Doryscus barclayi, Lee, Chi-Feng, 2017

Lee, Chi-Feng, 2017, Revision of the genus Doryscus Jacoby (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4269 (1), pp. 1-43 : 29-32

Doryscus barclayi sp. nov. ( Figs 16 A, 17)

Types (n= 5). Holotype ♂ ( BMNH): INDONESIA. Sulawesi Utara: Dumoga-Bone N. P., Tray 36, Fog 11, 230 m, 10.III.1985 , BMNH Plot A. Paratypes: 1♂ ( BMNH), same but with “ Tray 28” ; 1♀ ( BMNH), same locality, Tray 67, Fog 13, 230 m, 11.VII.1985 , BMNH Plot A; 1♀ ( BMNH), same locality, Plot A, ca 20 m, Lowland forest , Malaise trap up tree, 30.V.–6.VI.1985, 132.25 ; 1♀ ( BMNH), same locality, ‘ Clarke’ camp, Lower montane forest, 1140 m, III.1985, Wr. 132.25, 132.81.

Description. Length 3.7–5.2 mm, width 1.6–2.3 mm. General color yellowish brown ( Fig. 16 A). Antennae filiform, antennomere I not modified in males ( Fig. 17 A), length ratios of antennomeres I–XI 1.0: 0.4: 0.7: 0.6: 0.7: 0.7: 0.7: 0.7: 0.7: 0.7: 0.8, length to width ratios of antennomeres I–XI 2.9: 1.9: 2.9: 2.6: 3.0: 3.2: 3.6: 3.7: 3.6: 3.5: 4.5; narrower in females ( Fig. 17 B), length ratios of antennomeres I–XI 1.0: 0.4: 0.8: 0.8: 0.8: 0.8: 0.8: 0.8: 0.8: 0.7: 0.8, length to width ratios of antennomeres I–XI 3.8: 1.9: 3.8: 4.0: 4.0: 4.5: 4.6: 4.5: 4.3: 3.9: 5.0. Elytra 1.7 x longer than wide, with longitudinal ridges between punctures, with erect, yellowish brown, dense, elongate setae and coarse punctures. Apical margin of last abdominal ventrite with two extremely shallow incisions in males ( Fig. 17 G); but medially depressed in females ( Fig. 17 H). Penis ( Figs 17 C–17D) extremely slender, 7.7 x longer than wide, gradually widened towards base, apex of dorsal surface membranous; apex of ventral surface slightly depressed; straight in lateral view. Internal sac with endophallic spiculae short, about 0.6 x as long as penis, apices trilobed, median lobe extremely slender, strongly and dorso-ventrally curved at middle, with cluster of setae at middle, lateral lobes apically tapering, apices horn-like; with one pair of extremely elongate spiculae from base to midpoint, two pair of short, horn-like spiculae between elongate spiculae. Gonocoxae ( Fig. 17 E) slender, 6.2 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; slender from midpoint to base. Ventrite VIII ( Fig. 17 F) weakly sclerotized; spiculum elongate; apex square, apical margin truncate, with sparse short setae and several long setae inside; disc with several long setae at sides. Receptacle of spermatheca ( Fig. 17 I) narrower than pump, narrowly separated from pump; pump wide and strongly curved; proximal spermathecal duct slender, shallowly projecting into receptaculum.

Differential diagnosis. Doryscus barclayi sp. nov. adults are easily recognized by their longitudinal ridges on the elytra and comparatively wider antennae in males than females.

Etymology. This new species is dedicated to Maxwell V. L. Barclay (Curator, BMNH), who encouraged me to study leaf beetles.

Distribution. Indonesia (Sulawesi).

Figures

FIGURE 16. Habitus of Doryscus species, dorsal view. 16 A. D. barclayi Lee, sp. nov.; 16 B. D. boreri Lee, sp. nov.; 16 C. D. boreri Lee, sp. nov., color variation; 16 D. D. boreri Lee, sp. nov., color variation; 16 E. D. javanensis Lee, sp. nov.; 16 F. D. javanensis Lee, sp. nov., color variation.

FIGURE 17. Diagnostic characters of Doryscus barclayi Lee, sp. nov. 17 A. Antenna, male; 17 B. Antenna, female; 17 C. Penis, dorsal view; 17 D. Penis, lateral view; 17 E. Gonocoxae; 17 F. Abdominal ventrite VIII. 17 G. Apical margin of abdominal ventrite V, male; 17 H. Apical margin of abdominal ventrite V, female; 17 I. Spermatheca.