenuiformis Brunke and Solodovnikov (B), M. aeneipennis Brunke and Solodovnikov (C), M. sharpi Brunke and Solodovnikov (D). Copulatory sclerite of internal sac of M. sharpi (E), M. pseudosharpi Brunke and Solodovnikov (F) and M. latens Brunke and Solodovnikov (G). Scale bars = 0.2 mm. a—ventral apex of paramere showing peg setae-like structures, b—copulatory sclerite, arrow—apical margin of copulatory sclerite.