Empoasca (Okubasca) dianella Qin & Zhang

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 : 62-64

Empoasca (Okubasca) dianella Qin & Zhang , sp. nov.

( Figs. 19–30 )

Type materials. Holotype. 3 ( NWAFU), China: Yunnan Province, Yaoqu, 13.vi.2009, coll. Wei Cui, light trap. Paratype. 1 3, same data as holotype.

Descriptions. Length. 3 4.7 mm.

General colour yellow. Vertex orange, with small hypodermal round spot medially at each side, coronal suture brown. Eyes black. Face with frontoclypeus orange, anteclypeus and genae white. Pronotum mostly orange, anteriorly with medial semicircular milky patch and two irregular milky patches laterally behind eyes. Centre of scutellum with quadrate milky patch anteriorly and big patch caudad of scutoscutellar sulcus. Forewing semi-transparent, brochosome field whitish, hindwing greyish white. Abdomen and legs yellowish white.

Body robust ( Fig. 38 ). Head narrower and distinctly shorter than pronotum ( Fig. 35 ). Vertex short and broad, rounded anteriorly, in dorsal view distinctly narrower than width between eyes, anterior and posterior margins parallel, coronal suture distinct, surpassing half of vertex length ( Fig. 35 ). Face short, convex in lateral aspect ( Fig. 37 ), lateral frontal suture distinct ( Fig. 36 ), vertex in profile rounded to face ( Fig. 37 ). Pronotum large, more than 2.0 times longer than vertex in midline ( Fig. 35 ). Forewing narrow, rounded apically, veins RP and MP’ separate at bases, 2nd apical cell broadening towards apex ( Fig. 19 ).

Basal sternal abdominal apodemes parallel-sided, reaching end of segment IV ( Fig. 30 ). Male pygofer elongate, apical 2/5 strongly narrowing caudad, with 6–7 rigid microsetae on each side of lobe ( Figs. 21, 23 ); ventral appendage short, pygofer with 11–12 rigid microsetae at the lower margin level with apex of appendage ( Figs. 21, 23 ); dorsal bridge short, less than third of total length of pygofer, caudo-dorsally curved medially ( Fig. 22 ). Subgenital plate longer than pygofer side, broadest subbasally and narrowing apicad, curved dorsad in apical half, with 14–15 lateral macrosetae, numerous marginal microsetae on almost whole dorsal margin of plate and several fine microsetae arranged in 1–2 rows, apical part of plate infuscated ( Figs. 21, 25 ). Paramere sinuate apically, subapex bearing 6 teeth preceded by 10–11 long fine microsetae ( Fig. 29 ). Connective lamellate, apical margin notched medially ( Fig. 28 ). Aedeagus with preatrium and dorsal apodeme undeveloped, shaft tubular, in profile broadest at base and strongly narrowing apicad, shaft curved caudo-dorsad from basal 2/5, apical half of shaft with margins nearly parallel in lateral aspect, gonopore ventrad near apex ( Fig. 26 ), shaft in ventral view with irregular teeth subapically on both sides ( Fig. 27 ). Anal tube process surpassing half height of pygofer, narrowing and curved caudad apically ( Figs. 21, 24 ).

Remarks. E. (O.) dianella can be distinguished from other species of this subgenus by the anal tube appendage which is curved caudad apically.

Etymology. The species name is formed from “ dian ” (abbreviation of Yunnan), with the diminutive suffix – ella, referring to the type locality of the new species.

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

Figures

FIGURES 19 – 30. Empoasca (Okubasca) dianella Qin & Zhang sp. nov., 19, forewing; 20, hindwing; 21, male terminalia, left lateral view; 22, pygofer side, dorsal view; 23, same, left lateral view; 24, anal styli, left lateral view; 25, subgenital plate, lateral view; 26, aedeagus, lateral view; 27, same, ventral view; 28, connective; 29, paramere; 30, abdominal apodemes.

FIGURES 35 – 38. Empoasca (Okubasca) dianella Qin & Zhang sp. nov., 35, head and thorax, dorsal view; 36, face; 37, whole body, lateral view; 38, whole body, dorsal view.