Doryscus krausi , Lee, Chi-Feng, 2017

Lee, Chi-Feng, 2017, Revision of the genus Doryscus Jacoby (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4269 (1), pp. 1-43: 12-14

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Doryscus krausi

sp. nov.

Doryscus krausi  sp. nov. ( Figs 4View FIGURE 4 B, 6)

Types (n= 2). Holotype ♂ ( NHMB): LAOS. Houa Phan prov. : Phou Pane Mt., 20°13’09–19” N 103°59’54”  – 104°00’03”E, 1480–1550 m, 1.–16.V.2009, leg. Z. Kraus. Paratypes: THAILAND. 1♂ ( SEHU), Chiangmai prov. : Doi Pui, 27.V.1983, leg. S. Ohmomo. 

Description. Length 4.0 mm, width 1.5 mm. General color yellow; but antenna dark brown; vertex black; elytra basally and apically darkened; outer margins of tibiae black ( Fig. 4View FIGURE 4 B). Antenna filiform, antennomere I strongly swollen in male ( Fig. 6View FIGURE 6 A), length ratios of antennomeres I –XI 1.0: 0.4: 0.6: 0.6: 0.6: 0.6: 0.6: 0.6: 0.6: 0.6: 0.7, length to width ratios of antennomeres I –XI 2.3: 1.7: 2.7: 3.0: 3.0: 3.0: 3.0: 3.4: 3.2: 3.3: 3.6. Elytra 1.8 x longer than wide, surface with erect, dense, elongate setae, punctures fine. Apical margin of last abdominal ventrite with two incisions in males ( Fig. 6View FIGURE 6 B). Penis ( Figs 6View FIGURE 6 C –6D) extremely slender, 8.5 x longer than wide, parallel-slided; apex of dorsal surface with extremely deep median notch; apex of ventral surface widely rounded, with shallow median groove; weakly curved in lateral view, apex with narrow notch between dorsal and ventral surfaces; ventral surface smooth. Endophallic spiculae long, about 0.6 x as long as penis, with a cluster of setae on apex of median spicula, apically widened; two pairs of lateral spiculae as long as median spicula, apices of inner pair more or less swollen, basally conjoined; one pair of lateral spiculae at middle elongate and apically tapering, one pair of ventral spiculae at base elongate and apically tapering.

Variability. One male possessed unmodified antennomere I (not swollen, 3.3x longer than wide), and relatively smaller lateral and ventral endophallic spiculae ( Figs 6View FIGURE 6 E –6F).

Differential diagnosis. Doryscus krausi  sp. nov. adults are similar to those of D. scapus Mohamedsaid  in possessing swollen first antennomeres in males, but D. krausi  differs by possessing black vertex, a pair of elongate and apically tapering spiculae at base, and at middle of endophallic spiculae, respectively. These are in contrast to the yellow vertex and two pairs of horn-like basal and median endophallic spiculae in D. scapus  .

Etymology. The new species is dedicated to Zdeněk Kraus, who collected the type specimens. Distribution. Laos, Thailand.


Naturhistorisches Museum, Basel