Eurypogon jaechi Kundrata, Bocakova, and Bocak, 2013

Yoshitomi, Hiroyuki, 2018, Description of the Male of Eurypogon jaechi Kundrata, Bocakova, and Bocak (Coleoptera: Artematopodidae), The Coleopterists Bulletin 72 (2), pp. 246-248 : 247-248

Eurypogon jaechi Kundrata, Bocakova, and Bocak, 2013

( Figs. 1–18 )

Description of Male. External features ( Figs. 1–2 ) similar to those of female (Kundrata et al. 2013). Antenna ( Fig. 5 ) long and slender, filiform, as long as TL; approximate ratios of antennomere (n = 1) 2.2:1.2:1.0:2.4:3.1:3.2:3.4:3.6:3.6:3.4:4.2. Abdominal ventrites II–IV lacking glandular setae. Sternite VII ( Fig. 6 ) lacking glandular setae, arcuate in caudal margin. Tergite VIII ( Fig.7 ) well-sclerotized, trapezoidal, bearing long setae posterolaterally, covered with minute spines and punctures, with a slender, short apodeme in each anterolateral corner. Sternite VIII ( Fig. 8 ) slightly sclerotized, fan-shaped, bearing short and long setae posteriorly. Tergite IX ( Fig. 9 ) moderately sclerotized, posterior margin deeply emarginate, bearing long setae posterolaterally, with a short, slender apodeme in each anterolateral corner. Tergite X ( Fig. 9 ) connected with tergite IX apically; margin arcuate, bearing short setae, sparsely punctate. Sternite IX ( Fig. 10 ) oblong, moderately sclerotized, bearing relatively long setae apically, with slender, basal apodemes bilaterally. Tegmen ( Figs. 11–13 ) long, well-sclerotized, ventrally setose, punctate apically, with V-shaped median anterior projection; parameres relatively wide, each obtuse apically. Penis ( Figs. 14–18 ) long, about 1.2X length of tegmen, slightly tapered apically, with spinous membrane (probably endophallus) situated dorsally. Measurements and Ratios. Male (n = 6): TL 4.50–5.30 (4.94) mm; PW 1.18–1.60 (1.41) mm; PL 0.90–1.05 (0.97) mm; EL 3.60–4.30 (3.97) mm; EW 1.70–2.20 (1.95) mm; PW/PL 1.31–1.55 (1.45); EL/EW 1.90–2.27 (2.05); EL/PL 3.90–4.30 (4.11); EW/PW 1.26–1.54 (1.39); TL/EW 2.35–2.82 (2.54). Female (n = 4): TL 5.45–5.95 (5.64) mm; PW 1.70–1.90 (1.78) mm; PL 1.10–1.20 (1.14) mm; EL 4.35–4.75 (4.50) mm; EW 2.20–2.55 (2.35) mm; PW/PL 1.48–1.64 (1.56); EL/EW 1.83–2.05 (1.92); EL/PL 3.83–4.09 (3.96); EW/PW 1.25–1.41 (1.32); TL/EW 2.31–2.55 (2.40).

Specimens Examined. Three males (3BF: Fig. 1 ; 1 male dissected with genitalia examined) and 3 females (2BF: Fig. 3 and 1 DF; 1 female dissected with genitalia examined): “ China: Yunnan Dadi 01. VII. 2014. Leg. Y. - T. Wang ”; 3 males (1BF and 2DF: Fig. 2; 1 male dissected with genitalia examined) and 1 female (1DF: Fig. 4 ): “ China: Yunnan Ludian 03. VII. 2014. Leg. Y.- T. Wang”; 1 male (1BF): “ China: Yunnan Yulongueshan 05. VII. 2014. Leg. Y.-T. Wang”.

Lawrence, J. F. 2005. Brevipogon , a new genus of North American Artematopodidae (Coleoptera) , with a key to world genera.The Coleopterists Bulletin 59: 223–236.

Lawrence, J. F. 2010. 4.2. Artematopodidae Lacordaire, 1857 [pp. 42–47]. In: Handbook of Zoology,Volume 4/39: Coleoptera, Beetles, Volume 2. Morphology and Systematics (Elateroidea, Bostrichiformia, Cucujiformia partim). (R. A. B. Leschen, R. G. Beutel, and J. F. Lawrence, editors). W.DeGruyter, Berlin, Germany.

Remarks. The two Chinese species of Eurypogon are easily recognized from the other species of the genus in having a metallic elytral luster (Kundrata et al. 2013). In addition, the male of E. jaechi differs from the Japanese and Taiwanese species by the following characteristics: 1) antennae long and slender; 2) parameres wide, bearing ventral spines; 3) penis relatively wide, slightly tapered posteriorly.

Sakai, M. 1982. Occurrence of the genus Eurypogon Motschulsky in Japan and Taiwan ( Coleoptera : Artematopidae ). Transactions of the Shikoku Entomological Society 16: 51–61.

Additional specimens examined during this study have elytral color variation (metallic blue ( Figs. 1, 3 ) to dull metallic ( Figs. 2, 4 )) and variable body shape (wider ( Figs. 1, 3, 4 ) to narrower ( Fig. 2 )). I concluded that these are infraspecific variations on the basis of the examination of male and female genitalia. Eurypogon jaechi is similar to Eurypogon heishuiensis Kundrata, Bocakova, and Bocak, 2013 collected sympatrically, but differs from it by the pronotal shape and the punctures on head and pronotum (Kundrata et al. 2013).

Figures

Figs. 1–4. Eurypogon jaechi. 1, 2) Male; 3, 4) Female. Scale bar = 1.0 mm.

Figs. 5–18. Eurypogon jaechi. 5) Male antenna; 6) Sternites V–VII; 7) Tergite VIII; 8) Sternite VIII; 9) Tergite IX; 10) Sternite IX; 11) Tegmen, ventral view; 12) Tegmen, dorsal view; 13) Tegmen, lateral view; 14) Penis, dorsal view; 15) Penis, ventral view; 16) Penis, lateral view; 17) Penis, ventral view; 18) Surface of endophallus.