Usana tongmaiensis Long & Huang, 2023

Huang, Xiu-Dong, Yang, Lin, Chen, Xiang-Sheng & Long, Jian-Kun, 2023, Two new species of the planthopper genus Usana Distant, 1906 (Hemiptera, Fulgoromorpha, Achilidae) from China, ZooKeys 1184, pp. 361-375 : 361

Usana tongmaiensis Long & Huang sp. nov.

Figs 1 , 2 , 5-8 , 9-14 , 21-23 , 28 , 29

Type materials.

Holotype: ♂, China: Xizang, Bomi, Tongmai (30°6'N, 95°4'E), 20 August 2020, light trap, Y.-J. Sui leg.; IEGU. Paratypes: 3 ♂; Tongmai; 30°6'N, 95°4'E; light trap, 20 August 2020, Y.-J. Sui leg.; 2 ♂; Tongmai; 30°6'N, 95°4'E; light trap, 12 August 2017, B. Yan leg.; IEGU.

Diagnosis.

This species is similar to U. fissura in appearance, but differs from that species in the following: frons with 1 dark-brown, straight band at the proximal base and end; end part of postclypeus dark brown (with a brown marking at each side of median carina in U. fissura ); length of anal segment in dorsal view (Fig. 13 ) ~1.7 times as long as width (length to maximum width ratio of 1.0 in U. fissura ); anal segment in lateral view (Fig. 14 ) with nearly right-angle bend from base to end (not bent in U. fissura ); lateral lobe relatively simple (right lateral lobe with a large and a small subapical processes in U. fissura ).

Description.

Body length (from apex of vertex to fore-wing apex): male 5.6-6.2 mm (n = 5); fore-wing length: male 4.8-5.2 mm (n = 5).

Colouration. Generally yellowish white to dark brown (Figs 1 , 2 ). Vertex yellowish white with 2 longitudinal, dark-brown stripes along midline (Figs 1 , 9 ). Face yellowish white; frons with 1 dark-brown, straight band at proximal base and end; end part of postclypeus dark brown (Fig. 10 ). Genae yellowish white, with a brown band in front of compound eyes; eyes reddish brown, ocellus yellowish white; Antenna yellowish brown, with 1 dark-brown, oblique stripe below it (Fig. 11 ). Rostrum yellowish brown, with end brown. Pronotum yellowish brown with 2 dark-brown, longitudinal stripes between lateral carinae, lateral lobe brown behind eyes, and ventral lobe with a longitudinal brown stripe (Figs 1 , 2 , 9 ). Mesonotum brown, with middle and lateral ridges yellowish brown (Figs 1 , 9 ). Tegulae with inner half yellowish white, external half yellowish brown (Fig. 9 ). Tegmen yellowish white to dark brown (Figs 1 , 2 , 5 ). Costal area yellowish brown. Postcostal cell yellowish white to brown, with brown near base and on end areas, medial area with 3 irregular, dark-brown spots. Radial area yellowish brown to dark brown; C1a yellowish brown; C1' and C1b dark brown. Radial cell yellowish brown to dark brown; C2 and C2' dark brown. Medial area yellowish brown to dark brown; C3 with irregular, deep-brown markings; C3a and C3' dark brown. Median cell yellowish brown to dark brown; C4 with irregular, deep-brown markings; C4' dark brown. Areola postica yellowish brown to dark brown; C5' dark brown. Cubital cell brown to deep brown, with 2 yellowish-white markings at near the middle. Basal cell end half deep brown. Area between CuP and Pcu with base half yellowish white and half brown. Area between Pcu and wing margin brown, with base yellowish white. Hind wing pale brown; veins brown. Legs and abdomen yellowish brown (Fig. 2 ).

Head and thorax. Vertex not concave, slightly declivous; triangular areolets at lateroapical angles of head distinct; anterior margins carinate; arcus convex forward; lateral margins carinate, relatively straight, and diverging basad; posterior margin broadly concave (Figs 1 , 9 ). Frons slightly convex in lateral view; upper margin (apex) truncate; median carina evident; lateral margin carinate, sinuately diverging to level of antennae, thence gradually incurved to suture (Fig. 10 ). Clypeus with distinct median and lateral carinae (Fig. 10 ). Rostrum just reaching trochanter of hind legs (Fig. 2 ). Antenna nearly cylindrical, not sunken as a depression (Figs 2 , 10 , 11 ). Ocelli separated from eyes (Fig. 11 ). Pronotum with 3 distinct carinae; anterior margin of disk broadly convex; posterior margin obtusely angled, concave at middle; median carina distinct; lateral carinae straight, slightly diverging rearward, attaining hind margin; lateral lobe with a small longitudinal carina between eye and tegula (Figs 1 , 9 ). Mesonotum wider, with 3 obvious, nearly parallel carinae (Figs 1 , 9 ).

Tegmen with costal margin slightly convex; apical margin roundly convex; distinctly concave on postclaval margin (Figs 5 , 6 ). Stem ScP+R+MP short after basal cell before MP fork; stem ScP+R forked at ~1/3 of tegmen length, slightly before CuA fork; vein ScP+RA with fork clearly before RP fork, with 2 terminals; branch RP with 2 terminals; vein MP with fork plainly after CuA fork, with 3 terminals; branch CuA with 2 terminals (Figs 5 , 6 ). Hind wing with simple ScP+RA, branch RP vein with 1 terminal, MP with 3 terminals (MP1, MP2 and MP3+4), vein CuA with 2 terminals, vein A2 without blind branches (Fig. 7 ).

Legs. Post-tibiae with a lateral spine at basal 1/4. Metatibia with 6 or 7 apical teeth; rightmost apical teeth obviously larger, arrangement slightly slanting; basimetatarsomere with row of 7 apical teeth, their arrangement slightly slanting; midmetarsomere with 5 or 6 apical teeth, their arrangement slightly slanting, each tooth with platellae except for marginal ones, internal spines; metatibio-tarsal formula 7(6)-7-6 (5) (Fig. 8 ).

Head. Vertex: A/B = 2.3. Frons: C/D = 1.2; D/E = 1.5; F/C = 0.5. Rostrum: G/H = 1.5.

Thorax. Pronotum: I/B = 0.7. Mesonotum: J/I = 9.1; J/B+I = 3.8. Fore-wing: K/L = 3.1. Hind wing: M/N = 1.9.

Male terminalia. Anal segment in dorsal view (Fig. 13 ) with maximum width near middle, hence narrowing basad and apically; apical margin roundly concave at middle, length of anal segment ~1.7 times as long as width; anal style not exceeding apical margin of anal segment. Anal segment in lateral view (Fig. 14 ) with nearly right-angle bend from base to end. Pygofer in lateral view (Fig. 14 ) with dorsal margin distinctly shorter than ventral margin, anterior margin deep concave at 1/3 its length; posterior margin near middle obviously serrated, convex. Medioventral process of pygofer in ventral view (Fig. 12 ) entire, apically narrowed, with apical margin angularly incised. Genital style slightly narrowing apically, with apex roundly convex; dorsal margin gives rise to 2 large, sharp processes and 1 short, blunt process; inner surface near anterior margin with a slender, outwardly directed, finger-like process (Figs 12 , 28 , 29 ). Aedeagus structure relatively simple, nearly symmetrical, nested (Figs 21 , 22 ). Lateral periandrial lobe of phallobase obviously longer than dorsal and ventral periandrial lobe (Figs 21 , 22 ). Dorsal periandrial lobe unpaired, in dorsal view finger-like (Fig. 21 ); left and right lateral periandrial lobes nearly symmetrical, with apical margins roundly convex. Ventral periandrial lobe in ventral view (Fig. 22 ) along inner margin of each lateral side from subapical to middle with a longitudinal group of teeth, subapical surface in middle gives rise to a long process, directed basad, with its apical margin roundly convex. Inner penis rods elongate, lanceolate, curved, apically pointed, basally broadly fused together (Fig. 23 ).

Etymology.

The species name refers to the type locality, Tongmai, Xizang, China.

Host plant.

Unknown.

Distribution.

China (Xizang).

Figures

Figures 1 - 4. Adult male habitus (dorsal and lateral views) of Usana new species 1, 2 U. tongmaiensis sp. nov. 3, 4 U. rotalarius sp. nov. Scale bars: 1 mm.

Figures 5 - 8. Usana tongmaiensis sp. nov., male 5, 6 fore-wing 7 hind wing 8 post tibiae. Scale bars: 1 mm (5 - 7); 0.5 mm (8).

Figures 9 - 20. Head, thorax and pygofer of Usana new species 9 - 14 U. tongmaiensis sp. nov., male 15 - 20 U. rotalarius sp. nov., male 9, 15 head and thorax, dorsal view 10, 16 face 11, 17 head, lateral view 12, 18 pygofer and genital style, ventral view 13, 19 anal segment, dorsal view 14, 20 male genitalia, lateral view. Scale bars: 1 mm (9 - 11, 15 - 17); 0.5 mm (12 - 14, 18 - 20).

Figures 21 - 31. Genital, genital style and post tibiae of Usana new species 21 - 23, 28, 29 U. tongmaiensis sp. nov. 24 - 27, 30, 31 U. rotalarius sp. nov. 28, 30 left genital style, inner surface view 29, 31 left genital style, ventral view 21, 26 aedeagus, dorsal view 22, 27 aedeagus, ventral view 23, 24 inner penis rods in dorsal view 25 post tibiae. Scale bars: 0.5 mm.