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

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Doryscus sumatrensis

sp. nov.

Doryscus sumatrensis  sp. nov. ( Figs 20View FIGURE 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. DembickýGoogleMaps  ; 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. 20View FIGURE 20 A). Antennae filiform, antennomere I not modified in males ( Fig. 21View FIGURE 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. 21View FIGURE 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. 21View FIGURE 21 G); but almost straight in females ( Fig. 21View FIGURE 21 H). Penis ( Figs 21View FIGURE 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. 21View FIGURE 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. 21View FIGURE 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. 21View FIGURE 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).


Naturhistorisches Museum, Basel














Doryscus sumatrensis

Lee, Chi-Feng 2017

Doryscus testaceus:

Jacoby 1896: 498