Ricanula curva, Zhang & Wang & Stroiński & Qin, 2021

Zhang, Huan, Wang, Wen-Qian, Stroiński, Adam & Qin, Dao-Zheng, 2021, Two new species and a new combination in the genus Ricanula Melichar, 1898 for Ricaniidae from China (Hemiptera: Fulgoromorpha), Zootaxa 5047 (3), pp. 353-369 : 359-363

Ricanula curva sp. nov.

( Figs 4–6 , 11 )

Etymology. The name is derived from the Latin word ‘ curvus ’, referring to ventral processes of aedeagus being Scurved in lateral view; apical part of ventral processes of periandrium strongly curved laterally in dorsal and ventral view.

Diagnosis. The species is similar to R. peronata sp. nov., but differs from the latter by having apical part of ventral processes of periandrium strongly curved laterally in dorsal and ventral view ( R. peronata —ventral processes boot-shaped in ventral view); ventral processes of aedeagus S-curved in lateral view ( R. peronata —ventral processes of aedeagus oriented ventrally in lateral view).

Description. Measurements. Length (inclu. teg.): male 6.7–8.4 mm, female 7.2–9.6 mm.

Head. Vertex ( Figs 4A, C ) with or without median carina. Frons: lateral carinae of frontal disc finishing basally at the same level as median carina, ending about the level of antennae.

Thorax. Pronotum ( Figs 4A, C ) with small round depressions submedially on each lateral side (in some specimens weakly visible). Mesonotum: lateral carinae of mesonotum ( Figs 4A, C ) reaching posterior margin; anterolateral carinae connected with anterior margin.

Tegmen: postero-apical part of tegmen with two eye-spot black cells, posterior margin almost straight. Longitudinal veins ScRA and RP arising as short common stem from basal cell, MP veins forked on basal cell. Claval veins Pcu and A 1 fused before midlength of CuP vein. Hind wing with r-m transverse veinlets present in distal part of wing ( Fig. 4F ).

Hing legs: Basitarsomere of metatarsus with 8 apical teeth. Metatibiotarsal formula 2/6/8.

Male terminalia ( Figs 5A–B , 6A–I ). Anal tube (in dorsal view, Fig. 5B ) nearly as rectangle; posterior margin strongly concave, basal margin slightly convex, lateral margins straight; anus placed before midlength, paraproct slightly surpassing the posterior margin. Pygofer (in lateral view, Fig. 5A ): dorso-posterior angle with process. Genital styles ( Fig. 5A ) broadly triangular in lateral view; ventral margin convex; dorsal margin weakly convex, with small concavity before spine-like process.

Phallic complex ( Figs 6A–C ): Periandrium ( Figs 6D–F ) with ventral processes, apical part of ventral processes of periandrium curved laterally (in dorsal and ventral view), ventral periandrium distinctly convex in middle; dorsal periandrium with U-shaped structure with membranous apical part sclerotized base in dorsal view; lateral margin of periandrium with rod-shaped processes in lateral view.

Aedeagus ( Figs 6G–I ) with two pairs of processes. Median split asymmetrical: ventral split present only in 1/5; dorsal split very deep, reaching almost basal part. All processes single armed: lateral processes longer than ventral processes, about 2/3 of aedeagus, curved dorsally at 2/3 of its length; ventral processes S-curved ventrally in lateral view.

Female terminalia ( Figs 5C–I ). Pregenital sternite: posterior margin medially with two processes, margin between processes with strong and deep incision ( Fig. 5I ).

Anal tube (in dorsal view, Fig. 5C ) elongate, with posterior part wider than basal one; basal margin almost straight, posterior margin widely concave medially, lateral margins arcuate; anus placed a bit before midlength, paraproct surpassing the posterior margin.

Gonoplac posterior margin with two rows of teeth.

Coloration. General color brown to dark brown ( Figs 4A–B ). Lateral margins of frons yellow, area alongside frontoclypeal suture yellow, clypeus brown with yellow patch medially under frontoclypeal suture, rostrum yellowish with brown apex ( Fig. 4D ). Eyes ( Fig. 4B ) sordid brown, ornamented with irregular black brown patches. Gena ( Fig. 4B ) brown with two yellow spots. Tegmen ( Figs 4A–B, E ) brown to dark brown; costal margin with about 13–16 transverse brown stripes from base to a little beyond middle, between the transverse brown stripes filled with light yellow stripes, tegmen sub-medially with a large flavescent spot marked by 2 central transverse brown lines. Wings ( Fig. 4F ) brown, each side of A 2 with a grayish narrowed band longitudinally. Abdomen and terminalia brown.

Type material. Holotype, male, China: 28 May 1982, Guangxi, Tianlin, Langping, coll. Jikun Yang.

Paratypes (13 males, 21 females, China) : 4 males, 2 females: 11 Apr. 1978, Guangxi, Baise, Yangwei , coll. Xianyu Qian ; 1 male: 12 May 1980, Guangxi, Longzhou, Longhu , coll. Zhuyin Wang ; 1 male: 17 May 1982, Guangxi, Longzhou, Nonggang , 240m, coll. Fasheng Li ; 2 males: 29 May 1982, 1 female: 30 May 1982, Guangxi, Tianlin, Langping , coll. Jikun Yang ; 1 female: 25 Jun. 1982, Guangxi, Longsheng , coll. Jikun Yang ; 3 males, 14 females: 3 Jun. 1984, 1 female: 9 Jun. 1984, Guangxi, Lingtian commune, coll. Zhengliang Wu et Xiaolin Lu ; 1 male, 1 female: 6 May 1993, 1 male, 1 female: 8 May 1993, Guangxi, Longzhou, Daqing Mountain , coll. Sikong Liu.

Distribution. China (Province Guangxi).

Figures

FIGURE 4. Ricanula curva sp. nov. A, habitus, dorsal view; B, same, lateral view; C, anterior part of body, dorsal view; D, frons and clypeus, frontal view; E, tegmen, dorsal view; F, wing, dorsal view. Scale bars = 1.0 mm (Figs A–B, E–F); 0.50 mm (Figs C–D).

FIGURE 5. Ricanula curva sp. nov. A–B: male terminalia; C–I: female terminalia. A, male terminalia, lateral view; B, male anal tube, dorsal view; C, female anal tube, dorsal view; D–E, gonapophyses IX and gonospiculum bridge: D, lateral view; E, dorsal view; F, female terminalia, bursa copulatrix and spermatheca, lateral view; G, gonoplac, lateral view; H, gonapophysis VIII and endogonocoxal process, lateral view; I, Pregenital sternite, ventral view. Scale bars = 0.50 mm (Figs A, G–I); 0.20 mm (Figs B–E); 0.10mm (Fig. F).

FIGURE 6. Ricanula curva sp. nov. A–C: phallic complex; D–F: periandrium; G–I: aedeagus. A, D, G, lateral view; B, E, H, dorsal view; C, F, I, ventral view. Scale bars = 0.20 mm (A–F); 0.50 mm (G–I).

FIGURE 11. The distribution of Ricanula spp. in China.