Philhygra

Lee, Seung-Gyu & Ahn, Kee-Jeong, 2012, A taxonomic review of Korean species of the genus Philhygra Mulsant & Rey (Coleoptera: Staphylinidae: Aleocharinae), Zootaxa 3483, pp. 58-70 : 59

Key to the Korean species of Philhygra

1. Pronotal pubescence in midline directed anteriorly in apical half and posteriorly in basal half ( Fig. 7 B); a-sensillum of labrum short ( Fig. 6 B); prementum with medial pseudopores present................................................. 2

- Pronotal pubescence in midline directed anteriorly ( Fig. 8 B); a-sensillum of labrum relatively long ( Fig. 4 B); prementum with medial pseudopores absent.............................................................................. 3

2. Tergite VIII with 5 macrosetae on each side of midline ( Fig. 6 D); male sternite VIII with 12 macrosetae on each side of midline ( Fig. 6 E)..................................................................... P. pseudoelongatula

- Tergite VIII with 4 macrosetae on each side of midline ( Fig. 7 D); male sternite VIII with 8 macrosetae on each side of midline ( Fig. 7 E)...................................................................................... P. sparsa

3. Antennomeres 8–10 slightly elongate; tergite VIII with more than 5 macrosetae on each side of midline............... 4

- Antennomeres 8–10 about as long as wide or slightly transverse; tergite VIII with 4 macrosetae on each side of midline... 5

4. Body length less than 4.0 mm ( Fig. 1 A); tergite VIII with 5 macrosetae on each side of midline; posterior margin of male sternite VIII broadly round.................................................................... P. elongatula

- Body length more than 4.0 mm ( Fig. 1 D); tergite VIII with 7 macrosetae on each side of midline; posterior margin of male sternite VIII subtruncate......................................................................... P. polaris

5. Body relatively robust ( Fig. 1 B); mesoventral process distinctly pointed at apex ( Fig. 3 B); female sternite VIII with short marginal setae ( Fig. 3 D).................................................................... P. homoeopyga

- Body relatively narrow in dorsal aspect ( Figs. 1 C, 1G); mesoventral process pointed or slightly pointed at apex ( Fig. 4 C); female sternite VIII with moderately long marginal setae...................................................... 6

6. Head about as wide as long; posterior margin of tergite VIII emarginate ( Fig. 4 D); posterior margin of male sternite VIII with conspicuously long marginal setae ( Fig. 4 E); posterior margin of female sternite VIII convex, more or less round..................................................................................................... P. palustris

- Head slightly longer than wide; posterior margin of tergite VIII truncate ( Fig. 8 D); posterior margin of male sternite VIII with moderately long marginal setae; posterior margin of female sternite VIII subtruncate.................... P. yokkaichiana

Figures

FIGURE 1. Habitus of Philhygra. A, P. elongatula, 3.4 mm; B, P. homoeopyga, 3.6 mm; C, P. palustris, 2.9 mm; D, P. polaris, 4.0 mm; E, P. pseudoelongatula, 3.0 mm; F, P. sparsa, 3.1 mm; G, P. yokkaichiana 2.9 mm.

FIGURE 3. Philhygra homoeopyga. A, antenna, dorsal aspect; B, meso- and metaventrites, ventral aspect; C, male tergite VIII, dorsal aspect; D, posterior margin of female sternite VIII, ventral aspect; E, median lobe, lateral aspect; F, median lobe, ventral aspect; G, paramere, lateral aspect. Scale bars 0.1 mm.

FIGURE 4. Philhygra palustris. A, antenna, dorsal aspect; B, labrum, dorsal aspect; C, meso- and metaventrites, ventral aspect; D, male tergite VIII, dorsal aspect; E, posterior margin of male sternite VIII, ventral aspect; F, median lobe, lateral aspect; G, median lobe, ventral aspect; H, paramere, lateral aspect. Scale bars 0.1 mm.

FIGURE 6. Philhygra pseudoelongatula. A, antenna, dorsal aspect; B, labrum, dorsal aspect; C, meso- and metaventrites, ventral aspect; D, male tergite VIII, dorsal aspect; E, male sternite VIII, ventral aspect; F, median lobe, lateral aspect; G, median lobe, ventral aspect; H, paramere, lateral aspect. Scale bars 0.1 mm.

FIGURE 7. Philhygra sparsa. A, antenna, dorsal aspect; B, pronotum, dorsal aspect; C, meso- and metaventrites, ventral aspect; D, male tergite VIII, dorsal aspect; E, male sternite VIII, ventral aspect; F, median lobe, lateral aspect; G, median lobe, ventral aspect; H, paramere, lateral aspect. Scale bars 0.1 mm.

FIGURE 8. Philhygra yokkaichiana. A, antenna, dorsal aspect; B, pronotum, dorsal aspect; C, meso- and metaventrites, ventral aspect; D, male tergite VIII, dorsal aspect; E, median lobe, lateral aspect; F, median lobe, ventral aspect; G, paramere, lateral aspect. Scale bars 0.1 mm.