Xenocoelidiana, 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 : 46-48

Xenocoelidiana gen. nov.

( Figures 1–15 )

Type species: Xenocoelidiana ornata sp. nov., by monotypy.

Description. In dorsal view, body approximately cylindrical, wider anteriorly, tapering posteriorly, not flat. Head with crown almost quadrangular, as long as wide, median length of crown one third of transocular width and approximately equal to interocular width; anterior margin broadly round, without a carina in the transition between crown and front; lateral margins, adjacent to compound eyes, elevated (not level with the dorsum of compound eyes) and strongly carinate; surface flat, smooth, without grooves, with two small concavities lateral to midline close to posterior margin (tentorial pits); long coronal suture present at the basal half of crown ( Fig. 1 ); ocelli located on anterior margin of head, in the transition between crown and front, closer to compound eyes than to midline; in lateral view, antennal ledges straight and strongly carinate ( Fig. 2 ); antennae setaceous, scape and pedicel enlarged, flagellum longer than the basal half of forewings ( Fig. 2 ); front with length approximately two times basal width, profile convex, muscle impressions indistinct; frons-genal sutures almost parallel, reaching ocelli; apical margin of maxilla extended beyond apex of clypeus; lorum small, approximately oblong, prolonged basally, inferior margin not reaching apical margin of clypeus; gena not entirely concealing proepisternum, only apex visible in anterior view; epistomal suture distinct and complete, slightly curved; clypeus almost rectangular, lateral margins parallel, with apical gibbosity, and apical margin straight ( Fig. 3 ). Thorax with pronotum little wider than head, width between humeri approximately 1.25 times transocular width; median length 2.5 times width between humeri; lateral margins long, anteriorly convergent, posteriorly rounded and convergent toward posterior margin; posterior margin curved, not emarginate ( Fig. 1 ); dorsal surface smooth, without grooves; dorsopleural carina complete, long and evident; in ventral view, mesothorax slightly swollen; scutellum as long as maximum width, with distinct preapical fold ( Fig. 1 ). Forewing ( Fig. 4 ) about 4–5.5 times longer than greatest width; apex rounded and narrowed; without punctuations, hyaline; venation distinct, not elevated, little visible except for claval suture and apical cells; four apical cells, all almost rectangular, first larger than second, second closer to forewing base than third, third and fourth approximately of same distance to base; three anteapical cells, outer one closed, inner and middle anteapical cells open; appendix narrow, extending only along first apical cell. Hindwing with three apical cells, R4+5 and M1+2 apically convergent, fused, forming a single vein. Hind leg: femoral setal formula: 2+2+1 or 2+1+1; tibial row PD with long setae little separated amongst themselves, intercalary setae absent; row AD with long and robust setae, in form of spines, with two or more small intercalary setae present; row AV with setae long and robust, longer apically, with elevated bases, distributed throughout length of tibia, intercalary setae absent; row PV densely bristly, with short setae at base, becoming progressively longer apically. First tarsomere as long as combined length of two distal ones, plantar surface with two parallel rows of short setae.

Discussion. This new genus is similar to the genera whose species lack a carina in the transition between crown and front: Chinchinota Kramer , Deltocoelidia Kramer , Chinaia Bruner & Metcalf , Xenocoelidia Kramer , and Paraphysiana Chiamolera & Cavichioli. The new genus runs to Xenocoelidia in Kramer’s (1964) key and closely resembles this other genus; however, it possesses a combination of diagnostic characters that separate it from this and the other genera: carina absent between crown and front; lateral margins of crown, adjacent to compound eyes, elevated and strongly carinate; coronal suture distinct and long, on the basal half of crown; ocelli on the anterior margin of head, in the transition between crown and front, visible in dorsal view; antennal ledges straight and strongly carinate, in lateral view; clypeus rectangular, with lateral margins parallel and an apical gibbosity; posterior margin of pronotum curved, not emarginate; forewing venation distinct, little visible except for claval suture and apical cells, with four apical cells and three anteapical cells; hindwing with three apical cells, R4+5 and M1+2 apically convergent, fused, forming a single vein.

Note. The generic name is feminine and combines the name of the closest genus, Xenocoelidia Kramer , with the suffix – ana, a combination common in the names of other genera of Neocoelidiinae .

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.