Proarna parva Sanborn & Heath, 2014

Sanborn, Allen F. & Heath, Maxine S., 2014, The cicadas of Argentina with new records, a new genus and fifteen new species (Hemiptera: Cicadoidea: Cicadidae), Zootaxa 3883 (1), pp. 1-94 : 13-16

Proarna parva Sanborn & Heath , sp. n.

( Figure 3 )

Proarna parva nom. nud. Sanborn et al. 2011a, p. 4, Tables 1 –2.

Type material.— ARGENTINA. HOLOTYPE: male ( INHS), “ Salta / 9 km So. of Split of / Rts 9 & 34. 19 Dec. 1986 / Al Sanborn Coll. / EX: Prosopis” . PARATYPES: one male ( MSHC) “ Tucuman / Dto. Trancas. Ruta 9 / ca. Trancas. 17–I–1988 / Heath-Sanborn-/ Noriega Coll.” ; one male ( MSHC) “ Tucuman / Dto. Trancas. Ruta 9 / ca. Trancas / 17 Jan. 1988 / Al Sanborn Coll.” ; one male ( MSHC) “ Santiago / del Estero 6.5 km / No. of Ojo de Agua / 15 Dec. 1986 / Al Sanborn Coll.” ; one male ( MSHC) “ Santiago / del Estero 2 km / S.E. of Añatuya. 30 / Dec. 1986 / Al Sanborn Coll.” ; one male ( MSHC) “ Salta / Ruta 9– 8 km So. of / General Guemes / 17 Jan. 1988. Heath- / Sanborn-Noriega Coll.” ; two male “ La Rioja / La Rioja / 5 Jan. 1987 / Al Sanborn Coll. / EX: Prosopis” (one male MSHC, one male AFSC) .

Etymology. The species is named for its small size in comparison to other members of the genus.

Diagnosis. —The only species of Proarna that is similar in size to P. parva sp. n. is P. praegracilis Berg, 1881 . All other species of Proarna (body length 15–28 mm) are significantly larger than P. parva sp. n (body length 12.5mm), The new species has darker markings on the head, thorax and abdomen and the anterior prothorax is about as wide as the eyes; the prothorax is wider than the eyes in P. praegracilis . The postclypeus is flattened ventrally in the new species but rounded in P. praegracilis ; the lateral abdomen is sharply angled and straight to the posterior terminus in the new species but smoothly curving to the terminus in P. praegracilis ; the costal margin is arched in the new species but straight in P. praegracilis ; the male opercula are more bulbous posteriorly with a dark spot on the base in the new species; the distal shoulder of the pygofer is angled dorsally but smoothly rounded in P. praegracilis ; and the lateral lobes of the uncus are wider, shorter, and not bent as strongly laterally in the new species.

Description of male

Coloration.—Ground color of head and thorax ferruginous camouflaged with green, fuscous, piceous, and tawny; abdomen ferruginous marked with piceous.

Head.—Head about 0.92X as wide as mesonotum with large transverse piceous mark on frons and vertex between eyes anterior to medial angle of eye, surrounding ocelli, extending anteriorly onto supra-antennal plate along frontoclypeal suture and posteriorly to margin of head except for ferruginous spot on posterior epicranial suture. Small piceous mark on posterior head slightly curved laterad about two thirds distance to eye. Eye ringed with piceous. Anterior supra-antennal plate piceous margined anteriorly and along anterior angle of frontoclypeal suture with green. Ocelli rosaceous, eyes dark green. Postclypeus castaneous with 10 green transverse grooves and fuscous central sulcus, rounded anteriorly, ventral surface flattened, and silvery pile, more dense in transverse grooves and central sulcus. Anteclypeus fuscous, lighter medially, with tawny anterior and posterior medial margins. Rostrum ochraceous with piceous tip reaching to middle of sternite I. Gena fuscous with tawny stripe between antenna and eye and tawny margin at junction with anteromedial lorum, some paratypes darker without tawny stripe or with green stripe. Lorum fuscous. Head covered with short silvery pile. Scape tawny and elongated, pedicel and proximal first flagellum fuscous, remaining flagellar segments greenish ochraceous, proximal pedicel tawny in some paratypes.

Thorax.—Pronotum ferruginous, midline tinged with green, fuscous longitudinal bands on either side of midline, expanding to widest point at medial lateral fissure, bending laterad and continuing to posterior margin of pronotal collar as width reduces. Piceous transverse spot on midline in ambient fissure and on anterior end of lateral portion of pronotal collar. Anterior margin, posterolateral pronotal collar, pronotal collar posterior to medial portion of lateral disc green. Fuscous mark on anterior of lateral disc extending across lateral part of pronotal collar. Mesonotum ferruginous with fuscous submedian sigillae, arch outlining posterior submedian sigillae connected medially, and posteriorly expanding as a longitudinal mark from junction of arches to anterior margin of cruciform elevation constricting to line and terminating transversely on along posterior midline cruciform elevation. Tawny mark on parapsidal suture outlines submedial sigilla. Anterolateral lateral sigilla and anterolateal mesonotum green. Piceous mark extending posteriorly from anterior margin between parapsidal suture and green portion of lateral sigillae connecting to fuscous arch medially, continuing laterad across middle of lateral sigilla before expanding posteriorly on posterolaterad portion of mesonotum. Scutal depression piceous. Cruciform elevation greenish ferruninous with fuscous marks across anterior of anterior arms and middle of posterior arms, marks on posterior arms connected to medial mark on ventroposterior surface. Wing groove green anteriorly, piceous posteriorly with long white pile laterlly, green faded to tawny in some paratypes. Metanotum fuscous. Dorsum covered with short silvery pile. Ventral thoracic plates fuscous except tawny basisternum 2, posterior meron 2, and basisternum 3, only basisternum 3 tawny in some paratypes. Venter covered with silvery pile.

Forewing and hind wings.—Hyaline. Costa, radius and subcostal vein greenish ferruginous, becoming ferruginous past node, remaining venation ferruginous proximally becoming fuscous distally, except piceous posterior margin of anal vein 2 + 3 and proximal quarter of cubitus posterior + anal vein 1, and piceous spot on branching of radius posterior from median vein. Basal cell clouded with light gray along cubitus anterior and arculus, hyaline anteroproximally. Infuscation on arculus, basal cubitus anterior, mediocubital crossvein, radial crossvein, and ambient vein in apical cells except apical cell 2, light stripes of infuscation within apical cells. Basal membrane grayish white. Hind wing venation ferruginous except piceous anal vein 3 and fuscous proximal anal vein 1, cubitus posterior and cubitus anterior. Vanal fold, anal cell 3, anal cell 2 along anal veins 2 and 3, anal cell 1 along anal vein 2, cubital cell 2 along proximal two thirds of cubitus posterior and base of costal and medial cells whitish.

Legs.—Fore coxae ferruginous with fuscous anterior interrupted stripe and distal terminus, middle coxae ochraceous with proximal and distal fuscous spots and fuscous lateral margin, hind coxae ochracous with fuscous lateral margin. Fore trochanter ochraceous with fuscous mark medially, middle trochanter ochraceous with fuscous spots proximally and centrally on anterior, hind trochanter ochraceous. Fore femur tawny striped with ferruginous with proximal and distal fuscous spots anteriorly and posteriorly, with piceous primary spine against femur, larger, upright piceous secondary spine, and small, distal flattened extension. Middle femur tawny striped with ferruginous and ringed with fuscous near proximal and distal ends, hind femur tawny striped with ferruginous ringed with fuscous near distal end. Tibiae fuscous, ringed with tawny near proximal end and at about one-third distance from proximal terminus, tibial spurs and comb castaneous with fuscous tips. Tarsi fuscous, mesotarsus and pretarsus tawny proximally, pretarsal claw tawny with fuscous tips. Tawny areas greenish and coxae and trochanter striped with ferruginous in some paratypes.

Operculum.—Male operculum ochraceous with fuscous base covered in silvery pile, reaching to anterior margin of sternite II. Lateral margin curved into rounded posterior margin, medial margin rounded not meeting centrally, anteromedial margin straight angled lateral and curving anteriorly at base. Meracanthus ochraceous.

Abdomen.—Tergites ferruginous with tawny posterior and green hind margin, lateral tergite 2 and margin to timbal cavity tawny, fuscous spots on lateral tergites 3–7 becoming larger in posterior segments, posterolateral green spot in tergites 3–8 becoming larger in posterior segments, green faded to ochraceous in some paratypes. Timbal cover incomplete exposing timbal anteriorly and dorsally, fuscous with tawny margins. Posterior timbal cavity with straight margin, angled slightly anteriorly, curving to triangular apex of timbal cover. Timbal with four ribs and two spots. Silvery pile dorsally, more dense laterally and in some paratypes. Sternite I tawny, sternite II ochraceous with fuscous posterior margin, sternite III ochraceous, sternite IV ochraceous with transverse lateral fuscous marks, sternite V fuscous with ochraceous posterior, sternite VI fuscous with posterior ochraceous margin, sternite VII fuscous, sternite VIII tawny with elongate triangular fuscous mark on ventral base. Epipleurites fuscous with tawny posterior margin. Silvery pile on sternites, additional longer pile on sternite VIII.

Genitalia.—Pygofer tawny basally with fuscous stripe on laterodorsal surface terminating on distal shoulder and lateral surface reaching posterior margin, greenish ochraceous posterolaterally and between fuscous marks, distal shoulder with small angled point dorsally. Dorsal beak absent, anal styles tawny ringed with fuscous. Pygofer upper lobe ochraceous, short, rounded, interior to lateral pygofer. Median uncus lobe short, recurved dorsally forming a V-shaped groove ventrally for tubular castaneous and tawny aedeagus. Lateral uncus lobes longer, flattened distally, bent ventrolaterally at approximate right angle when viewed from side, widest near base, lateral side angled more sharply to rounded apex. Aedeagus castaneous with expanded tawny membrane and castaneous recurved spine at terminus.

Measurements (mm).— N = 8, mean (range). Length of body: 12.6 (11.5–13.4); length of forewing: 16.4 (14.6–17.8); width of forewing: 5.7 (5.2–6.2); length of head: male 2.1 (1.9–2.3); width of head including eyes: 4.1 (3.8–4.3); width of pronotum including suprahumeral plates: 4.8 (4.3–5.5); width of mesonotum: male 4.4 (4.1–4.8).

Notes. — Proarna parva sp. n. is from the Yunga and Chaco floristic provinces ( Sanborn et al. 2011a).

Figures

FIGURE 3. Proarna parva Sanborn & Heath sp. n. (A) Holotype male habitus. (B) Holotype male dorsum. (C) Holotype male timbal cover. (D) Holotype male operculum. (E) Holotype male lateral view of genitalia. (F) Holotype male posterior view of genitalia. Scale for A = 2 cm, B = 2 mm, and C–F = 1 mm.