Guyalna principis, Ruschel, 2017

Ruschel, Tatiana Petersen, 2017, Seven new species of the cicada genus Guyalna Boulard & Martinelli, 1996 (Hemiptera: Cicadidae: Fidicinini) with a re-description of the type species, Zootaxa 4281 (1), pp. 246-279 : 260-263

Guyalna principis sp. nov.

( Figs. 46–55 , 105 )

Type locality. Forte Príncipe da Beira, Rondônia, Brazil.

Type material. Holotype ♂ ( MZUSP) ( Fig. 46 ). “Forte Príncipe da/ Beira , Rondônia / 19.XI–3.XII.1967 / G.R. Kloss col.”.

Paratype ♂ (MZUSP). Same data of the holotype.

Etymology. The name refers to the collection site. Latin: principis , prince.

Diagnosis. The species can be distinguished from all other species of Guyalna by the internal angles of the operculum wide with the apex acute toward the metatrochanter, and the uncus with the lateral margins concave and becoming convex with the lateral uncus lobes wide and expanded laterally. This species is very similar to G. aurora sp. nov. and G. spinula sp. nov. in having the tergites and sternites with golden setae. G. principis sp. nov. can be distinguished from the first by the convex paranota, the acute internal angle of the operculum, and the obtuse protuberances of basisternum 3; and from the second by the absence of spines on the lateral margin of the operculum.

Color. Head and pronotum olive-green stained in black. Mesonotum stained in black. Clavus and base of cubital cell in fore wings, and basal area in hind wings brownish. Abdomen dark brown in dorsal view and golden in ventral view. Sternites with golden setae extending laterally to all tergites, and covering tergites 7 and 8. Legs brownish.

Description. Head ( Fig. 49 ) including eyes, broader than pronotum (except pronotal collar) and mesonotum. Vertex with transverse black band branching laterally toward internal and posterior margin of eyes. Elliptical eyes projecting laterally beyond anterior angles of pronotum, internal margin of eyes almost tangent to imaginary line continued from the lateral fissure of pronotum. Area behind eyes with golden setae. Lateral ocelli widely separated, distance between them equivalent to distance between each lateral ocellus and eye. Lateral ocelli not higher than median ocellus in frontal view. Antennae totally dark brown. Postclypeus ( Fig. 47 ) with twelve transverse ridges, globose in lateral and oval in ventral view, apex prominent in dorsal view relative to supra-antennal plates. Central sulcus slender and shallow. Space between transverse grooves golden. Anteclypeus and carina totally black with golden setae. Lorum black with golden setae. Rostrum with tawny mentum and brown labium. Labium short, reaching the posterior margin of basisternum 3.

Pronotum ( Fig. 49 ) narrower than mesonotum (except the pronotal collar) with black band with anterior margin sinuous in ambient fissure. Anterior margin stained in black. Paranota convex and wide, visible in dorsal view. Mesonotum ( Fig. 49 ) with submedian and lateral sigillae black. Lonzenge-shaped black mark present between sigillae extending to scutellum. Scutal depression black. Scutellum with posterior projections forming an obtuse angle, apices slightly pointed. Epimeral lobe not reaching the anteromedin margin of operculum. Anepimeron 2 shorter than epimeral lobe. Basisternum 3 ( Fig. 50 ) with well-developed protuberances relative to median insertion, protuberances apices spaced, posterior margin of basisternum 3 straight, anterior margin concave. Operculum ( Fig. 51 ) triangular, apex almost closing tympanal cavity, lateral margin convex, posterior margin straight, internal angles wide with the apex acute toward the metatrochanter, widely separated. Meracanthus does not reach the posterior opercular margin. Gutter present only on lateral margin of operculum. Profemora armed three spines, primary round at apex and leaning forward, secondary sharp and straight, apical straight and shorter than others. Three segmented tarsi. Wings hyaline. Fore wings with median vein divergent to cubitus anterior vein, basal cell entirely opaque, apical cell 2 shorter than 1 and 3, medial crossvein oblique. Hind wing radius vein arched.

Abdomen subcylindrical, length less than combined length of head and thorax in dorsal view. Timbal cover ( Fig. 48 ) tumid, rounded apex reaching the lateral metascutellar plate, medial margin concave partly covering timbals. Tergite 1 visible. Sternite I visible in ventral view. Posterior margin of sternite II concave. Median projection of sternite II almost reaching the posterior limit of metacoxa. Sternite VII ( Fig. 52 ) sub-rectangular, lateral margin straight, posterior margin emarginate forming two obtuse apices. Sternite VIII ogive-shaped.

Pygofer ( Fig. 53 ) with rounded distal shoulder. Basal lobe of pygofer short, not reaching the lateral uncus lobes, not delimited from lateral margin of pygofer. Uncus ( Fig. 105 ) without spines, lateral margins concave becoming convex. Median uncus lobe short, triangular with obtuse apex in ventral view. Lateral uncus lobes wide, expanded laterally with lateral margins concave and internal margins rectangular, closely separated in ventral view. Lateral uncus lobes elongated in posterior view. Protuberance of basal plate distant from apex of basal lobe. Basal curve of aedeagus short, near lateral lobes. Theca ( Figs. 54, 55 ) dorsally developed forming a sclerotized filament attached to vesica and extending beyond apex forming a horn. The horn curved basely and apically. Vesica originates in fissure at theca, extruded at apex.

Measurements (mm). Holotype ♂. (lb): 25.90; (wh): 13.00; (lh): 3.77; (wp): 12.48; (lp): 5.30; (wm): 10.70; (lm): 8.66; (lfw): 40.55; (wfw): 12.42; (lhw): 18.37; (whw): 8.50. Paratype ♂. (lb): 26.70; (wh): 13.38; (lh): 4.09; (wp): 12.89; (lp): 5.74; (wm): 11.82; (lm): 9.16; (lfw): 41.90; (wfw): 13.05; (lhw): 18.94; (whw): 9.48.

Distribution. Brazil (Rondônia).

Figures

FIGURES 46 – 48. Guyalna principis sp. nov. 46. Holotype male in dorsal view; 47. Postclypeus in ventral view; 48. Timbal cover in lateral view. Scales bar 46: 1 cm; 47, 48: 2 mm.

FIGURES 49 – 55. Guyalna principis sp. nov., holotype male. 49. Head and thorax in dorsal view; 50. Basisternum 3 in ventral view; 51. Right operculum in ventral view; 52. Sternite VII in ventral view; 53. Pygofer in ventrolateral view; 54. Theca in lateral right view; 55. Theca in lateral left view. Scales bar 49: 2 mm; 50 – 53: 1 mm; 54, 55: 0.5 mm.

FIGURES 101 – 109. Uncus in ventral view. 101. Guyalna bonaerensis; 102. G. aurora sp. nov.; 103. G. flavantica sp. nov.; 104. G. pilosa sp. nov.; 105. G. principis sp. nov.; 106. G. sakakibari sp. nov.; 107. G. spinula sp. nov.; 108. G. tenebrae sp. nov.; 109. G. fumea comb. nov.. Scale bar: 0.5 mm.