Xenocoelidiana ornata, Marques-Costa, Ana Paula & Cavichioli, Rodney Ramiro, 2006

Marques-Costa, Ana Paula & Cavichioli, Rodney Ramiro, 2006, A new genus of Neocoelidiinae Oman (Hemiptera: Auchenorrhyncha: Cicadellidae), Zootaxa 1361, pp. 45-51 : 48-50

Xenocoelidiana ornata sp. nov.

( Figures 1–15 )

Specimens examined. Male holotype (INPA), with following labels: BRASIL, Amazonas, Juruá, Mineruazinho, 03°34’85’’S, 66°59’15’’W, 13–25.i.1996, Pensylvania, luz negra BLB/ P.F. Bührnhein, N.O. Aguiar et. al. leg.; 1 male paratype (CZPB/UFAM), with the same data of the holotype’s labels; Novo Airão, Ramal dos Madereiros, Km 22, 02°45’29’’S, 60°57’0,7’’W, 06–10.iv.1997, luz negra BLB 6W/ P.F. Bührnheim, N.O. Aguiar & N.F. Fé leg., 1 male paratype (DZUP) and 1 female paratype (INPA).

Measurements (mm). Male holotype / female paratype: total length 7.70/8.0; crown medium length 0.56/0.52; transocular width 1.40/1.47; interocular width 0.70/0.70; pronotum medium length 0.80/0.70; width between humeri 1.90/1.80; scutellum medium length 1.20/1.15; scutellum maximum width 1.0/1.10; forewing length 6.75/8.0; forewing maximum width 1.87/1.50.

General color. Stramineous to brown; crown stramineous. Pronotum brown with a large stramineous stain in anterior margin ( Fig. 1 ). Scutellum with yellowish to whitish longitudinal central band ( Fig. 1 ). Forewing yellowish, hyaline, holotype with a whitish sinuous stripe extending from costal margin to claval suture ( Fig. 4 ). Hindwing yellow with yellow to brown veins. Legs yellow to pale-brown.

Description. Structural characters as in generic description. Forewing approximately four times longer than maximum width. Femoral setal formula of the hind leg: 2+1+1. Male genitalia: in lateral view, pygofer basally wide, narrowing toward apex; apical third with large ventral tooth, dorsal membranous projection, bristly apically, and a great hooklike external process curved dorsally ( Fig. 5 ). Subgenital valve absent; subgenital plates fused only on basal third, slightly narrowed at apical half, and strongly fused with the pygofer; length about four times basal width; apex rounded with microsetae and a row of three to four setae close to inner margin ( Fig. 6 ); in lateral view, without apical tooth.

Styles simple, not bifurcated, short and thin, with a lateral expansion on medium third, apex hook-like ventrally, with bristles below sclerotized hook ( Figs. 7–8 ). Connective Yshaped, about half of style length, with branches very thickened, articulated to base of aedeagus ( Fig. 8 ). In lateral view, aedeagus enlarged and membranous on basal two-thirds, apical third very thin, sclerotized, hook-shaped; ventral tooth present at base of hook; apical gonopore opening at apex of hook ( Fig. 9 ); membranous anal tube without processes or bristles. Female genitalia: pygofer long with anterior, ventral, and posterior margins rounded; with three setae on posteroventral margin and without processes ( Fig. 10 ). Sternum VII approximately rectangular, apical third narrowed, slightly sclerotized medially ( Fig. 11 ). Sternum VIII present, reduced. Valvifer I membranous, approximately rectangular. Valvulae I long, curved dorsally, with prolonged sculptures on apical half, these reaching dorsal margin on apical third ( Fig. 12 ). Valvifer II with microsetae at articulation point with pygofer. Valvulae II long, curved dorsally, fused throughout length, except in apical third ( Fig. 13 ); dorsal margin of apical third with large rounded teeth with lateral denticles, intercalated by smaller teeth; evident ducts opening in pores, near dorsal margin ( Fig. 14 ). Valvulae III long, with rounded and bristly apex, basal half distinctly narrowed ( Fig. 15 ).

Variation. In one paratype the aedeagus lacks a ventral tooth on the apical third, below the hook. Forewings are entirely yellowish in all paratypes, without a sinuous whitish stripe. In some paratypes the femoral setal formula of the hind leg is 2+2+1.

Holotype condition. Right side of the thorax directly glued to an entomological pin. Antennae with flagella partially broken. Left hind leg missing. Forewings and hindwings in perfect state, not broken. Abdomen dissected.

Comments. Xenocoelidiana ornata sp. nov. is easily recognized and separated from the other species of Neocoelidiinae by the unique shape of the aedeagus and the presence of a large external hook-like process at the apex of the pygofer. It is also the only known species that possesses subgenital plates that are strongly fused with the pygofer. The female can be distinguished by the shape of sternum VII and the teeth on the apical third of valvula II.

Etymology. From Latin orno, adornment, ornamentation; hence ornata , with ornamentations, referring to the process of the pygofer and the shape of aedeagus.

Figures

FIGURES 1 – 15, Xenocoelidiana ornata sp. nov.: 1 – 9 (male holotype): 1, head, pronotum and scutellum, dorsal view; 2, head, pronotum and scutellum, lateral view; 3, head, frontal view; 4, forewing; 5, pygofer, lateral view; 6, subgenital plates, ventral view; 7, style, lateral view; 8, styles and connective, dorsal view; 9, aedeagus, lateral view; 10 – 15 (female paratype): 10, pygofer, lateral view; 11, sternum VII, ventral view; 12, valvula I, lateral view; 13, valvula II, lateral view; 14, detail of the dorsal margin, apical third of valvula II; 15, valvula III, lateral view.