Holopsis kirejtshuki Bowestead, 2003

Furukawa, Kota, 2012, A Revision of the Genus Holopsis Broun (Insecta: Coleoptera: Corylophidae) from Japan, Species Diversity 17 (2), pp. 177-186 : 179-181

Holopsis kirejtshuki Bowestead, 2003

( Figs 1C , 4A–F )

Holopsis kirejtshuki Bowestead, 2003: 946 .– Löbl and Smetana 2007: 631.

Type material. Holotype: female, Primorsky, Russia ( ZIN) . Paratypes: 3 males, same data as holotype ( ZIN); 1 male and 2 females, same data as holotype ( SBCC); 1 specimen, Vladivostok, Russia ( MZH) (not examined).

Specimens examined. [Shikoku] Ehime Prefecture: 8 specimens, Yoshinogawa, Oda town, 21 July 1993, A. Aita leg.; 2 specimens, Komenono, Matsuyama city, 17 April 1993, M. Kawanabe, K. Okada and K. Aita leg., 1 specimen, Shiratsue, Matsuyama city, 19 June 1968, S. Hisamatsu leg.; 2 specimens, Teppoishi, Omogo village, 28 May 1995, K. Aita leg. Kochi Prefecture: 5 specimens, Nagano, Yusuhara town, 6–8 May 1994, O. Utsunomiya, M. Kawanabe, and O. Fujimori leg.; Okuminamigawa Path – Irutani Path, Ino town, 22 May 2009, T. and S. Miyata leg. [Kyushu] Saga Prefecture: 2 specimens, Mt. Sefuri, Kanzaki city, 16–23 June 2010, S. Nomura et al. leg. Nagasaki Prefecture: 2 specimens, Mt. Yasuman, Hirado city, 5 May 1979, M. Sakai and A. Oda leg. [Tsuhima Island] 3 specimens, Mt. Ariake, Iduhara town, 11 May 1978, A. Oda leg. [Ryukyu Islands] 2 specimens, Mt. Yuwan, Amami-ôshima island, 19 April 1971, M. Sakai leg.

Diagnosis. This species is very similar to the other species of Holopsis in Japan in its external morphology. The swollen sperm duct lobe and the very long and slender gland duct lobe of the spermatheca are the most reliable characters with which to identify this species. Its slender penis with a long and forked sclerite and its tegmen with a pointed apex are similar to those of H. punctipennis , but these nonetheless are reliable character states for distinguishing this species from H. kurilensis , H. lewisei , and H. ryukyuensis .

Description. Length 1.15–1.41 mm; width 0.89– 1.09 mm. Dorsal surface almost entirely dark brown to black, but usually paler near elytral suture; anterior margin of pronotum yellow, turning transparent towards edges; ventral surface brown to black with pale to dark brown hypomeron; mouth parts and legs pale brown; antennae pale brown with 3 apical segments darker ( Fig. 1C ).

Body nearly circular, strongly convex, 1.3 times as long as wide; pronotum 0.4 times as long as wide; elytra 1.0 times 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, 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. 4A ). Scutellum transverse with slightly rounded sides ( Fig. 4A ). Elytra widest about 1/3 of way from base; punctures dense in shallow depressions, with fine and short pubescence; interspaces smooth and shining; sutural striae absent ( Fig. 4A ). 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 lines becoming longer laterally ( Fig. 4B ). Wings functional.

Penis as shown in Fig. 4C–D : in ventral view slender, with gently pointed apex; in lateral view arched evenly, with pointed apex; internal armature with symmetrical, long and forked sclerite and winding tube. Tegmen as shown in Fig. 4E : phallobase tapering sharply in basal half and near apex, with pointed apex.

Bursa copulatrix ( Fig. 4F ) without apical spines. Spermathecal duct ( Fig. 4F ) much thicker in basal part, entering outer side of sperm duct lobe. Spermatheca as shown in Fig. 4F : habitus entirely winding; body slightly swollen and fused with gland duct lobe, with membranous patch; gland duct lobe very long and slender; sperm duct lobe swollen; gland duct entering outer side of body of spermatheca.

Distribution. Japan: Shikoku, Kyushu, Tsushima, Ryukyu Islands (Amami-ôshima island); Russia: Primorsky.

Remarks. This species had been recorded only in the Russian Far East ( Bowestead 2003), but 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. 4. H. kirejtschuki 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.