Gamepenthes pictipennis (Lewis, 1894)

Arimoto, Koichi & Arimoto, Hisayuki, 2020, The genus Nipponodrasterius Kishii (Coleoptera, Elateridae, Agrypninae), a junior synonym of the genus Gamepenthes Fleutiaux (Coleoptera, Elateridae, Elaterinae), with review of the Japanese Gamepenthes species, ZooKeys 1004, pp. 109-127 : 109

Gamepenthes pictipennis (Lewis, 1894) Figures 1B , 2A-D , 3C, D , 4E , 5 , 6 , 7B

Melanoxanthus pictipennis Lewis, 1894: 48 (original description; type locality: Fukushima [Kisofukushima in Nagano Prefecture] and Nataksugawa [Nakatsugawa in Gifu Prefecture], Honshu, Japan).

Gamepenthes pictipennis (Lewis, 1894); Kishii 1959: 58 (changed generic status).

Gamepenthes pictipennis aberrant form mizunoi Kishii, 1968: 14 (original description; type locality: Tokugô-tôge Pass, Nagano Prefecture, Honshu, Japan).

Nipponodrasterius alpicola Kishii, 1966: 9 (original description; type locality: Sampuku-tôge Pass, Kashio, Ôshika Village, Shimoina District, Nagano Prefecture, Honshu, Japan). syn. nov.

Material examined.

Holotype of Nipponodrasterius alpicola . Male, Japan, Honshu, Nagano Prefecture, Shimoina District, Ôshika Village, Kashio, Sampuku-tôge Pass, 17-20, VII, 1956, H. Nitta leg. Verbatim label data (Fig. 5J ): " Nipponodrasterius / Nipponodrasterius alpicola / Kishii. 1966 / DET. T. KISHII. ‘66”; “HOLOTYPE”; "Sampuku pass / South Alps, Japan / July 17~20, 1956 / Coll. Nitta"; “2489”.

Non-type material.

1 male, Japan, Hokkaido, Uryû District, Horokanai Town, Syumarinai, 31 VII 1982, Koji Hosokawa leg. [GP001]; 1 female, Japan, Honshu, Gunma Prefecture, Ôsawa, 19 VII 1975, M. Yagi leg. [GP002]; 1 male, Japan, Honshu, Yamanashi Prefecture, Sudama Town, Masutomi spa, 9 VIII 1989, Yutaka Ishikawa leg. [GP003]; 1 female, same place as the former, 1300 m, 26 VII 1999, Yutaka Ishikawa leg. [GP004]; 1 female, same place as the former, ca 1300 m, base of the western end of the Okuchichibu Mountains, 18 VII 1990, Yutaka Ishikawa leg. [GP005]; 1 male, Japan, Honshu, Yamanashi Prefecture, Kôshû City, Enzan, Hikawa Forest Road, 20 VIII 1989, K. Shindô leg. [GP006]; 1 male, Japan, Honshu, Gifu Prefecture, Takayama City, Shôkawa Town, Oganigô, Ôkuro Valley, 30 VI 2007, Hisayuki Arimoto leg. [GP007]; 1 female, Japan, Honshu, Gifu Prefecture, Ôno District, Shôkawa Village, Ogamigô, 12 VIII 1995, N. Yuzawa leg. [GP008]; 1 male, Japan, Honshu, Nara Prefecture, Tenkawa Village, Tsubonouchi Forest Road, 1200m, 21 VII 2008, Hisayuki Arimoto leg. [GP009]; 1 male, 1 female, Japan, Honshu, Okayama Prefecture, Tomada District, Kagamino Town, Neji, 8-15 VII 2016, Akihiko Watanabe leg., by light FIT [male: GP0010; female: GP011]; 1 male, Japan, Kyushu, Ôita Prefecture, Toyogoôno City, Ogata Town, Mt. Furusobo-san, 30 VII 2017, Yûji Tsutsumiuchi leg. [GP012].

Diagnosis.

Body robust (EI: 222-244, BI: 209-247). Prothorax black; hind angles of pronotum yellow to orange in many, black in some. Each elytron with three separate yellow markings basally; basal markings connected in many, variably reduced in some. Antennomere II shorter than wide; antennomere III shorter than wide in male, slightly longer than wide in female; IV elongate (1.74-2.00 times longer than wide in male, 1.96-2.05 times longer than wide in female), longer than II-III combined (1.47-1.79 times as long as II-III combined in male, 1.21-1.40 times as long as II-III combined in female). Prosternal process weakly inclined dorsad (20-25°). Metacoxal plates narrowed outwards, with outer edge narrow. Apical edge of elytra rounded, without spines. Apex of parameres beyond pre-apical expansions widely triangular (apex length 0.1-0.2 times width of parameres at expansion).

Measurements.

Male (8 spec.). BL: 5.13-6.51; BW: 1.42-1.88; MAE: 0.903-1.10; MBE: 0.623-0.793; OI: 132-145; PL: 1.34-1.85; PML: 1.27-1.62; PAW: 0.937-1.13; PW: 1.37-1.76; PI: 101-111; PWI: 146-161; EL: 3.32-4.29; EW: 1.42-1.88; EI: 222-238; BI: 212-247. Female (5 spec.). BL: 5.65-7.25; BW: 1.55-1.96; MAE: 0.915-1.14; MBE: 0.653-0.856; OI: 133-140; PL: 1.61-2.11; PAW: 0.943-1.17; PML: 1.40-1.87; PW: 1.47-1.91; PI: 108-112; PWI: 155-163; EL: 3.57-4.72; EW: 1.55-1.96; EI: 228-244; BI: 209-237.

Distribution.

Japan: Hokkaido, Honshu, Shikoku, Kyushu. Russia: Kunashir Island. The specimen examined from Hokkaido [GP001] is from the northern limit of the distribution of the genus.

Figures

Figure 1. Gamepenthes spp., male, habitus, dorsal view A G. ornatus [GO 003] B G. pictipennis [GP 010] C G. similis [GS 003] D G. versipellis [GV 006] E G. yoshidai [GY 001].

Figure 2. Gamepenthes spp., color variation A G. pictipennis, male [GP 003] B G. pictipennis, male [GP 012] C G. pictipennis, male, holotype of Nipponodrasterius alpicola D G. pictipennis, female [GP 010] E G. versipellis, female [GV 007].

Figure 3. Gamepenthes spp. A-F right basal antennomeres G, H left metacoxal plate I, J apices of elytra A G. ornatus, male [GO 003] B G. ornatus, female [GO 009] C G. pictipennis, male [GP 010] D G. pictipennis, female [GP 011] E G. similis, male [GS 003] F G. similis, female [GS 006] G, I G. versipellis [GV 011] H G. pictipennis [GP 010] J G. pictipennis [GP 003].

Figure 4. Gamepenthes spp., head and prothorax A G. ornatus, male [GO 003] B G. ornatus, female [GO 002] C G. versipellis, male [GV 006] D G. versipellis, female [GV 007] E G. pictipennis, male [GP 010] F G. yoshidai, male [GY 001] A-D dorsal view E, F lateral view.

Figure 5. Holotype of Nipponodrasterius alpicola A head, anterior view B right basal antennomeres C hind angles of pronotum D prothorax, ventral view E prothorax, lateral view F mesosternum G apices of elytra H right metacoxal plate I left mid tarsus and claw J aedeagus K labels L aedeagus slide.

Figure 6. Gamepenthes pictipennis, male, apex of left paramere of aedeagus A, B [GP 006] C, D [GP 007] E, F [GP 009] G, H [GP 012] I, J holotype of Nipponodrasterius alpicola A, C, E, G, I dorsal side B, D, F, H, J ventral side.

Figure 7. Gamepenthes spp., male, aedeagus, ventral side A G. ornatus [GO 006] B G. pictipennis [GP 006] C G. similis [GS 008] D G. versipellis [GV 003] E G. yoshidai [GY 002].