Ricanula fujianensis sp. nov.

(Figs 18–34)

Etymology. The species name is derived from the type locality, Fujian Province.

Diagnosis. Ricanula fujianensis sp. nov. is similar to R. pulverosa (Stål), but differs from the latter in having numerous yellowish transverse veinlets in inner half of tegmina (with few transverse veinlets on basal portion in R. pulverosa); ventral periandrium of the new species bearing a pair of processes (ear-like structure with almost transparent bar-like process beyond it), bending dorsal and oriented to phallic complex (ventral periandrium without processes in R. pulverosa); apical spinose processes of aedeagus long, surpassing half length of the phallic complex (apical spinose processes short, not reaching half length of the phallic complex in R. pulverosa).

Description. Length (inclu. teg.): male 8.7–9.8 mm, female 9.3–10.8 mm.

Head. Head with compound eyes nearly as wide as the widest part of mesonotum (Fig. 20). Vertex narrower than pronotum, about 6.0 times wider at the anterior margin than long in midline, all margins well carinate, posterior margin arcuate more strongly than anterior margin; disc of vertex without median carina, from anterior to posterior margins downwardly sloped (Fig. 20).

Frons 1.31 times wider at widest part (about the level of lower margin of ocelli), than long in midline, a little longer at upper margin than high in midline; upper margin slightly arcuate, lateral margins arcuate, in lower part curved to frontoclypeal suture; frontal disc with 3 carinae separated basally, lateral carinae arcuate, reaching the level of the midlength of the median carina (Fig. 21); frons oriented postero-ventral (Fig. 19).

Frontoclypeal suture arcuate (Fig. 21). Clypeus ecarinate, triangular, not in the same plane than frons and distinctly narrower, median portion convex (Fig. 21).

Compound eyes oval, with callus at lower margin (Figs 18–21). Ocelli present (Figs 19, 21).

Rostrum reaching mesotrochanters, apical segment shorter than subapical.

Thorax. Pronotum distinctly longer in midline than vertex; disc of pronotum with median carina, anterior and posterior margins arcuate, in median portion almost parallel (Fig. 20).

Mesonotum about 4.2 times longer than cumulative length of vertex and pronotum in midline; median carina keel-shaped, almost reaching scutellum; lateral carinae not connected basally, almost reaching posterior margins; anterolateral carinae not fused with lateral carinae, not surpassing the lateral angles of mesonotum (Fig. 20).

Tegmina (Figs 18–19, 22) membranous, elongately-triangular; costal margin weakly arcuate, slightly incised near apical angle, anterior angle broadly rounded, placed distad to claval angle, posterior margin almost straight. Costal area with sparse transverse veinlets, a little wider than postcostal cell and a little widened apically, postcostal cell without transverse veinlets; basal cell small, widely rounded; veins ScP+R, MP and CuA leaving basal cell separated. ScP+R vein forked just after leaving basal cell, MP dividing into MP1+2 and MP3+4 basally, CuA forked before middle of clavus. Claval veins Pcu and A1 fused about midlength of clavus. Tegmen without lines of transverse veinlets, in inner half with numerous irregular transverse veinlets.

Wings small, costal area present and small; postcostal cell distinctly longer than wide, 2 transverse veinlets r-m and m-cu present (Fig. 22).

Pro- and mesofemora as long as pro- and mesotibia, both square in cross section; metafemur square, shorter than metatibiae, metatibiae partly flatted, with 2 lateral spines and 6 apical teeth; basitarsomere with 6~8 apical teeth, a little longer than cumulative length of second and hind tarsomere. Metatibiotarsal formula 2/6/6–8.

Coloration. General color of body dark brown to dark (Figs 18–19). Vertex with 2 brown reddish stains at each posterolateral corner, lateral margins pale yellow (Fig. 20). Pronotum brown (Fig. 20). Mesonotum dark brown, sometimes with 2 brown reddish spots anterolaterally (Fig. 20). Frons brown, clypeus and rostrum brownish (Fig. 21). Eyes sordid brown, ornamented with irregular black patches (Figs 18–21). Ocelli red. Gena light brown with three pale white spots. Tegmina piceous-brown, costal margin with about 10 transverse black stripes from base to a little beyond middle, between the stripes filled with greyish-white patches, submedially with a large pale flavescent or greyish-white spot marked by two central transverse black lines, the inner half of tegmina filled with numerous pale yellowish transverse veinlets (Figs 19, 22). Wings brown, A2 ornamented with longitudinal grayish band on both sides (Fig. 23). Pro-, mesofemora and tibiae brown. Metafemora and metatibiae brown yellowish. Abdomen dark brown.

Male terminalia. Anal tube, in dorsal margin, with basal margin, shorter than posterior margin, posterior margin concave, basal margin straight, lateral margins arcuate, anus placed in middle, paraproct not surpassing the posterior margin (Fig. 30). Anal tube, in lateral view, far surpassing the end of pygofer; ventral margin convex (Fig. 24).

Pygofer, in lateral view, higher than wide; dorsally narrower than ventrally, posterior margin almost straight; posterior-dorsal angle without process, caudo-dorsal angle not angulate (Fig. 24).

Genital styles in lateral view obviously longer than wide, with a spine-like process at the end of dorsal margin; upper margin convex, lower margin mostly straight; ventral margin in caudo-dorsal angle widely rounded and surpassing the posterior margin of process (Fig. 24).

Phallic complex. Phallic complex, in lateral view, broad and short, bent at middle; periandrium with lateral split longer than half of its length, lateral lobes present; periandrium, in dorsal view, longer than aedeagus, upper margin of dorsal periandrium divided in middle, lateral lobes slightly bent inside; in ventral view the upper of ventral margin with 2 ear-shaped lobes, the apical lobe bearing bar-shaped transparent process (in lateral and dorsal views), basal part of periandrium without any additional structures; dorsal periandrium shorter than ventral (Figs 31–33).

Aedeagus shorter than periandrium, with 2 pairs of well sclerotized, smooth and spinose processes in lateral view, each process with a single apex, apical process longer than subapical one. Processes long, a little shorter than periandrium, both oriented basad (Figs 31–33).

Female terminalia. Pregenital sternite with lateral lobes well developed, median portion strongly narrow; anterior margin weakly concave medially; posterior margin straight with slightly convex median portion (Fig. 34).

Anal tube in lateral view short, ventral margin convex (Fig. 25).

Anal tube in dorsal view, 1.3 times longer in midline than wide at widest part (widest submedially), lateral margins convex, basal margin slightly concave, posterior margin concave, anus placed after midlength, paraproct surpassing the posterior margin of anal tube (Fig. 29).

Gonoplac: posterior margin bearing 2 well visible rows of blunt and short teeth (the upper margin 2-3 melt rows), posterior ventral part partly membranous (Fig. 26).

Gonapophysis VIII partly flattened laterally, tapering apicad; dorsal margin slightly concave, with sharp apex and well visible teeth at posterodorsal margin, near apex with spiniferous microsculpture; endogonocoxal process narrower and shorter than gonaphophysis VIII, smooth (Fig. 28).

Gonapophysis IX with posterior connective lamina sclerotized, gonospiculum bridge finger-like caudodorsally, needle-like ventro-dorsally (Fig. 26).

Type material. Holotype, 1♂: [China: Fujian, Wuyi mountain, Tongmucun, 850 m, coll. Manqiang Wang and Bin Xiao, 16 Aug. 2008].

Paratypes: 6♂♂ and 5♀♀, same data as holotype; 9♂♂ and 10♀♀: [Fujian, Sanming, Longxi mountain, 725 m, col. Fengjuan Ren, 2 Aug. 2013] .

Distribution. China: Fujian Province.