Doryscus sumatrensis, Lee, Chi-Feng, 2017

Lee, Chi-Feng, 2017, Revision of the genus Doryscus Jacoby (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4269 (1), pp. 1-43 : 35-38

Doryscus sumatrensis sp. nov. ( Figs 20 A, 21)

Doryscus testaceus: Jacoby, 1896a: 498 . Misidentification

Types (n= 11). Holotype ♂ ( NHMB): INDONESIA. Sumatra: Gn Merapi , 5 km E of Kolobaru, 1600 m, 18– 25.V.2001, Bolm . Paratypes: 3♂♂, 2♀♀ ( NHMB), same data as holotype ; 1♀ (NHMB): Brastagi, G. Silbayak, 1450–1900 m, 19–23.II.1991, leg. Bocák & Bocáková; 1♀ ( NHMB): Gn Tujuh , 5 km E Kersik Dua, 1900 m, 3– 5.V.2001, Bolm ; 1♂, 1♀ ( NHMB): Jambi pr.: Kerinci Seblat N. P.; 7km E Kayuaro; Mt. Tujuh ; 1750± 250m; 1°45’S 101°25’E; 25.II.–2.III.2003, leg. Dembický ; 1♀ ( BMNH), Si-Rambe , XII.1890 – III.1891, leg. E. Modigliani, with another label: “Museo Civ. Genova”, identified as Doryscus testaceus by Jacoby.

Description. Length 3.5–5.0 mm, width 1.5–2.1 m. General color brown, sometimes lateral margins of pronotum darker ( Fig. 20 A). Antennae filiform, antennomere I not modified in males ( Fig. 21 A), length ratios of antennomeres I–XI 1.0: 0.4: 0.9: 0.8: 0.9: 1.0: 1.0: 0.9: 0.9: 0.8: 1.0, length to width ratios of antennomeres I–XI 3.1: 1.5: 3.3: 3.0: 3.2: 4.0: 4.1: 3.8: 3.8: 3.4: 4.1; narrower in females ( Fig. 21 B), length ratios of antennomeres I–XI 1.0: 0.4: 0.8: 0.9: 0.9: 1.0: 1.0: 0.9: 0.9: 0.9: 1.0, length to width ratios of antennomeres I–XI 3.4: 1.8: 3.4: 3.5: 3.8: 4.3: 4.6: 4.5: 4.4: 4.2: 4.9. Elytra 1.7 x longer than wide, with brown, dense, elongate setae; and fine punctures. Apical margin of last abdominal ventrites with two extremely shallow incisions in males ( Fig. 21 G); but almost straight in females ( Fig. 21 H). Penis ( Figs 21 C–21D) extremely slender, 10.0 x longer than wide, parallel-sided, apex of dorsal surface with moderately deep notch; notch on apex of ventral surface shallow; straight in lateral view, apex with groove between dorsal and ventral surface; ventral surface smooth. Internal sac with endophallic spiculae elongate, about 0.8 x as long as penis, apices trilobed, median lobe slender, strongly and medially curved and then recurved, with cluster of setae at middle, laterallye elongate with apices rounded; three pairs of elongate and anteriorly tapering spiculae at middle; a row of tiny setae along lateral margin near base to midpoint. Gonocoxae ( Fig. 21 E) extremely slender, 9.0 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. 21 F) well sclerotized; spiculum elongate; apex square, apical margin truncate, with sparse short setae; disc with several long setae at sides. Receptacle of spermatheca ( Fig. 21 I) strongly swollen; pump much narrower and strongly curved, apically tapering; proximal spermathecal duct slender, strongly widened at base, deeply projecting into receptaculum.

Differential diagnosis. Doryscus boreri sp. nov. is characterized by the long longitudinal and lateral of rows of tiny setae of the endophallus.

Remarks. Two specimens collected from Si-Rambe were misidentified as Doryscus testaceus by Jacoby (1896). They are members of D. boreri sp. nov. and D. sumatrensis sp. nov. respectively.

Etymology. This new species is named for its type locality.

Distribution. Indonesia (Sumatra).

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