Bioacoustics of Chilecicada viridicitata

Diagnosis. Another of the smaller of the Chilecicada species. This new species can be distinguished by having in combination a body length between 16.70–17.65 mm , fore wing length between 17.15–18.40 mm , fore wing basal cell about 3.14 times longer than broad, ground color proximal fore wing basal cell, no fascia separating the fore wing costa and radius + subcostal veins, a triangular meracanthus, a piceous mark on the medial opercular margin, semicircular posteromedial operculum, abdominal epipleurites with a central spot, and a narrow uncus that is piceous with ground color dorsal fascia with the distal third bent. The rapid echeme song resembles the songs of C. citatatemporaria and C. occidentis but is half the rate of those species.

Legs. Legs ground color, tinged with green in some paratypes , coxae, trochanters and femora striped with piceous, femora striped additionally with castaneous, stripes reduced in some paratypes , tibiae with piceous spot proximally, castaneous anterior side, mark not reaching proximal terminus in hind tibiae, tibial spurs and tibial combs ground color with castaneous tips, tarsi castaneous with piceous distal segmental margins except ground color proximal mesotarus and metatarsus of hind tarsi, pretarsal claws dark ground color with piceous tips. Fore femora with primary spine almost perpendicular to femur, secondary spine upright, longest, with broad base, and very small tertiary spine, spines ground color, primary and secondary spines with piceous tips. Proximal segments with short silvery pile, all segments radiating long silvery pile. Male meracanthus ground color with piceous spot on base, an elongated triangle with lateral margin distally curving mediad, reaching slightly beyond operculum posterior margin not reaching posterior of tympanal cavity. Female meracanthus similarly shaped and colored, reaching to anterior of sternite III. Opercula. Male opercula ground color with piceous spot on lateral base and piceous along medial margin, piceous expanded in some paratypes , lateral margin straight, obtusely angled posterolateral margin, posterior margin straight, smoothly curved posteromedial margin rounded, anteromedial margin curved to base, not reaching to anterior of sternite II posteriorly, well separated medially barely reaching lateral meracanthus, covered with short silvery pile, long silvery pile radiating from operculum margin. Female operculum similarly colored and shaped reaching to anterior of sternite II. Abdomen. Abdominal tergite 1 piceous with ground color anterior and posterior margins, tergite 2 piceous anterodorsally between timbal cavities, piceous within timbal cavity, castaneous dorsally with ground color posterolateral margin, tergites 3–8 piceous anteriorly bordered posteriorly with castaneous dorsally with ground color lateral posterior margins, amount of castaneous increasing and ground color decreasing in posterior tergites, tergites covered with short silvery pile, longer pile radiating from lateral tergites 4–8, missing in some paratypes . Timbal cover a thickened rim, timbal completely exposed with 13 long ribs and 11 intercalary ribs. Male sternite I ground color, sternite II testaceous with ground color anterior margin, small transverse piceous fascia on either side of midline near anterior margin angled posteromedially and fusing on posterior margin, second transverse fascia on anterior margin in middle of tympanal cavity, auditory capsule piceous, sternites III–VII testaceous, central castaneous mark in some paratypes , sternite III with piceous fascia on anterior margin expanding into spot on midline and small piceous spot on anterolateral corner. Epipleurites testaceous with central castaneous spot. Sternite VIII testaceous with castaneous anterior margin, dorsal margin with curve near base forming an obtuse angle, Vshaped when viewed from posterior. Sternites and epipleurites with short silvery pile and radiating long silvery pile, denser on posterior sternites. Female sternite VII testaceous with large anterolateral piceous spots, single, deep, large V-shaped notch reaching posterior margin of sternite VI, posterolateral margin on either side of notch curved anterolaterad to straight lateral margin. Female abdominal segment 9 ground color ventrally, piceous dorsally and laterally castaneous posteriorly, dorsal beak piceous, covered with short silvery pile and radiating long silvery pile ventrally. Dorsal beak not as long as piceous anal styles. Posterior margin of abdominal segment 9 straight. Genitalia. Male pygofer piceous except ground color ventrally and ground color dorsoposterior margin, distal shoulder undeveloped, smoothly curved, not reaching to anal tube, dorsal beak absent, pygofer with short silvery pile. Upper pygofer lobe absent, pygofer basal lobes elongated, adpressed to lateral pygofer, flattened, angled dorsally at oblique angle, extending more than half pygofer length, widening distal to angle before tapering to leaf-like apex, apex against lateral pygofer margin. Anal styles piceous margined with ground color, radiating short silvery pile, anal tube piceous with ground color anterior and posterior margins. Median uncus lobe piceous, elongated, undivided, angled posteriorly from base, distal third curving toward sternite VIII, widening laterally from base before tapering to transverse posterior margin, small ground color ridge on dorsal surface midline, ventral surface piceous, ventral surfaces recurved, almost meeting along midline expanding to small hole near distal terminus for extension of aedeagus, radiating silvery pile. Aedeagus castaneous, basal aedeagus tubular, dark castaneous, terminus not visible in type series. Female gonocoxite IX castaneous with ground color ventral margin, gonapophysis IX castaneous, gonapophysis X piceous. Ovipositor sheath not reaching to tip of dorsal beak. Long golden pile radiating from ovipositor sheath. Measurements (mm). n= 4♂ , 1♀ , mean (range). Length of body: ♂ 17.11 (16.70–17.55), ♀ 17.65; length of fore wing: ♂ 17.85 (17.15–18.40), ♀ 18.15; width of fore wing: ♂ 6.66 (6.45–6.85), ♀ 6.60; length of head: ♂ 2.86 (2.7–2.95), ♀ 2.70; width of head including eyes: ♂ 5.59 (5.35–5.80), ♀ 5.65; width of pronotum including suprahumeral plates: ♂ 5.93 (5.60–6.30), ♀ 6.05; width of mesonotum: ♂ 5.21 (4.90–5.50), ♀ 5.05. Song. (n=7: holotype , 2 paratypes , and 4 uncaptured males from Maule Region , Colchagüa Pr.) A unique combination of a brisk 9.50± 0.37 s- 1 repetition rate of short echemes of duration 0.07± 0.00 s . The dominant frequency band is 9.87–12.03 kHz (mean dominant frequency=10.92±0.19 kHz).