Capreolucanus, Didier, 1928

Qi, Zhi-Hao, Zhou, Zheng, Su, Rong-Xiang, Duan, Lei, Zhang, Yi-Feng & Song, Hai-Tian, 2024, Capreolucanus yanxui Qi & Zhou, new species, the third species of the genus from Yunnan (China) based on morphological and molecular characters (Coleoptera: Lucanidae: Lucaninae), Zootaxa 5433 (3), pp. 301-320 : 316-318

Key to males of Capreolucanus

1. Bicolor species, pronotum black to brown with two distinct cross-like orange red stripes flank midline, all femurs orange red in about apical third ( Fig. 1G ); mentum subtriangular ( Fig. 1I )............................... C. zhuchuangi Wang, 2020

- Monochromatic species, pronotum black to brown without stripes, all femurs black ( Fig. 1A, D ); mentum not subtriangular ( Fig. 3M–R )......................................................................................... 2

2. Head with a pair of rounded anterolateral angles; when dorsal tooth present, mandible with two dorsal teeth, smaller one subapical and larger one near dorsal base ( Fig. 2C ); mentum without notched at anterior margin ( Fig. 3P–R ); flagellum usually about 6.0 times as long as aedeagus ( Fig. 5D–F )............................................ C. sicardi Didier, 1928

- Head with a pair of triangular anterolateral angles; when dorsal tooth present, mandible only with one dorsal tooth behind the apex ( Fig. 2A–B ); mentum with anterior margin distinct notched ( Fig. 3M–O ); flagellum usually about 10.0 times as long as aedeagus ( Fig. 5A–C )....................................................... C. yanxui Qi & Zhou , new species

Key to females of Capreolucanus

1. Bicolor species, pronotum black to brown with two cross-like orange red stripes flank midline, all femurs orange red in about apical third ( Fig. 7G ); mentum subtriangular ( Fig. 7I )................................... C. zhuchuangi Wang, 2020

- Monochromatic species, pronotum black to brown without stripes, all femurs black ( Fig. 7A, D ); mentum not subtriangular ( Fig. 8M–R )......................................................................................... 2

2. Canthus less developed, dividing about 1/6 of the eye ( Fig. 8C–F ); mentum with rounded apex ( Fig. 8O–R ); outer margin of hemisternite membranous at middle, base of the outer margin thickening of sclerotization and extension backward obviously ( Fig. 9N, S )......................................................................... C. sicardi Didier, 1928

- Canthus more developed, dividing about 1/4 of the eye ( Fig. 8A–B ); mentum subtrapezoidal ( Fig. 8M–N ); outer margin of hemisternite sclerotized at middle, base of the outer margin not thickening and extension obviously ( Fig. 9D, I )................................................................................... C. yanxui Qi & Zhou , new species

Figures

FIGURE 1. Male habitus of Capreolucanus species. A–C, C. yanxui Qi & Zhou, new species (holotype, 18.6 mm, Pingbian, Yunnan, China); D–F, C. sicardi Didier, 1928 (18.9 mm, Lushui, Yunnan, China); G–I, C. zhuchuangi Wang, 2020 (15.0 mm, Bo Kluea, Nan, Thailand, Photo by Wuttipon Pathomwattananurak). A, D, G, dorsal view; B, E, H, lateral view; C, F, I, ventral view. Scale bar = 10.0 mm.

FIGURE 2. Male head details of Capreolucanus species in dorsolateral view. A–B, C. yanxui Qi & Zhou, new species; A, holotype; B, paratype; C–D, C. sicardi Didier, 1928; A, C, large sized; B, D, small sized.

FIGURE 3. Male canthus (A–F), clypeolabrum (G–L) and mentum (M–R) of Capreolucanus species. A–C, G–I, M–O, C. yanxui Qi & Zhou, new species; A, G, M, holotype; B–C, H–I, N–O, paratypes; D–F, J–L, P–R, C. sicardi Didier, 1928. A–L, dorsal view; M–R, ventral view. Scale bar = 0.2 mm.

FIGURE 5. Aedeagus of Capreolucanus species in ventral view. A–C, C. yanxui Qi & Zhou, new species. A, holotype; B–C, paratypes; D–F, C. sicardi Didier, 1928. Scale bar = 1.0 mm.

FIGURE 7. Female habitus of Capreolucanus species. A–C, C. yanxui Qi & Zhou, new species (paratype, 19.4 mm, Pingbian, Yunnan, China); D–F, C. sicardi Didier, 1928 (19.0 mm, Yingjiang, Yunnan, China); G–I, C. zhuchuangi Wang, 2020 (16.8 mm, Bo Kluea, Nan, Thailand, photo by Wuttipon Pathomwattananurak). A, D, G, dorsal view; B, E, H, lateral view; C, F, I, ventral view. Scale bar = 10.0 mm.

FIGURE 8. Female canthus (A–F), clypeolabrum (G–L), and mentum (M–R) of Capreolucanus species. A–B, G–H, M–N, C. yanxui Qi & Zhou, new species (paratypes); C–F, I–L, O–R, C. sicardi Didier, 1928. A–L, dorsal view; M–R, ventral view. Scale bar = 0.2 mm.

FIGURE 9. Female abdominal tergite VIII (A, F, K, P), abdominal ventrite VIII (B, G, L, Q) and genitalia (C, H, M, R) including details of hemisternite (D, I, N, S), spermatheca and spermathecal gland (E, J, O, T) of Capreolucanus species. A–J, C. yanxui Qi & Zhou, new species (paratypes); K–T, C. sicardi Didier, 1928. A, F, K, P, dorsal view; B–E, G–J, L–O, Q–T, ventral view. Scale bar for E, J, O, T = 0.2 mm, for the others = 1.0 mm.