Guyalna pilosa, 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 : 258-260

publication ID 10.11646/zootaxa.4281.1.25

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Guyalna pilosa

sp. nov.

Guyalna pilosa View in CoL sp. nov.

( Figs. 37–45 View FIGURES 37 – 39 View FIGURES 40 – 45 , 104 View FIGURES 101 – 109 )

Type locality. Manaus , Amazonas, Brazil.

Type material. Holotype ♂ ( MCTP) ( Fig. 37 View FIGURES 37 – 39 ). BRAZIL, “ Manaus, AM / (RES. DUCKE) / 21–23.IX.1997 / R. Ott, leg // MCTP 48781 View Materials ”.

Etymology. The name refers to the setae distributed along the body. Latin: pilus, hair.

Diagnosis. The species can be distinguished from all other species of Guyalna by the setose body mainly on the lorum and scutellum, basisternum 3 with well-developed protuberances relative to the median insertion, the surface of the timbal cover flat and abdomen short (relative to the combined length of head and thorax in dorsal view). This species has a similar morphology to G. maxineae but differs by the theca with a short horn and lateral uncus lobes large with the posterior margin obtuse forming a rounded lobe expanded laterally.

Color. Head, pronotum and mesonotum brown, abdomen dark brown. Clavus and base of cubital cell in fore wings, and basal area in hind wings brownish. Legs brownish proximally, becoming tawny distally.

Description. Head ( Fig. 40 View FIGURES 40 – 45 ) including eyes, broader than pronotum (except pronotal collar) and mesonotum. Large longitudinal black band covering majority of vertex to posterior margin of apex of postclypeus and reaching the supra-antennal plates in dorsal view. Vertex with golden setae. Eyes elliptical, as wide as head, 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 not higher than median ocellus in frontal view. Antennae totally dark brown. Postclypeus ( Fig. 38 View FIGURES 37 – 39 ) with twelve transverse ridges, stained in black, band connects with band in central sulcus, oval in ventral view and flat in lateral view, apex slightly prominent in dorsal view relative to supra-antennal plates. Central sulcus slender, stained in black and with blond setae. Spaces between transverse grooves brown. Anteclypeus and carina black. Lorum black with many setae mainly concentrated at lateral margin of postclypeus. Rostrum with tawny mentum and labium. Labium long, reaching the middle portion of sternite II, black at apex.

Pronotum ( Fig. 40 View FIGURES 40 – 45 ) flat, slightly wider than head, narrower than mesonotum (except pronotal collar) with black band with anterior margin sinuous in middle of ambient fissure. Anterior margin of pronotum stained in black. Paranota narrowly visible in dorsal view. Mesonotum ( Fig. 40 View FIGURES 40 – 45 ) with submedian and lateral sigillae stained in black, lozenge-shaped black band present between sigillae. Scutellum flat, posterior projections forming an acute angle, apices slightly pointed, with blond setae. Epimeral lobe not reaching the anteromedian margin of operculum. Anepimeron 2 and epimeral lobe of same length. Basisternum 3 ( Fig. 41 View FIGURES 40 – 45 ) with well-developed protuberances relative to median insertion, protuberances apices spaced, anterior margin concave, posterior margin of basisternum 3 straight. Operculum ( Fig. 42 View FIGURES 40 – 45 ) triangular and short (apex not closing tympanal cavity), with golden setae, posterior margin straight, lateral margin convex, internal angle slender widely separated. Meracanthus reaches the posterior opercular margin. Gutter present only 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 median vein divergent to cubitus anterior vein, basal cell entirely opaque, apical cell 2 shorter than 1 and 3, medial crossvein oblique. Hind wings with radius vein arched.

Abdomen subcylindrical, length less than combined length of head and thorax in dorsal view. Timbal cover ( Fig. 39 View FIGURES 37 – 39 ) flat, apex rounded reaching the lateral metascutellar plate, medial margin concave partly covering timbals. Tergite 1 not visible. Sternite I not visible in ventral view. Posterior margin of sternite II concave. Median projection of sternite II long, reaching the posterior limit of metacoxae. Sternite VII sub-rectangular. Sternite VIII ogive-shaped.

Pygofer ( Fig. 43 View FIGURES 40 – 45 ) with rounded distal shoulder. Basal lobe of pygofer short, not reaching the lateral uncus lobes, not delimited with lateral margin of pygofer. Uncus ( Fig. 104 View FIGURES 101 – 109 ) without spines, anterior margin long, forming a protuberance, lateral margins convex. Median uncus lobe triangular in ventral view. Lateral uncus lobes large with posterior margin obtuse forming a rounded lobe expanded laterally and internal margin forming a slender rectangular lobe 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. 44, 45 View FIGURES 40 – 45 ) dorsally expanded, forming a horn attached to vesica and with curved apex. Vesica originates in fissure at theca, extruded at apex.

Note: Sternite VII was not drawn because it was damaged during the extraction.

Measurements (mm). Holotype ♂. (lb): 18.50; (wh): 10.88; (lh): 2.97; (wp): 10.74; (lp): 4.20; (wm): 9.12; (lm): 6.82; (wfw): 33.96; (lfw): 10.72; (lhw): 7.82.

Distribution. Brazil (Amazonas).


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