Ricanula hainanensis, Ren, Lan-Lan, Stroiński, Adam & Qin, Dao-Zheng, 2016

Ren, Lan-Lan, Stroiński, Adam & Qin, Dao-Zheng, 2016, Three new species of the genus Ricanula Melichar, 1898 (Hemiptera: Fulgoromorpha: Ricaniidae) from China, Zootaxa 4168 (3), pp. 557-569 : 566-569

Ricanula hainanensis sp. nov.

( Figs 35–49 )

Etymology. The species was named after Hainan Island (South China)—the type locality.

Description. Length (female, inc. teg.): 9.7 mm.

Head. Head with compound eyes (in dorsal view, Figs 35, 38 ) about as wide as widest part of mesonotum. Vertex ( Figs. 35, 38 ) 7 times wider in the anterior margin than long in midline, anterior and posterior margins arcuate, posterior margin with larger curvature than anterior one.

Frons ( Fig. 37 ) wider then long in midline, 1.17 times wider at upper margin than long in midline and in widest part, below ocelli level 1.31 times; upper margin straight, lateral margins arcuate, elavated and without lateral incisions; disc of frons tricarinate, carinae separated at base; median carina extending half of length in midline, lateral carinae arcuate, partly parallel to lateral margins, finishing a little before the median one. Frontoclypeal suture distinctly arcuate. Clypeus distinctly narrower than frons, without carinae, median part convex.

Compound eyes ( Fig. 36 ) oval in lateral view, with small callus at posteroventral margin. Ocelli present.

Rostrum reaching mesotrochanters, apical segment shorter than subapical.

Thorax. Pronotum ( Figs 35, 38 ) 2.16 times longer in midline than vertex; disc of pronotum with median carina and 2 lateral incisions; anterior margin arcuate, posterior margin with strongly curvation than anterior one.

Mesonotum ( Figs 35, 38 ) 1.12 times longer than wide between lateral angles and about 3.95 times longer than cumulative length of vertex and pronotum in midline; disc of mesonotum with median and lateral keel-shape carinae, connected at base, lateral carinae reaching almost posterior margin; anterolateral carinae present, short, not connected with lateral, almost parallel to lateral ones not surpassing the lateral angles of mesonotum.

Tegmina ( Figs 35–36, 39 ) membranous, elongately-triangular; costal margin weakly arcuate, anterior angle rounded, placed distad to claval angle, apical margin irregular.

Costal area with sparse and curved transverse veinlets, wider than postcostal cell and wider apically, ending before apex of clavus; postcostal cell without transverse veinlets; basal cell elongate and wide; longitudinal veins ScP+RA, MP and CuA leaving basal cell separately; ScP+R veins and MP forked immediately after leaving basal cell, CuA forked before of connection of Pcu and A1. Claval veins Pcu and A1 fused after midle of clavus with transverse veinlets present between CuP and Pcu, CuP and Pcu+A1 and between Pcu and A1.

Tegmina with sparse transverse veinlets in median and posterior parts, veinlets below MP3+4 vein more dense, apical line of transverse veinlets present, apical cells distinctly longer than wide.

Wings with elongate and narrow precostal cell; 2 transverse veinlets r-m and m-cu present ( Fig. 35 ).

Profemora about as long as tibiae, profemur partly laterally flattened more V shape in cross section, tibiae square in cross section; mesotibiae longer than mesofemora, femora laterally flattened, rectangular in cross section, tibiae square in cross section; metafemur shorter than metatibiae, curved, metatibiae partly flattened apically, with 2 lateral spines and 6 apical teeth; basitarsomere with 6 apical teeth, about as long than cumulative length of second and hind tarsomere. Metatibiotarsal formula 2/6/6.

Coloration. Vertex yellow with 2 brown patches near the antero-lateral part and with 3 small light brown dots along anterior margin. Frons yellow, lateral part of head yellowish with 3 small brown patches at upper part, lower part brownish. Clypeus brownish with median yellow strip. Pronotum yellow. Median portion of mesonotum between lateral margins yellowish, lateral parts brown, scutellum dark brown. Tegmina piceous-brown with yellowish transverse veinlets below MP3+4 and on the clavus, costal margin with oblique dark brown stripes and yellow patches between; basal cell with dark brown patch near posterior margin; median portion of tegmen with rounded brown patch, postero-apical part with eyes-spot black cell. Wings and legs brownish. Abdomen light brown, basal sternits yellow.

Male. Unknown.

Female terminalia. Pregenital sternite ( Fig. 41 ) with well developed, elongately-rounded and distinctly separated lateral lobes; anterior margin weakly concave, posterior margin medially with strong triangular and elongate process.

Anal tube (in lateral view, Fig. 43 ) elongate, not surpassing posterior margin of the gonoplac; basal part narrower than posterior one; ventral margin arcuate, ventroposterior angle widely rounded; anus placed dorsally about midlength.

Anal tube, in dorsal view ( Fig. 42 ), rounded; with basal part distinctly narrower than posterior one, basal margin rounded, posterior margin widely concave medially; lateral margins arcuate; anus placed a bit before midlength.

Gonoplac: laterally flattened, in lateral view ( Fig. 44 ) with posterior part wider than at base, posterior margin with 2 rows of teeth ( Fig. 45 ); membranous part of gonoplac well developed, placed medially on ventral margin.

Gonapophysis VIII ( Fig. 46 ) sabre-like, “v” shape in cross section, with 11 teeth at dorsal margin; endogonocoxal process with spiniferous microsculpture, well sclerotized medially, lateral parts membranous, tapering apicad, reaching apex of gonapophysis VIII.

Gonaphophyses IX and gonospiculum bridge well developed as in Figs 47–48 .

Bursa copulatrix with widely connected two pouches; wall of first pouch with well visible cells and small central sclerotized ornamentation bearing single narrow teeth with sharp and curved apex, mostly placed at lower part, second pouch membranous with very weakly visible cells and without ornamentation.

Spermatheca ( Fig. 49 ) well developed; ductus receptaculi elongate and ribbed, tapering apicad; diverticulum ductus a bit shorter than ductus receptaculi, with smooth basal ductus and elongate smooth bulba at apex.

Type material. Holotype, 1♀, labeled ( Fig. 40 ): [ Mt. Wuchi , Hainan, May 1903].

Distribution. China: Hainan Province (Hainan Island).

Figures

FIGURES 35 – 40. Ricanula hainanensis sp. nov., holotype, female. (35) habitus, dorsal view; (36) same, lateral view; (37) head, frontal view; (38) anterior part of body, dorsal view; (39) tegmen, dorsal view; (40) label. Scale bars = 5 mm (Fig. 35); 1 mm (Figs 36 – 39).

FIGURES 41 – 49. Ricanula hainanensis sp. nov., holotype, female. (41) pregenital sternite, flattened; (42) anal tube, dorsal view; (43) same, lateral view; (44) gonoplac, external lateral view; (45) posterior margin of the gonoplac, internal view; (46) gonopophysys VIII and endogonocoxal process, lateral view; (47) gonapophysis IX and gonospiculum bridge, dorsal view; (48) same, lateral view; (49) spermatheca. Scale bars = 1 mm (Figs 41, 44 – 46, 49); 0.50 mm (Figs 42, 43, 47, 48).