Holopsis punctipennis Matthews, 1899

Furukawa, Kota, 2012, A Revision of the Genus Holopsis Broun (Insecta: Coleoptera: Corylophidae) from Japan, Species Diversity 17 (2), pp. 177-186 : 178-179

Holopsis punctipennis Matthews, 1899

( Figs 1A–B , 2A–F , 3A–G )

Corylophodes punctipennis Matthews, 1899: 150 .

Holopsis punctipennis Bowestead, 2003: 944 .– Löbl and Smetana 2007: 631.

Type material. [ Corylophodes punctipennis Matthews (1899) ] Lectotype: female, Ichiuchi , Japan ( BMNH). Paralectotype: 1 specimen ( BMNH) (not examined) .

Specimens examined. [ Shikoku ] Tokushima Prefecture: 11 specimens, Mt . Takamaru, Kamikatsu town , 26 May 2010, K . Furukawa leg . Ehime Prefecture: 17 specimens, Mt . Takanawa, Matsuyama city, 30 May 2010, K . Furukawa leg .; 6 specimens, Mt. Ishizuchi, Kumakôgen-town , 2 June 2010, K . Furukawa leg .

Diagnosis. This species is very similar to the other species of Holopsis in Japan in the external morphology, but the wavy lines on the metaventrite are slightly more distinct than those of the other species. The elongate 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. kirejtshuki Bowestead, 2003 , but are nonetheless reliable characters to distinguish the present species from H. kurilensis Bowestead, 2003 , H. lewisei Bowestead, 2003 , and H. ryukyuensis sp. n.

Description. Length 1.18–1.48 mm; width 0.87– 1.13 mm. Dorsal surface almost entirely dark brown to black; anterior margin of pronotum yellow, turning transparent towards edges; ventral surface dark brown to black with pale to black hypomeron; mouth parts and legs pale brown; antennae pale brown with 3 apical segments slightly darker ( Fig. 1A–B ).

Body nearly circular, strongly convex, 1.3–1.4 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 ( Figs 1A–B , 2A ). Antennomere 3 very elongate; antennomeres 4, 6, 7, and 8 transverse; antennomere 5 slightly elongate; antennomere 11 apically pointed ( Fig. 3A ). Labrum rectangular and slightly emarginate medially, with rounded apical angles ( Fig. 2E ). Labium rectangular with pentagonal ridge ( Fig. 2E ). Pronotum with entirely rounded anterior margin; punctures dense and fine in very shallow depressions, with fine and short pubescence; interspaces smooth and shining ( Fig. 2A–B ). Scutellum transverse with slightly rounded sides ( Fig. 2B ). Elytra widest about 1/3 from base; punctures dense in shallow depressions, with fine and short pubescence; interspaces smooth and shining; sutural striae absent ( Fig. 2A–B ). 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 long wavy lines ( Figs 2D , 3C ). Wings functional.

Penis as shown in Fig. 3D–E : 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. 3F : phallobase tapering sharply in basal half and near apex, with pointed apex.

Bursa copulatrix ( Fig. 3G ) without apical spines. Spermathecal duct ( Fig. 3G ) thicker in basal part, entering outer side of sperm duct lobe. Spermatheca as shown in Fig. 3G : habitus winding; body slightly swollen and fused with gland duct lobe, with large membranous patch; gland duct lobe very long, slender, winding in basal half, straight in apical half; sperm duct lobe elongate, rounded at apex; gland duct entering outer side of body of spermatheca.

Distribution. Japan: Honshu, Shikoku.

Biology. This species was captured on polypores in large numbers.

Remarks. The prior descriptions of this species were based only on female specimens ( Matthews 1899; Bowestead 2003). The morphology of the male, including its aedeagus, is herein shown 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. 2. H. punctipennis (SEM photographs). A, habitus, dorsal view; B, near scutellum, dorsal view; C, apical part of elyton, dorsal view; D, head to metaventrite, vental view; E, head, ventral view; F, abdomen, ventral view.

Fig. 3. H. punctipennis Matthews. A, antennae, ventral view; B, protibia of male, ventral view; C, metaventrite of male, ventral view; D, penis, ventral view; E, ditto, lateral view; F, tegmen, dorsal view; G, bursa copulatrix, spermathecal duct and spermatheca, dorsal view.