Linnavuoriella Evans, 1966

He, Zhiqiang, Zhang, Yalin, Mckamey, Stuart H. & Zahniser, James N., 2019, The Chinese Hecalina (Hemiptera: Cicadellidae: Deltocephalinae: Hecalini) with descriptions of a new genus and seven new species, Zootaxa 4679 (2), pp. 257-285 : 266-267

Genus Linnavuoriella Evans

( Figs 52–68 )

Type species: Platymetopius arcuatus Motschulsky 1859: 115 .

Description. Colour. Yellow green. Vertex margin anteriorly with transverse submarginal dorsal and ventral fuscous lines respectively. Body with orange or yellow colour pattern, fascia on vertex inverted, V-shaped; 2 concentric parabola on pronotum, 3 longitudinal stripes on scutellum. Forewings with same colour lines along veins partially, apical 1/3 light brown with whitish spots in apical and anteapical cells, 3 small dark spots at tip of clavus, M 3+4, R 2+3, and R1 (in male; faint or absent in female), these spots usually fainter in female.

Body. Length 5.0–7.0 mm. Large and stout. Vertex subangularly produced, slightly upturned anteriorly. Anterior tentorium ( Fig. 54 ) slender, furcate. Ocelli close to corresponding eyes. Pronotum slightly wider than head. Profemur ( Fig. 55 ) with about 22 AV (anteroventral) setae and two apical dorsal setae; intercalary row with 9 setae; AM1 setae (anteromedian) present. Hind tibia compressed; first tarsomere with 6 teeth in two rows on plantar surface, 4 platellae and 2 terminal lateral spines at apex; second tarsomere with 4 teeth on plantar surface, 2 platellae and 2 terminal lateral spines at apex; hind femoral setal formula 2-2-1. Forewing with vein R and M fused basally, without crossveins in costal area; M-Cu 2 present; vein A1 of clavus becoming confluent with claval suture, A2 complete and separateappendix narrow and long, extending beyond end of M 3+4.

Male genitalia: Subgenital plate subtriangular, lateral margin concave along posterior 2/3, 4 setae laterally. Pygofer side with ventral lobe, posterior half triangular; densely setose on posterior 2/3. Style subtriangular, dorsoventrally flattened. Connective Y-shaped. Aedeagus with pair of forked terminal processes; aedeagal shaft compressed laterally, without groove; dorsal apodeme well developed; gonopore on ventral side of shaft positioned at 3/4 to 5/6 the length of the shaft from base to apex.

Female genitalia: Ovipositor extending beyond pygofer; first valvulae ( Fig. 59 ) knife-shaped; second valvulae ( Fig. 61 ) straight, slightly humped medially, dorsally fused from basal 2/3, expanded ventrally for distal third; first and second valvulae both lacking dorsal teeth ( Fig. 60, 62 ); sculpturing pattern on first valvula granulose, submarginal; first valvula with distinctly delimited ventroapical sculptured area. Seventh sternum rounded with weak medial projection.

Distribution. Oriental Region and Australia.

Remarks. This genus resembles the New World genus Spangbergiella Signoret 1879 in having one claval vein and similar colour pattern dorsally; but the latter has only one orange or yellow longitudinal line in the middle of the pronotum, lacks the inner parabola, has forewing veins M and Cu 1 fused basally, and has an apical gonopore.

There is only one known species in China.

Figures

FIGURES 52–68. Linnavuoriella arcuata. 52, male adult, dorsal view; 53, female adult, dorsal view; 54, female anterior tentorium; 55, female left fore femur; 56, female left forewing; 57, female right hindwing; 58, female 7th abdominal sternum; 59, 1st valvulae; 60, apical part of 1st valvulae; 61, 2nd valvulae; 62, apical part of 2nd valvulae; 63–64, aedeagus, lateral and ventral view respectively; 65, style, dorsal view; 66, connective, dorsal view; 67, male pygofer, lateral view; 68, subgenital plate.