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).