Cephalobyrrhus latus Pic, 1923

Yoshitomi, Hiroyuki, 2019, Revision of the genus Cephalobyrrhus of Japan and Taiwan (Coleoptera, Limnichidae), ZooKeys 817, pp. 61-72 : 63

Cephalobyrrhus latus Pic, 1923 Figs 1A, 2E, 3 A–G

Cephalobyrrhus latus : Pic 1923: 4; Champion 1925: 174; Satô 1965: 123; Pütz 1991: 132; 1998: 357.

Specimens examined.

1 ex. (SEHU), Alishan Chiayi, 4-5. VII. 1975, H Takizawa leg.; 1 ex. (SEHU), Fenchihu, Nantou, 11-12.VII.1981, H Takizawa leg.; 4 exs. (EUMJ), same loc., 7.VII.1961, S Ueno leg.; 2 exs. (EUMJ), Fushan, Taipei Hsien, 12.IV.1999, Y-Y Lien leg.; 5 exs. (TARI), same loc., 30.III.2012, C-F Lee leg.; 1 ex. (EUMJ), Hsileng, Taoyuan Hsien, 3.V.1981, S Tsuyuki leg.; 1 ex. (EUMJ), Kuanshan, Yakou, Taichung Hsien, 2,600 m, 11.VI.1989, M Satô leg.; 4 exs. (EUMJ), Liyuan (1800-1900 m), Haiduan, Taichung Hsien, 5.VI.2013, K Sonaka leg.; 1 ex. (EUMJ), Mt. Lala, Taoyuan Hsien, 30.IV.1979, S Tsuyuki leg.; 1 ex. (EUMJ), same loc., 2.V.1981, S Tsuyuki leg.; 1 ex. (TARI), Nantou, Tatachia, 6-12.V.2008, C-S Tung leg.; 17 exs. (EUMJ), Nihonmatsu-Hokuko, Byoritsu-ken, 10.IV.1967, T Shirozu leg.; 1 ex. (EUMJ), Oiwake, 24.VI.1961, T Shirozu leg.; 25 exs. (EUMJ), Paolai, Kaosiung Hsien, 11.VI.1989, M Satô leg.; 3 exs. (EUMJ), Sihling-Sicun, Taoyuan Hsien, 19.IV.2007, S-T Hisamatsu leg.; 1 ex. (EUMJ), Sungkang-Meifeng, Nantou Hsien, 19.V.1969, S Hisamatsu leg.; 5 exs. (EUMJ), Tsuifeng, Nantou Hsien, 18.VI.1989, M Satô leg.; 4 exs. (SEHU), Tungpu Chiayi, 14-17.VII.1976, H Takizawa leg.; 4 exs. (EUMJ), Wulai, Taipei Hsien, 4.V.1968, Y Watanabe leg.; 4 exs. (EUMJ), same loc., 17.V.1972, M Sakai leg.

Description.

For full description see Pütz (1998). Antennae (Fig. 2E) long, approximate ratio of each antennomere (n = 1) as 2.20: 1.40: 2.60: 1.80: 1.80: 1.60: 1.40: 1.40: 1.20: 1.00: 1.80. PW/PL 1.57-2.10 (1.79); EL/EW 1.46-1.71 (1.55); EL/PL 3.00-4.29 (3.47); EW/PW 1.17-1.33 (1.24); TL/EW 1.92-2.13 (2.00). Legs reddish brown, but frequently infuscate.

Male. Sternite VIII (Fig. 3D) membranous, transverse. Sternite IX (Fig. 3E) with long and slender lateral struts. Aedeagus 0.6 mm; phallobase slightly tapering basally, with straight basal projection; parameres relatively wide, obtuse at apices, slightly arcuate in lateral sides, 0.42 times as long as phallobase; median lobe widened in basal 1/3, obtuse at apex, 0.88 times as long as parameres.

Female. Spiculum ventral (Fig. 3F) long, as long as ovipositor. Ovipositor (Fig. 3G) well sclerotized, long; coxite gently pointed at apices; approximate ratio of coxite and baculus (n = 1) as 1.0: 5.0.

Measurements of adults (unsexed; n = 20). TL 2.22-3.70 (3.04) mm; PW 0.88-1.50 (1.22) mm; PL 0.42-0.85 (0.69) mm; EL 1.80-2.85 (2.36) mm; EW 1.05-1.85 (1.52) mm.

Distribution.

Taiwan.

Remarks.

The male genitalia of the lectotype shown by Pütz (1998) were broken in the basal part.

Biological notes.

This species is common in Taiwan, and lives in a natural forest of a mountainous area. Immature stages are unknown.