Empoasca (Okubasca) calvata Qin & Liu

Liu, Yang, Qin, Dao-Zheng, Fletcher, Murray J. & Zhang, Ya-Lin, 2011, Review of Empoasca (Okubasca) Dworakowska (Hemiptera: Cicadellidae: Typhlocybinae: Empoascini), first record from China and description of two new species, Zootaxa 3101, pp. 59-64 : 61-62

Empoasca (Okubasca) calvata Qin & Liu , sp. nov.

( Figs. 7–18 )

Type materials. Holotype. 3 ( NWAFU), China: Zhejiang Province, Gutianshan National Nature Reserve, 17.viii.2003, coll. Wu Dai, by light trap. Paratypes. 5 3, same data as holotype; 1 3, China: Zhejiang Province, Fengyangshan National Nature Reserve, 10.viii.2003, coll. Wu Dai, light trap.

Description. Length. 3 3.7–3.9mm.

General colour yellow. Eyes brown. Pronotum mostly semi-transparent, surrounded with irregular arch of milky patches anteriorly and laterally. Centre of scutellum with quadrate milky patch anteriorly and big patch caudad of scutoscutellar sulcus. Forewing semi-transparent, hindwing greyish white. In some specimens vertex with visible longitudinal narrow stripe on midline, reddish brown.

Body robust ( Fig. 34 ). Head narrower and shorter than pronotum ( Fig. 31 ). Vertex roundly produced anteriorly, in dorsal view slightly shorter than width between eyes, anterior and posterior margins not parallel, coronal suture distinct, surpassing half of vertex length ( Fig. 31 ). Face short, convex in lateral view ( Fig. 33 ), lateral frontal suture distinct ( Fig. 32 ), in profile vertex rounded to face ( Fig. 33 ). Pronotum less than 2.0 times longer than vertex in midline ( Fig. 31 ). Forewing narrow, rounded apically, veins RP and MP’ separate at bases, 2nd apical cell broadening towards apex ( Fig. 7 ).

Basal sternal abdominal apodemes parallel-sided, reaching middle of segment IV ( Fig. 18 ). Male pygofer elongate, apical half strongly narrowing caudad, with 4–6 rigid microsetae on each side of lobe ( Figs. 9, 11 ), ventral appendage relatively long, pygofer with 8–9 rigid microsetae at lower margin ( Figs. 9, 11 ); dorsal bridge nearly one third of total length of pygofer, caudodorsally curved medially ( Fig. 10 ). Subgenital plate longer than pygofer side, broadest subbasally and narrowing apicad, curved caudo-dorsad apically, with 13–16 bluntly terminated lateral macrosetae, numerous marginal microsetae on almost whole outer margin of plate and several fine long microsetae arranged in 1–2 rows ( Figs. 9, 13 ). Paramere bearing 5 apical teeth preceded by 6–8 long fine microsetae. Connective lamellate, trapeziform, apical margin notched medially ( Fig. 16 ). Aedeagus with preatrium and dorsal apodeme undeveloped, shaft tubular, in profile broadest near base and strongly narrowing apicad, subbasally provided with minute transverse ribs on dorsal side, curved caudo-dorsad medially, gonopore ventrad at apex, large ( Figs. 14, 15 ). Anal tube process surpassing half height of pygofer, straight and narrowing with pointed apex ( Figs. 9, 12 ).

Remarks. E. (O.) calvata differs from other species of this subgenus by the aedeagus shaft with minute transverse ribs near its base ( Fig. 14 ) and lacking lateral teeth ( Fig. 15 ), and the apically straight anal tube appendage ( Fig. 12 ).

Etymology. The species name is formed from “ calvatus ” (Latin; adjective = naked) referring to the smooth surface near the apex of the aedeagal shaft.

Distribution. At present known only from the type locality in southern China (Zhejiang Province).

Figures

FIGURES 7 – 18. Empoasca (Okubasca) calvata Qin & Liu sp. nov., 7, forewing; 8, hindwing; 9, male terminalia, left lateral view; 10, pygofer side, dorsal view; 11, same, left lateral view; 12, anal tube appendage, left lateral view; 13, subgenital plate, lateral view; 14, aedeagus, lateral view; 15, same, ventral view; 16, connective; 17, paramere; 18, abdominal apodeme.

FIGURES 31 – 34. Empoasca (Okubasca) calvata Qin & Liu sp. nov., 31, head and thorax, dorsal view; 32, face; 33, whole body, lateral view; 34, whole body, dorsal view.