Ivmaka longicaudatus Xu & Dietrich, 2023

Xu, Ye, Zhang, Peng-Wen, Dietrich, Christopher H. & Qin, Dao-Zheng, 2023, A new genus of Empoascini (Hemiptera, Cicadellidae, Typhlocybinae) from Papua New Guinea, Zootaxa 5271 (1), pp. 175-179 : 176-177

Ivmaka longicaudatus Xu & Dietrich , sp. nov.

( Figs. 1–14 )

Type species: Holotype. J ( UCD), Papua New Guinea Gulf: Ivimka Res. Station Lakekamu Basin, 120m 7’44’S 146’30’E, 7–8, March, 2000, T. Sears, MT . Paratypes. 2J ( INHS), same data as holotype .

Description. Body length: male 3.1–3.3 mm.

General color of body orange brown ( Figs. 1–3 ). Vertex orange yellow; coronal suture brown, with pair of irregular dark brown spots on each side ( Figs. 1–3 ). Eyes silvery gray to black ( Figs. 1–3 ). Ocelli surrounded by yellowish creamy patches ( Fig. 3 ). Face orange to pale yellow from vertex to anteclypeus; lateral frontal suture brown ( Fig. 3 ). Pronotum with median yellow transverse band bordered by thin dark brown lines, anterior margin white, posterior part tan ( Fig. 1 ). Mesonotum with basolateral triangles black, otherwise dark brown ( Fig. 1 ). Forewing dark brown, subhyaline distally with veins brown and contrasting with pale membrane; hind wing transparent, veins brown ( Figs. 1, 2 ). Legs orange except the pretarsus dark brown ( Figs. 1–3 ).

Male 2S abdominal apodemes parallel, moderately broad, reaching middle of segment V ( Fig. 4 ). Male pygofer bearing 2–3 long and 10–11 small rigid setae on dorsal margin, group of 17–20 feeble microsetae near middle of lobe; distal process of pygofer lobe nearly straight and evenly tapered; dorsal bridge extended almost four-fifths length of lobe ( Figs. 7, 8 ). Anal tube process slender, sinuate, apex sharply narrowed to point hooked anterad ( Fig. 9 ). Style sinuate, dentifer bearing about 13 tiny teeth preceded by 2 fine setae and few sensory pits ( Fig. 10 ). Connective 1amellate, with medial sclerotization; anterior margin straight or weakly concave; lateral margin distinctly constricted ( Fig. 11 ). Subgenital plate in lateral view with apex round and bent dorsad along ventral margin of pygofer lobe; basal setae (7–8) uniseriate, distinctly longer than marginal setae, marginal setae (29–30) arranged in 1–2 rows occupying nearly half length of dorsal margin, macrosetae (21–22) arising near based of plate, terminated at marginal setae, feeble microsetae (54–60) irregularly arranged in 3–6 irregular rows ( Figs. 7, 12 ). Aedeagus slender, V-shaped in lateral view, shaft with few tiny teeth dorsally, wide basally, then abruptly narrowed, apex bifid in posterior view giving rise to pair of short distally directed processes ( Figs. 13, 14 ).

Etymology. The specific epithet is a compound Latin adjective “ longicaudatus ”, which refers to the elongate male pygofer of the new species.

Distribution. Papua New Guinea.

Figures

FIGURES 1–6. Ivmaka longicaudatus Xu & Dietrich, sp. nov. 1. male adult (abdomen removed), dorsal view; 2. male adult (abdomen removed), left lateral view; 3. face; 4. sternal apodemes; 5. forewing; 6. hind wing.

FIGURES 7–14. Ivmaka longicaudatus Xu & Dietrich, sp. nov. 7. male genital capsule, left lateral view; 8. male pygofer, dorsal view; 9. anal tube, left lateral view; 10. style; 11. connective; 12. subgenital plates; 13. aedeagus, left lateral view; 14. aedeagus, ventral view.