Orectochilus villosus ( Mueller , 1776)

Lee, Dae-Hyun & Ahn, Kee-Jeong, 2015, A taxonomic review of the Gyrinidae (Coleoptera) in Korea, ZooKeys 509, pp. 87-107 : 98-100

Taxon classification Animalia Coleoptera Gyrinidae

Orectochilus villosus ( Mueller, 1776) Figs 6, 32-40, 53-55, 57, 59

Gyrinus villosus Müller, 1776: 68.

Gyrinus modeeri Marsham, 1802: 100. Synonymized by Illiger (1807: 299).

Orectochilus villosus : Dejean 1883: 59.

Specimens examined.

SOUTH KOREA: Gyeonggi Prov.: 2 ♂♂ 3 ♀♀, Namyangju-si, Wabu-eub, Paldang-ri, Paldang-lake, 10.VI.1962, JS Lee (1 ♂ 1 ♀, on slide).

Published Korean records.

Orectochilus villosus : Yoon (1988: 615); Kim et al. (1994: 134); Cho and Park (2010: 96).

Diagnosis.

Length 5.5-6.5 mm. Dorsal surface dark brown; ventral surface mostly brown; ventral part of antennomere 2, mouthparts, hypomera, epipleura; legs yellowish brown. Head without pubescence on postero-lateral margins. Posterior angle of pronotum rectangular. Elytra (Fig. 34) widest at middle, posterior margin broadly rounded. Posterior part of mesoventrite (Fig. 36) slightly acute. Median lobe of aedeagus (Figs 53-55) slender, shorter than paramere; apical part acute; sperm-groove as in Fig. 54. Paramere (Figs 53, 55) nearly straight, long setae present on lateral and apical parts; apical part rounded. Apical margin of gonocoxa (Fig. 57) broadly rounded.

Distribution.

Europe, Asia; Korea, China (Liaoning), Cyprus, Iran, Iraq, Israel, Japan, Kazakhstan, Russia (East Siberia, Far East, West Siberia), Syria, Turkey, Uzbekistan ( Mazzoldi 2003).