Holopsis kurilensis Bowestead, 2003

Furukawa, Kota, 2012, A Revision of the Genus Holopsis Broun (Insecta: Coleoptera: Corylophidae) from Japan, Species Diversity 17 (2), pp. 177-186 : 181-183

Holopsis kurilensis Bowestead, 2003

( Figs 1D , 5A–F )

Holopsis kurilensis Bowestead, 2003: 947 . – Löbl and

Smetana 2007: 631.

Type material. Holotype: female, Kurile Islands , Russia ( ZIN) . Paratypes: 16 specimens, same data as holotype ( ZIN); 1 specimen, same data as holotype but collected by other person ( ZIN); 2 specimens, Primorsky, Russia ( ZIN); 2 specimens, Khabarovsk Province, Russia ( SMNS) (not examined).

Specimens examined. [Hokkaido] 10 specimens, Kawayu, Teshikaga town, 22–27 July 1970, M. Sakai leg.; 1 specimen, Takino, Sapporo city, 9 August 2009, K. Furukawa leg.; Oyafuru, Ishikari city, 18 May 2008, K. Furukawa leg.; 1 specimen, Mt. Kenashi, Otaru city, 16 June 2009, K. Furukawa leg.; 1 specimen, Mitsumata, Kamishihoro town, 15 August 2008, K. Furukawa leg. [Honshu] Yamanashi Prefecture: 2 specimens, Lake Saiko, Kawaguchiko town, 9 May 2005, Y. Sato leg.; Fukui Prefecture: Nakaikemi, Tsuruga city, 23 July 2009, K. Furukawa leg. [Shikoku] Ehime Prefecture: 2 specimens, Komenono, Matsuyama city, 19–24 April 1977, A. Oda leg. [Tsushima Island] 8 specimens, Kamisaka, Izuhara town, 15 July 1995, K. Aita leg.

Diagnosis. This species is very similar to the other species of Holopsis in Japan in its external morphology. Its penis with a bow-tie-shaped sclerite and its spermatheca with a swollen sperm duct lobe and a very long and slender gland duct lobe are the most reliable characters by which to identify this species.

Description. Length 1.30–1.41 mm; width 0.95– 1.02 mm. Dorsal surface almost entirely dark brown to black, usually paler near elytral suture; anterior margin of pronotum yellow, turning transparent towards edges; ventral surface brown to dark brown with pale to dark brown hypomeron; mouth parts and legs pale brown; antennae pale brown with 3 apical segments slightly darker ( Fig. 1D ).

Body nearly circular, strongly convex, 1.30–1.4 times as long as wide; pronotum 0.4 times as long as wide; elytra 1.0× as long as wide, 2.8–3.2 times as long as pronotum, 1.2 times as wide as pronotum. Antennomere 3 very elongate; antennomere 4 nearly square; antennomere 6, 7, and 8 transverse; antennomere 5 slightly elongate; antennomere 11 apically pointed. Labrum rectangular and slightly emarginate medially, with rounded apical angles. Labium rectangular with pentagonal ridge. Pronotum with entirely rounded anterior margin; punctures dense and fine in very shallow depressions, with fine and short pubescence; interspaces smooth and shining ( Fig. 5A ). Scutellum transverse with slightly rounded sides ( Fig. 5A ). Elytra widest about 1/3–2/5 of way from base; punctures dense in shallow depressions, with fine and short pubescence; interspaces smooth and shining; sutural striae absent ( Fig. 5A ). Metaventrite about 0.5 times as long as wide; metaventrite of male with longitudinally oval median depression; punctures fine and dense medially, sparse laterally, with fine pubescence; interspaces with transverse wavy lines, these becoming longer laterally ( Fig. 5B ). Wings functional.

Penis as shown in Fig. 5C–D : in ventral view broad with gently pointed apex; in lateral view arched evenly, with pointed apex; internal armature with symmetrical, bow-tieshaped sclerite and winding tube. Tegmen as shown in Fig. 5E : phallobase triangular with rounded apex.

Bursa copulatrix ( Fig. 5F ) without apical spines. Spermathecal duct ( Fig. 5F ) thicker in basal part, entering outer side of sperm duct lobe. Spermatheca as shown in Fig. 5F : habitus entirely winding and sinuous, very long; body slightly swollen and fused with gland duct lobe, with elongate membranous patch; gland duct lobe very long, very slender, sinuous; sperm duct lobe kidney-shaped, annulat- ed in apical part; gland duct entering outer side of body of spermatheca.

Distribution. Japan: Hokkaido, Honshu, Shikoku, Tsushima; Russia: Primorsky, Khabarovsk, Kurile Islands.

Remarks. This species had until now been recorded only in the Russian Far East ( Bowestead 2003), and its occurrence in Japan is confirmed herein for the first time.

Figures

Fig. 1. Habitus of Holopsis spp. A, B, H. punctipennis Matthews, male; C, H. kirejtschuki Bowestead, male; D, H. kurilensis Bowestead, male; E, H. lewisei Matthews, male; F, H. ryukyuensis sp. n., male: A, C, D, E, F, dorsal view; B, lateral view.

Fig. 5. H. kurilensis Bowestead. A, near scutellum, dorsal view (SEM photograph); B, metaventrite of male, ventral view; C, penis, ventral view; D, ditto, lateral view; E, tegmen, dorsal view; F, bursa copulatrix, spermathecal duct, and spermatheca, dorsal view.