Philhygra homoeopyga ( Eppelsheim, 1893 )

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 : 61-62

Philhygra homoeopyga ( Eppelsheim, 1893)

( Figs. 1 B, 3A–G)

Homalota homoeopyga Eppelsheim, 1893: 30 .

Atheta (Metaxya) nigropicea Poppius, 1909: 35 (as valid species).

Atheta (Hygroecia) homoeopyga: Brundin, 1944: 198 (as valid species). Atheta (Metaxya) nigropicea: Brundin, 1944: 198 (as synonym of Atheta homoeopyga ). Atheta (Philhygra) homoeopyga: Paśnik, 2001: 206 ; Smetana, 2004: 391 (as valid species).

Description. Body length 2.7–3.5 mm. Body ( Fig. 1 B) relatively robust and elongate in dorsal aspect. Head black; antennae, pronotum and elytra brown to dark brown, elytra paler than pronotum; abdominal tergites dark brown to black, posterior margin of each tergite paler; legs yellowish brown. Head surface glossy, with fine punctation, distance between punctures 2–3 times longer than their diameter; head about as long as wide, widest at middle; eyes about 1.2 times longer than tempora; antennomeres 4–7 slightly elongate, 8–10 about as long as wide, 11 about as long as preceding two combined ( Fig. 3 A); labrum broadly emarginate in anterior margin; a-sensillum long, pointed at apex; prementum with medial pseudopores absent and lateral pseudopores present. Pronotum slightly transverse, approximately 1.2 times as wide as long, widest at apical 2/5; midline pubescence directed anteriorly; punctation finer than on head, distance between punctures 1.5–3 times longer than their diameter; metanotal scutum with one long setae and about 3–4 short setae on each side of midline; mesoventral process elongate and distinctly pointed at apex, longer than metaventral process; length ratio of mesoventral process, isthmus and metaventral process 7:4:2 ( Fig. 3 B). Elytron approximately 1.7 times as long as wide, postero-lateral margin very weakly sinuate; flabellum composed of about 16 setae. Abdominal tergites glossy, with fine punctation, distance between punctures 1–2 times longer than their diameter; male tergite VIII ( Fig. 3 C) with 4 macrosetae on each side of midline, posterior margin subtruncate; male sternite VIII with 8 macrosetae on each side of midline, microsetae of postero-medial region distinctly denser than other regions, posterior margin truncate; posterior margin of female tergite VIII emarginate; posterior margin of female sternite VIII ( Fig. 3 D) weakly emarginate, conspicuous marginal setae present. Aedeagus as in Figs. 3 E–G.

Material examined. KOREA: Chungnam prov.: 24 ex., Gongju-si, Banpo-myeon, Mt. Gyeryongsan, Donghaksa, 12 vi 1999, US Hwang; Gangwon prov.: 6 ex., Hoengseong-gun, Cheongil-myeon, Mt. Balgyosan, 5 vii 1998, HJ Lim, KL You.

Distribution. Korea and Russia (East Siberia) ( Smetana 2004).

Remarks. This species is similar to P. palustris , but can be distinguished by the characters provided in the key and the shape and structure of aedeagus.

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.