Doryscus scapus Mohamedsaid, 1999

Lee, Chi-Feng, 2017, Revision of the genus Doryscus Jacoby (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4269 (1), pp. 1-43 : 38-39

Doryscus scapus Mohamedsaid, 1999

( Figs 20 B–20C, 22)

Doryscus scapus Mohamedsaid, 1999: 101 .

Type. Paratype ♀ ( UKM): “ SABAH, Kinabalu Park, / H.Q.- Power Station / (1700m) night / 3.X, 1987 / Gunik Gunsalam leg. [p, w] // PARATYPE [p] / Doryscus / scapus n. sp [h] / des. Mohamedsaid 199 [p] 8 [h, w, with red border]”.

Additional specimens (n= 2). MALAYSIA. Sabah: 1♂ ( NHMB), Km 53 Road KK-Tabunan, E slope Gn. Emas, 700 m, 1–5.IV.2000, Bolm ; 1♀ (NHMB), Km 53 Road KK-Tabunan, Gn. Emas, 1650 m, 22.III.–6.IV.2000, Bolm.

Redescription. Length 4.0– 4.8 mm, width 1.6–1.8 mm. General color yellow brown; antennae dark brown; pronotum with one median, longitudinal, wide dark band; elytra with subapical and sub-basal transverse, illdefined, dark stripes ( Fig. 20 B) that are sometimes reduced. Antennae filiform, antennomere I strongly swollen in males ( Fig. 22 A), length ratios of antennomeres I–XI 1.0: 0.3: 0.6: 0.7: 0.6: 0.6: 0.7: 0.6: 0.6: 0.6: 0.7, length to width ratios of antennomeres I–XI 2.3: 2.0: 3.4: 4.1: 3.9: 4.1: 4.6: 4.3: 4.1: 3.8: 4.4; antennomere I normal in females ( Fig. 22 B), length ratios of antennomeres I–XI 1.0: 0.3: 0.6: 0.7: 0.7: 0.7: 0.8: 0.8: 0.8: 0.7: 0.9; length to width ratios of antennomeres I–XI 4.6: 1.8: 3.3: 4.1: 4.2: 4.3: 4.4: 4.4: 4.4: 4.2: 5.0. Elytra 1.8 x longer than wide, disc with erect setae dense and elongate, and fine punctures. Apical margin of last abdominal ventrites with two shallow incisions in males ( Fig. 22 G); slightly medially depressed in females ( Fig. 22 H). Penis ( Figs 22 C–22D) slender, 8.9 x longer than wide, gradually narrowed towards apex; apex of dorsal surface with moderately deep notch, below apex of ventral surface; apex of ventral surface with shallow notch; straight in lateral view, deep notch between dorsal and ventral surface; ventral surface smooth. Internal sac with endophallic spiculae short, about 0.4 x as long as penis, main spicula recurved and with a cluster of setae at apical 1/4; two pairs of elongate spiculae at middle basally joined, apices swollen and sphere-shaped; one pair of elongate spiculae at basal 1/6, apices horn-like and curved dorsally in lateral view; one pair of oblique and short spiculae at base, apices hornlike and curved ventrally in lateral view. Gonocoxae ( Fig. 22 E) extremely slender, 6.9 x longer than wide, sides slightly narrowed at apical 1/10; apices narrowed rounded; inner margins narrowly approximate from apex to midpoint, apex with nine setae; extremely slender from midpoint to base but abruptly widened at base. Ventrite VIII ( Fig. 22 E) well sclerotized; spiculum elongate; apex square, apical margin truncate, with dense short setae; disc with several long setae at sides. Receptacle of spermatheca ( Fig. 22 F) as wide as pump, narrowly separated from pump; pump strongly curved and not apically narrowed; proximal spermathecal duct elongate, shallowly projecting into receptaculum.

Color variability. Females have yellow bodies and a wide, transverse black band on the base of the elytra ( Fig. 20 C).

Differential diagnosis. See diagnosis of Doryscus wangi sp. nov. Distribution. East Malaysia (Sabah).

Figures

FIGURE 20. Habitus of Doryscus species, dorsal view. 20 A. D. sumatrensis Lee, sp. nov.; 20 B. D. scapus Mohamedsaid, male; 20 C. D. scapus Mohamedsaid, female; 20 D. D. wangi Lee, sp. nov.; 20 E. D. wangi Lee, sp. nov., color variation.

FIGURE 22. Diagnostic characters of Doryscus scapus Mohamedsaid. 22 A. Antenna, male; 22 B. Antenna, female; 22 C. Penis, dorsal view; 21 D. Penis, lateral view; 22 E. Gonocoxae; 22 F. Abdominal ventrite VIII. 22 G. Apical margin of abdominal ventrite V, male; 22 H. Apical margin of abdominal ventrite V, female; 22 I. Spermatheca.