Acrotona Thomson

Lee, Seung-Gyu & Ahn, Kee-Jeong, 2018, A taxonomic review of Korean Acrotona Thomson with a description of new species (Coleoptera, Staphylinidae, Aleocharinae), Zootaxa 4418 (3), pp. 247-263 : 248

Key to Korean species of the genus Acrotona Thomson

1. Body color relatively darker (Habitus, figs. 1A, D–G); antennomeres compactly close together ( Fig. 6A )............... 2

- Body color relatively paler (Habitus, figs. 1B–C); antennomeres moderately or loosely close together ( Fig. 5A ).......... 6

2. Body length about 2.0 mm (Habitus, fig. 1E).......................................... Acrotona (Acrotona) setaria

- Body length more than 2.0 mm.......................................................................... 3

3. Antennomere 5 subquadrate, slightly transverse ( Figs. 6A , 7A )................................................ 4

- Antennomere 5 quadrate, about as long as wide............................................................ 5

4. Macrochaetal arrangement of abdominal tergites II–III 01-03; male sternite VIII with seven macrosetae, posterior margin slightly round, without macrosetae ( Fig. 6C )................................................ A. (A.) pseudotenera

- Macrochaetal arrangement of abdominal tergites II–III 01-12; male sternite VIII with more than ten macrosetae, posterior margin truncate, with five macrosetae ( Fig. 7C )..................................................... A. (A.) vicaria

5. Body color darker; length less than 2.5 mm (Habitus, fig. 1A); eyes relatively small, about as long as temples..................................................................................................... A. (A.) aterrima

- Body color paler; length more than 2.5 mm (Habitus, fig. 1F); eyes relatively large, slightly longer than temples; elytra paler............................................................................... A. (A.) suspiciosa suspiciosa

6. Body less glossy and convex (Habitus, fig. 1B); labrum with nine macrosetae on each side of mildline ( Fig. 2A ); abdominal tergite III without anterior macroseta................................................... A. (A.) koreana sp. nov.

- Body distinctly glossy and convex (Habitus, fig. 1C); labrum with eight macrosetae on each side of mildline; abdominal tergite III with anterior macroseta.................................................................. A. (A.) lutulenta

Figures

FIGURE 2. Acrotona (Acrotona) koreana sp. nov. A, labrum (dorsal aspect); B, epipharynx (ventral aspect); C, right mandible (dorsal aspect); D, left mandible (ventral aspect); E, left maxilla (ventral aspect); F, labium (ventral aspect).

FIGURE 5. Acrotona (Acrotona) lutulenta. A, antenna; B, male abdominal tergite VIII (dorsal aspect); C, male abdominal sternite VIII (ventral aspect); D, female abdominal tergite VIII (dorsal aspect); E, female abdominal sternite VIII (ventral aspect); F, median lobe of aedeagus (lateral aspect); G, median lobe of aedeagus (ventral aspect); H, paramere (lateral aspect); I, spermatheca. Scales = 0.1 mm.

FIGURE 6. Acrotona (Acrotona) pseudotenera. A, antenna; B, male abdominal tergite VIII (dorsal aspect); C, male abdominal sternite VIII (ventral aspect); D, female abdominal tergite VIII (dorsal aspect); E, female abdominal sternite VIII (ventral aspect); F, median lobe of aedeagus (lateral aspect, everted internal sac); G, median lobe of aedegus (lateral aspect, not everted internal sac); H, median lobe of aedeagus (ventral aspect); I, paramere (lateral aspect); J, spermatheca. Scales = 0.1 mm.

FIGURE 7. Acrotona (Acrotona) vicaria. A: antenna; B: male abdominal tergite VIII (dorsal aspect); C: male abdominal sternite VIII (ventral aspect); D: female abdominal tergite VIII (dorsal aspect); E: female abdominal sternite VIII (ventral aspect); F: median lobe of aedeagus (lateral aspect); G: median lobe of aedeagus (ventral aspect); H: paramere (lateral aspect); I: spermatheca. Scales = 0.1 mm.