Zhang, Bin & Wang, Chin-Fah, 2018, Henanocerus lineatus gen. nov. and sp. nov., a new leafhopper feeding on Populus tomentosa Carrière from China (Hemiptera, Cicadellidae), Zootaxa 4442 (4), pp. 584-588: 584-585

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gen. nov.

Henanocerus  gen. nov.

Type species: Henanocerus lineatus  sp. nov.

Diagnosis. Medium-sized leafhoppers. Length usually from 5.8 to 6.5 mm.

Coloration. Body generally darkish brown, with black markings on head and thorax ( Figs 1-3 View Figure ).

Morphology. Head ( Figs 1, 3 View Figure ) slightly wider than pronotum. Crown shagreen, anterior margin convexly rounded, posterior margin parallel to anterior margin. Face ( Fig. 4 View Figure ) slightly wider across eyes than long. Ocelli near distal ends of frontal sutures, closer to adjacent eyes than to each other. Frontal sutures slightly arched above antennal ledges. Anteclypeus trapezoidal, slightly projecting beyond genae, expanded apically. Lateral margins of genae almost straight. Antenna short without distal part of flagellum dilatated in male. Lora small, slightly elevated above level of genae. Pronotum ( Figs 1, 3 View Figure ) with anterior margin convexly rounded, lateral margins moderately long, posterior margin concave. Scutellum ( Figs 1, 3 View Figure ) subtriangular, slightly broader than long, and longer than pronotum. Forewing ( Fig. 5 View Figure ) with 4 apical cells and 3 subapical cells, outer subapical cell smallest and closed distally; inner subapical cell longest and open basally. Hind wing ( Fig. 6 View Figure ) with four apical closed cells. Hind femoral macrosetae 2+0, hind tibial macrosetae PD 20–23, AD 7, AV 9–10. Hind basitarsus with three platellae on distal transverse row.

Male genitalia. Male valve ( Fig. 8 View Figure ) distinctly wider than long, posterior margin with tapered median projection. Pygofer ( Fig. 9 View Figure ) elongate and narrow, dorsal apodeme on anterior margin poorly developed with ventral process. Anal collar ( Figs 9, 10 View Figure ) well developed with large apically bifucate process on each side. Subgenital plate ( Fig. 9 View Figure ) elongate, slightly longer than pygofer, with long fine setae. Style ( Fig. 11 View Figure ) long, curved dorsally, apex usually bearing row of fine lateral setae. Connective ( Figs 12, 13 View Figure ) T-shaped, caudal half with U-shaped excavation caudally. Aedeagus ( Figs 14, 15 View Figure ) elongate, dorsal apodeme developed, aedeagal shaft tubular, recurved dorsally, with pair of lamellate processes at midlength, gonopore situated slightly basad of midlength shaft on ventral surface.

Female genitalia. Female ovipositor ( Fig. 16 View Figure ) slightly projecting beyond pygofer. Sternite VII broader than long, caudal margin medially rounded. First valvulae ( Fig. 17 View Figure ) with striate sculpturing. Second valvulae ( Fig. 18 View Figure ) regularly broadened in lateral view, with prominent teeth, caudoventral margin denticulated.

Distribution. China (Henan province).

Etymology. The generic name refers to Henan province where the type series was collected. The gender of the genus is masculine.

Remarks. The classifcation of Idiocerini  is uncertain and controversial. For many years, there has been a lack of global revisions and phylogenetic analyses to resolve relationships among the genera. Considering the above factors, Henanocerus  is tentatively placed in the tribe Idiocerini  . Henanocerus  belongs to the groups of genera with the ventral process of the pygofer. It closely resembles Amritodus  but the latter differs in having two closed subapical cells in the forewing, four platellae on the hind basitarsus and longer apodemes on the male pygofer. It also resembles closely subgenus Idiocerus  ( Nabicerus  ) in the general shape and markings but differs in having a ventral process of the pygofer, four platellae on the hind basitarsus, the shape of the aedeagus and absence of expanded disc on the male antennal flagellum.