Pachymetopius falcatus, Wei & Xing & Webb, 2019

Wei, Xingtao, Xing, Jichun & Webb, Michael D., 2019, Key to species of the genus Pachymetopius Matsumura (Hemiptera: Cicadellidae: Stegelytrini) with description of a new species from China, Zootaxa 4571 (2), pp. 290-294 : 291-292

Pachymetopius falcatus sp. nov. ( Figs 1–12 )

Description. Body black. Vertex anteriorly with four yellow spots ( Fig. 4 ). Face with yellow transverse short band near dorsal margin and lateral margin of frontoclypeus ( Fig. 5 ). Forewing black basally and apically, with broad subapical transverse transparent band and few hyaline preapical spots ( Fig. 1 ). Foretibia, apex of hind tibia and hind tarsomeres milky white (middle tibia missing) ( Fig. 2 ).

Head including eyes distinctly narrower than pronotum ( Fig. 1 ). Vertex triangularly produced, slightly wider basally than medium length, foremargin slightly angular next to eye then evenly curved to apex ( Fig. 4 ), disc concave, smooth basally, finely rugose apically. Foremargin of head rim-like in lateral view, striate ( Fig. 2 ). Face similar in length to width, in profile concave dorsally, convex ventrally; frontoclypeus relatively broad, slightly longer than width between eyes; lorum very narrow ( Fig. 3 ); antennae arising near mid-height of eye in facial view; anteclypeus distinctly swollen basally, transclypeal suture absent ( Fig. 5 ).

Male genitalia: Pygofer side elongate, base wide, apex narrow, smoothly rounded, with numerous macrosetae on posterior area in lateral aspect, and with inner process hook shaped ( Fig. 6 ). Valve broad and short in ventral view, median length about one half its width ( Fig. 7 ). Subgenital plate with outer and inner margins subparallel, with short setae on ventral surface and posterior margin ( Fig. 8 ). Aedeagal shaft in lateral view narrow basally thereafter expanded and tapered to rounded apex ( Fig. 10 ); in ventral view shaft broad basally, constricted subbasally and subapically with apex spherical and bifurcate at tip ( Fig. 9 ); pair of elongate lateral processes arising basally on dorsal surface extending two thirds distance from base to apex of shaft, tapered distally to acute apex. Connective with arms slightly shorter than stem, widely divergent ( Fig. 11 ). Style with apical process bifurcate, branches slightly curved with inner branch narrower with apex curved laterally and acute ( Fig.12 ).

Measurement. Length (including tegmen): ♂, 5.6 mm.

Type material. Holotype ♂, China: Guizhou Prov., Guiyang City, Xiangzigou , 6~ 7 September 2012, coll. Shiyan Xu ( GUGC).

Distribution. China (Guizhou).

Remarks. The new species is similar to P. nanjingensis , but differs from the latter in having the forewing black basally and apically, with a broad subapical transverse transparent band; the male pygofer side with the inner process hook shaped; the aedeagal shaft constricted subapically in ventral view; and the outer apical style process narrow.

Etymology. The new species name is derived from the Latin word “ falcatus ”, referring to the hook shaped inner process of the male pygofer side.

Figures

FIGURES 1–5. Pachymetopius falcatus sp. nov., 1. ³, dorsal view; 2. ³, lateral view; 3. ³, face, lateral view; 4. ³, head and thorax, dorsal view; 5. ³, face, ventral view.

FIGURES 6–12. Pachymetopius falcatus sp. nov., 6. Male pygofer side, lateral view; 7. Valve, ventral view; 8. Subgenital plate, ventral view; 9. Aedeagus, ventral view; 10. Aedeagus, lateral view; 11. Connective, dorsal view; 12. Style, dorsal view.