Empoascanara dichotomus, Yang & Luo & Song, 2021

Yang, Xiao, Luo, Guimei & Song, Yuehua, 2021, Two new species of Erythroneurini from China (Hemiptera, Cicadellidae, Typhlocybinae), Biodiversity Data Journal 9, pp. 70141-70141 : 70141

Empoascanara dichotomus sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: Zhouwei Yuan and Chao Tan ; individualCount: 1; sex: male; lifeStage: adult; Taxon : scientificName: Empoascanara dichotomus; order: Hemiptera ; family: Cicadellidae ; genus: Empoascanara ; specificEpithet: dichotomus; Location : country: China; stateProvince: Guizhou; locality: Huajiang , Xiagu Village ; Event : eventDate: 2019-05-2 T15:25-0800; Record Level : collectionCode: insects; basisOfRecord: PreservedSpecimen Type status: Paratype. Occurrence: recordedBy: Zhouwei Yuan and Chao Tan ; individualCount: 11; sex: female; lifeStage: adult; Taxon : scientificName: Empoascanara dichotomus; order: Hemiptera ; family: Cicadellidae ; genus: Empoascanara ; specificEpithet: dichotomus; Location : country: China ; stateProvince: Guizhou; locality: Huajiang , Xiagu Village ; Event : eventDate: 2019-05-20 T15:20-080; Record Level : collectionCode: Insect ; basisOfRecord: PreservedSpecimen

Description

Body length male 2.1-2.3 mm; female 2.2-2.4 mm. Vertex brownish-yellow, with one irregular spot near anterior margin (Fig. 1 A and C). Face brownish-yellow, relatively long, with pale yellow anteclypeus oval-shaped contrasting face colouration (Fig. 1 D). Pronotum with large brownish-yellow markings running at middle (Fig. 1 C). Scutellum brownish-yellow (Fig. 1 C). Forewing and hindwing almost transparent (Fig. 1 A). Abdominal apodemes small, not extended beyond hind margin of 3rd sternite (Fig. 3 G).

Diagnosis

Male genitalia. Pygofer lobe with scattered microsetae at right edge. Dorsal pygofer appendage process without branch. Subgenital plate (Fig. 3 B) broad sub-basally, provided with seven mid-length macrosetae on lateral surface centrally, several small fine setae scattered on apical area (Fig. 3 B). Style apex with two terminal points, pre-apical lobe developed (Fig. 3 D). Aedeagus with a pair of processes arising from apex of shaft; pre-atrium shorter than shaft, gonopore at subapex (Fig. 3 E and F). Connective M-shaped (Fig. 3 C).

Etymology

The specific name is derived from the Latin word " Empoascanara dichotomus " (bifurcated), referring to the bifurcated processes on the aedeagal shaft in the ventral view (Fig. 3 E and F).

Taxon discussion

Empoascanara dichotomus is characterised with the morphology of the genus Empoascanara as follows:

Crown fore margin strongly produced and angulate medially or weakly produced, broadly rounded apically. Vertex usually with pair of dark pre-apical spots or with large median apical patch. Pronotum pale or almost entirely dark or with dark posterior margin. Forewing with venation of clavum obscure.

Male pygofer lobe rounded or angulate, without dorsal macrosetae, with sparse long fine setae. Pygofer dorsal appendage movably articulated, ventral appendage absent. Subgenital plates free, lateral margin with angulate sub-basal projection, with 2-4 basal macrosetae and distinct marginal sub-basal rigid setae forming continuous row or with marginal sub-basal rigid setae restricted to basolateral angle. Style pre-apical lobe prominent. Style apex smooth, slender or truncate and expanded, third point absent. Aedeagus dorsal apodeme not expanded in lateral view; shaft curved dorsad, smooth or denticulate distally; apex broadened, truncate or acuminate in ventral view; ventral processes placed basally, well separated from shaft. Connective median anterior lobe broad, arms short.

Empoascanara dichotomus is similar to Empoascanara thomasi Dworakowska, 1979; however, the new species has an aedeagus with a pair of processes on the apex instead of on the subapex and processes apex branched and the more chitinised aedeagus.

Figures

Figure 1. Empoascanara dichotomus sp. nov. A. Habitus, dorsal view; B. Habitus, lateral view; C. Head and thorax, dorsal view; D. Face; E. Female pygofer.

Figure 3. Empoascanara dichotomus sp. nov A. Pygofer, lateral view; B. Subgenital plate, dorsal view; C. Connective, ventral view; D. Style, lateral view; E. Aedeagus, ventral view; F. Aedeagus, lateral view; G. Abdominal apodemes, ventral view.