Eurypogon granulatus 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 : 474

Eurypogon granulatus Sakai, 1982

( Figs 4A, B ; 8D, E ; 10G, H ; 12G )

Eurypogon granulatus Sakai, 1982: 57 .

Type locality. “Tsuifen, Nantou Hsien, Central Taiwan ” [ Taiwan, Nantou County, Tsuifeng , ca. 24°06′N 121°12′E].

Type material. Holotype male ( EUMJ), labeled: “ Tsuifen , Nantou-Hsien, FORMOSA, 4 v 1979, S.TSUYUKI leg.” // “ Holotype Eurypogon granulatus Sakai 1982 ”. Four paratypes [not studied by us]: two males, two females ( EUMJ).

Additional material examined. TAIWAN: NANTOU: 1 male, Tsuifeng, 25.IV.1999, Y.-Y. Lien leg. ( NMPC) . TAICHUNG: 1 female, Tashüehshan Mts. , Anmashan, 2230 m, 15. VI .1989, M. Satô leg. ( NMPC).

Diagnosis. This species can be easily recognized based on the distinctly granulated rough surface of interstices between puncture rows on elytra ( Fig. 10G, H ), relatively large elytral punctures, and slender, relatively thin median lobe ( Figs 12G ).

Sexual dimorphism and variability. Males are relatively narrower and more elongate than females, being about 2.8 times as long as wide (excluding head), while females are more robust, being about 2.4 times as long as wide (excluding head; Fig. 4A, B ). Males have longer and more serrate antennae, and less robust and relatively slightly shorter pronotum ( Fig. 8D, E ). For more information, see Sakai (1982). We found the difference between a male and a female in the relative size of punctures on elytra ( Fig. 10G, H ); however, more specimens of both sexes should be studied to understand if this is a sexual dimorphism or intraspecific variability.

Distribution. This species is endemic to Taiwan, being known from several mountainous localities across the island ( Fig. 15 ).

Figures

FIGURE 4. Habitus images of Eurypogon spp., dorsal view A. Eurypogon granulatus Sakai, 1982, male; B. Eurypogon granulatus Sakai, 1982, female; C. Eurypogon brevipennis Sakai, 1982, female; D. Eurypogon hisamatsui Sakai, 1982, female. Scale bars = 3.0 mm.

FIGURE 8. Pronotum images of Eurypogon spp., dorsal view. A. Eurypogon schuhi Packova & Kundrata, 2023, holotype male; B. Eurypogon sanzang Wang & Liu, 2021, male; C. Eurypogon turnai sp. nov., holotype male; D. Eurypogon granulatus Sakai, 1982, male; E. Eurypogon granulatus Sakai, 1982, female; F. Eurypogon brevipennis Sakai, 1982, female. 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).