Guyalna sakakibari Ruschel 2017, sp. nov.
Creators: name: Ruschel, Tatiana Petersen
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Guyalna
Guyalna sakakibari

description: Guyalna sakakibari sp. nov.
(Figs. 56–65, 106)
Type locality. Vilhena, Rondônia, Brazil.
Type material. Holotype ♂ (DZUP) (Fig. 56). “ Vilhena, RO / 19.XI.1986 / C. Elias, leg/ Polonoroeste// DZUP / 444443.”.
Etymology. The species is named in honor of Prof. Albino M. Sakakibara for his outstanding contributions to knowledge of Auchenorrhyncha in Brazil.
Diagnosis. The species can be distinguished from all other species of Guyalna by the dark brown body with golden setae, the lateral margin of the operculum longer than the posterior margin and the median uncus lobe with some spines on the surface, the lateral uncus lobes obtuse, expanded laterally, with the internal margins rectangular and closely spaced. This species is very similar to G. aurora sp. nov. and G. spinula sp. nov. but can be distinguished from the first by the median uncus lobe with spines on the surface and from the second by the vesica extending beyond the apex with a lateral projection.
Color. Dark brown body, color stained with black. Clavus and base of cubital cell in fore wings, and basal area in hind wings brownish. Legs brownish. Abdomen dark brown in dorsal view and golden in ventral view. Tergites with golden setae.
Description. Head (Fig. 59) including eyes, broader than pronotum (except the pronotal collar) and mesonotum. Vertex with transverse black band extending to supra-antennal plates and to lateral and posterior margins of eyes. Elliptical eyes projecting laterally beyond anterior angles of pronotum, internal margin of eyes medial to imaginary line continued from 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 higher than median ocellus in frontal view. Antennae totally brown. Postclypeus (Fig. 57) with thirteen transverse ridges, slightly salient in lateral view and oval in ventral view, apex prominent in dorsal view relative to supra-antennal plates. Central sulcus slender and shallow. Anteclypeus and carina dark brown with golden setae. Lorum black with golden setae. Rostrum with tawny mentum and labium. Labium short, reaching the posterior margin of basisternum 3, black at apex.
Pronotum (Fig. 59) narrower than mesonotum (except the pronotal collar), black band with anterior margin sinuous in ambient fissure. Anterior margin of pronotum stained in black. Paranota straight and wide, visible in dorsal view. Mesonotum (Fig. 59) with submedian and lateral sigillae black. Lozenge-shaped black band present between sigillae. Scutal depression black reaching the scutellum. Scutellum with posterior projections forming an acute angle, apices slightly acute. Epimeral lobe not reaching the anteromedian margin of operculum. Anepimeron 2 shorter than epimeral lobe. Basisternum 3 (Fig. 60) with well-developed protuberances relative to median insertion, protuberances apices spaced, posterior margin of basisternum 3 straight, anterior margin oblique. Operculum (Fig. 61) triangular, apex not closing tympanal cavity, lateral margin convex, longer than the sinuous posterior margin, internal angles wide, apex obtuse, widely separated. Meracanthus does not reach the posterior opercular margin. Gutter present on lateral margin of operculum. Profemora armed with 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 veins green distally and brown basely, median vein divergent to cubitus anterior vein, apical cell 2 shorter than 1 and 3, medial crossvein oblique. Hind wings with basal area brownish, radius vein arched.
Abdomen subcylindrical, length less than combined length of head and thorax in dorsal view. Timbal cover (Fig. 58) tumid, rounded apex reaching the lateral metascutellar plate, the 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 with apex acute almost reaching the posterior limit of metacoxa. Sternite VII (Fig. 62) subrectangular, lateral margin straight, posterior margin emarginate forming two obtuse apices. Sternite VIII ogiveshaped.
Pygofer (Fig. 63) with rounded distal shoulder. Basal lobe of pygofer short, not reaching the lateral uncus lobes. Uncus (Fig. 106) with lateral margins straight. Median uncus lobe wide, triangular with some spines on surface in ventral view. Lateral uncus lobes obtuse, expanded laterally, with lateral margins straight and internal margins rectangular, closely spaced 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. 64, 65) dorsally developed forming a horn attached to vesica and extending beyond the apex. Vesica originates in fissure at theca, extruded at apex with lateral projection.
Measurements (mm). Holotype ♂. (lb): 27.50; (wh): 13.70; (lh): 3.60; (wp): 13.10; (lp): 5.80; (wm): 11.40; (lm): 9.34; (lfw): 42.86; (wfw): 13.07; (lhw): 20.20; (whw): 9.38.
Distribution. Brazil (Rondônia).
description: Published as part of 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, pp. 246-279 in Zootaxa 4281 (1) on pages 263-266, DOI: 10.11646/zootaxa.4281.1.25, http://zenodo.org/record/816099