Eurypogon japonicus Sakai, 1982

Packova, Gabriela, Hájek, Jiří, Geiser, Michael & Kundrata, Robin, 2024, Taxonomic review of Palearctic Eurypogon Motschulsky (Coleoptera: Artematopodidae), with a redescription of the only European species and descriptions of three new species from China, Zootaxa 5437 (4), pp. 451-479 : 475-476

Eurypogon japonicus Sakai, 1982

( Figs 5A, B ; 9B,C ; 10K ; 12H )

Eurypogon japonicus Sakai, 1982: 52 .

Type locality. “Mt. Daisen, Tottori Pref. ” [ Japan, Honshu , Tottori Prefecture, Mt. Daisen, ca. 35°22′N 133°32′E].

Type material. Holotype male ( EUMJ), labeled: “DAISEN, TOTTORI, 23/ 27.V.1959, H. Yokoyama ”, “ Holotype Eurypogon japonicus SAKAI 1982 ”. 28 paratypes [not studied by us], nine males, 19 females (21 paratypes, eight males and 13 females in EUMJ).

Additional material examined. JAPAN: HONSHU: 2 males, Mie Pref., Hirakura, Misugi-mura [vill.] , 23. V.1993, H. Yoshitomi leg. ( NMPC); 2 males 1 female, Mie Pref., Myojindake , 22. VI.1993, H. Kawase leg. ( NMPC); 1 female, Gifu pref., Hiwada, Takane-mura [vill.], 6.VII.1994, H. Yoshitomi leg. ( NMPC); 1 male, Gunma Pref., Konuma, Mt. Akagi , 21. VI.1998, S. Tsuyuki leg. ( NMPC).

Diagnosis. This species can be recognized based on the following combination of characters: eyes almost as wide as the anterior margin of pronotum ( Figs 5A,B ; 9B,C ), pronotal punctation ( Fig. 9B,C ) very dense, with most punctures very close to each other, elytra together about 2.3 times as long as wide, the elytral surface ( Fig. 10K ) rather smooth and with mostly large punctures, and the median lobe ( Fig. 12H ) about 5.4–5.8 times as long as wide.

Sexual dimorphism. Females are more robust and relatively shorter than males, being about 2.4–2.5 times as long as wide (excluding head; about 2.7 times in males; Fig. 5A,B ). Females have shorter and less serrate antennae (serrations less acute) than males ( Sakai 1982).

Distribution. This is the most widespread Japanese Eurypogon , currently being known from Honshu, Shikoku, and Kyushu Islands ( Fig. 15 ).

Figures

FIGURE 5. Habitus images of Eurypogon spp., dorsal view. A. Eurypogon japonicus Sakai, 1982, male, dorsal view; B. Eurypogon japonicus Sakai, 1982, female, dorsal view; C. Eurypogon ocularis Sakai, 1982, male, dorsal view. Scale bars = 3.0 mm.

FIGURE 9. Pronotum images of Eurypogon spp., dorsal view. A. Eurypogon hisamatsui Sakai, 1982, female; B. Eurypogon japonicus Sakai, 1982, male; C. Eurypogon japonicus Sakai, 1982, female; D. Eurypogon ocularis Sakai, 1982, male. Scale bars = 1.0 mm.

FIGURE 10. Detail of left elytron of Eurypogon spp, dorsal view. A. Eurypogon cribratus (Hampe, 1867), male; B. Eurypogon pubescens sp. nov., holotype male; C. Eurypogon ruzickai sp. nov., holotype male; D. Eurypogon sanzang Wang & Liu, 2021, male; E. Eurypogon schuhi Packova & Kundrata, 2023, holotype male; F. Eurypogon turnai sp. nov., holotype male; G. Eurypogon granulatus Sakai, 1982, male; H. Eurypogon granulatus Sakai, 1982, female; I. Eurypogon brevipennis Sakai, 1982, female; J. Eurypogon hisamatsui Sakai, 1982, female; K. Eurypogon japonicus Sakai, 1982, male; L. Eurypogon ocularis Sakai, 1982, male. Not to scale.

FIGURE 12. Male genitalia of Eurypogon spp. A. Eurypogon cribratus (Hampe, 1867), dorsal and lateral view, respectively; B. Eurypogon pubescens sp. nov., dorsal and lateral view, respectively; C. Eurypogon ruzickai sp. nov., holotype, dorsal and lateral view, respectively; D. Eurypogon sanzang Wang & Liu, 2021, dorsal view; E. Eurypogon schuhi Packova & Kundrata, 2023, holotype, dorsal view; F. Eurypogon turnai sp. nov., holotype, dorsal and lateral view, respectively; G. Eurypogon granulatus Sakai, 1982, dorsal view; H. Eurypogon japonicus Sakai, 1982, dorsal view; I. Eurypogon ocularis Sakai, 1982, dorsal view. Scale bars = 0.5 mm.

FIGURE 15. Distributional map of Eurypogon spp. 1. E. ruzickai sp. nov.; 2. E. heishuiensis Kundrata et al. 2013; 3. E. jaechi Kundrata et al., 2013; 4. E. sanzang Wang & Liu, 2021; 5. E. pubescens sp. nov.; 6. E. turnai sp. nov.; 7. E. schuhi Packova & Kundrata, 2023; 8. E. granulatus Sakai, 1982; 9. E. japonicus Sakai, 1982; 10. E. brevipennis Sakai, 1982; 11. E. hisamatsui Sakai, 1982; 12. E. ocularis Sakai, 1982; 13. E. cribratus (Hampe, 1867).