Longicornus concavus, Hu & Xing, 2024

Hu, Shangmi & Xing, Jichun, 2024, Description of two new species of the leafhopper genus Longicornus (Hemiptera: Cicadellidae: Deltocephalinae) from China, Zootaxa 5477 (5), pp. 571-578 : 572-573

Longicornus concavus sp. nov.

Figs. 1 – 10

Description. Body robust, yellowish brown ( Fig.1 ). Vertex with paired irregular dark brown bands. Face with irregular dark brown lateral transverse streaks ( Fig. 4 ). Forewing yellowish brown, with scattered hyaline areas ( Figs. 1, 2 ). Legs dark, with brownish bands.

External features as in generic description.

Male genitalia. Male pygofer side broadly rounded in lateral aspect, with many long posteroventral setae ( Fig. 5 ). Valve strip-shaped, posterior margin concave, resulting in projection on both sides ( Fig. 6 ). Subgenital plate with wide base, narrowed posteriorly, with 8 setae along lateral margin, and mesal margin obviously deeply emarginate near apex ( Fig. 6 ). Aedeagal shaft short and robust, with pair of furcate processes arising from ventral margin near base, the short branches of processes with apex acute, the long branches of processes approximately subtriangular, thin, and its outer margin with fine teeth; gonopore apical ( Figs. 7 – 9 ). Connective with arms nearly 1/3 length of stem ( Figs. 7 – 9 ). Style relatively narrow, apical process acute, turned laterally ( Fig. 10 ).

Measurement. Length (including tegmen): ♂, 5.9 mm.

Material examined. Holotype: ♂, China: Tibet Autonomous Region, Linzhi City, Bomi County, Tongmai Town , 9 August 2020, coll. Yongjin Sui ( GUGC).

Remarks. The new species is similar to L. furcatus Fang & Xing, 2018 , but can be distinguished from the latter by the long branches of the aedeagal processes approximately subtriangular, thin, and its outer margin with fine teeth; valve strip-shaped and posterior margin concave.

Etymology. The species name is derived from the Latin word “ concavus ”, indicating the valve with posterior margin concave.

Figures

FIGURES 1–4. Longicornus concavus sp. nov., 1. ♂, dorsal view; 2. ♂, lateral view; 3. ♂, head and thorax, dorsal view; 4. ♂, face, ventral view.

FIGURES 5–10. Longicornus concavus sp. nov., 5. male pygofer side, lateral view; 6. valve and subgenital plate, ventral view; 7. Aedeagus, paraphyses and connective, ventral view; 8. Aedeagus, paraphyses and connective, dorsal view; 9. Aedeagus, paraphyses and connective, lateral view; 10. Style, dorsal view.