Prasinosoma medialinea 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 : 16-19

Prasinosoma medialinea Sanborn & Heath , sp. n.

( Figure 4 )

Prasinosoma medialinea nom. nud. Sanborn et al. 2011a, p. 4, 5. 7, Fig. 3 , Tables 1 –2.

Type material.— ARGENTINA. HOLOTYPE: male ( INHS), “ Corrientes / Corrientes ca. airport / 23 Dec. 1986 / J.E. & M.S. Heath & / Al Sanborn Coll.” . PARATYPES: seven male same data as holotype ( MSHC) ; four male “ Corrientes / 12.5 km W of Scorza / Cué. 23 Dec. 1986 / J.E. & M.S. Heath & / Al Sanborn Coll.” (three male MSHC, one male AFSC) ; eight male and one female ( AFSC) “ Prov. Corrientes / Ruta 12, 12.5 km West of / Scorza Cué / 13 January 1992 / A. Sanborn & P. Ganter Coll. ” .

Etymology. The species is named for the dark coloration along the dorsum giving the appearance of a medial stripe.

Diagnosis.— Prasinosoma medialinea sp. n. is easily differentiated from the other members of the genus by its coloration pattern as it is the only species with significant marking. Prasinosoma fuembuenai Torres, 1963 and P. inconspicua (Distant, 1906) are completely green without obvious markings and P. heidemanni (Distant, 1905) is green with a transverse black mark across the head.

Description

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

Head.—Head about 1.07X as wide as mesonotum, green with transverse piceous mark between eyes with fuscous lateral ends through lateral ocelli. Mark extends anteriorly to encompass median ocellus reaching frontoclypeal suture on midline, spot on posterior head between posterior cranial depression and eye green. Anterior extension of mark varies from reaching the posterior half of the median ocellus to reaching entire transverse frontoclypeal suture in paratypes, fuscous only medial to lateral ocelli in some paratypes, fuscous spot on medial supra-antennal plate in some paratypes. Head tawny posterior to eye. Ocelli rosaceous, eyes golden. Long silvery pile posterior to eye and on ventral head, dorsum covered with short silvery pile and ventral pile more dense in some paratypes. Postclypeus fuscous centrally, ventral lateral surfaces and posterior ventral margin tawny, medial green line from frontoclypeal suture to ventral apex surrounded by piceous near apex, rounded anteriorly, centrally sulcate with 10 transverse grooves and silvery pile laterally. Anteclypeus fuscous with medial anterior margin tawny covered with silvery pile. Proximal half of rostrum greenish tawny becoming fuscous with piceous tip, reaching to posterior hind coxae. Gena tawny with central piceous spot that extends laterally to margin of eye. Lorum fuscous. Antennae fuscous except tawny annulus on distal scape.

Thorax.—Pronotum green with medial fuscous mark that expands anteriorly and slightly posteriorly, lighter at level of medial paramedial fissures, small piceous spots in ambient fissure on either side of midline, fuscous lateral ambient fissure and fuscous mark on anterior of pronotal collar lateral angle, slightly tawny within paramedian and lateral fissures. Piceous marks in ambient fissure fuse, markings in paramedial and lateral fissures darken, central marking reduced and light fuscous marks on disc in some paratypes. Mesonotum tawny, green laterally, submedian sigilla fuscous, lateral sigilla fuscous anteriorly spotted with fuscous posteriorly, central fuscous stripe terminating anterior to cruciform elevation, marks reduced or lightened in some paratypes. Scutal depression and transverse mark across anterior arm of cruciform elevation piceous. Silvery pile laterally, posteriorly, between anterior arms of cruciform elevation and lateral cruciform elevation, short silvery pile on disc in some paratypes. Wing groove tawny with long white pile. Metanotum tawny posteriorly, piceous anteriorly, with long white pile posteriorly. Ventral thoracic plates tawny, except greenish episternum 2 and fuscous basisternum 2, central spot in katepimeron 2 and medial episternum 3, meron 2 darker in some paratypes. Venter covered with dense silvery pile.

Forewing and hind wings.—Hyaline. Venation green becoming testaceous distally except tawny subcostal vein past node. Piceous spot on arculus along radial cell and middle of anterior basal cell vein, infuscation on radial and radiomedial crossveins. Basal cell clouded with tawny. Basal membrane gray. Hind wing venation greenish except ochraceous median vein, testaceous radius posterior, and radius anterior, venation all green in some paratypes. Vanal fold, anal cell 3, anal cell 2 along anal veins 2 and 3, anal cell 1 along anal vein 2, base of cubital cell 2 and base of medial cell grayish.

Legs.—Fuscous marked with green and tawny. Fore coxae with green angles, coxae tawny medially and distally. Trochanter tawny medially and posteriorly. Fore femur fuscous with lateal green stripes expanding centrally, primary spine against femur, larger, upright secondary spine, and very small tertiary spine, spines fuscous on fuscous ridge. Middle and hind tibiae fuscous anteriorly, tawny posteriorly and distally. Fore tibiae fuscous, distal middle tibiae, and distal end of hind tibiae fuscous, proximal areas green in middle and hind tibiae, tibial spurs and combs castaneous with tawny base. Tarsi fuscous. Pretarsal claw fuscous with piceous tips.

Operculum.—Male operculum tawny with fuscous spot on medial and lateral base and region against meracanthus, not reaching posterior margin tympanal cavity. Lateral margin straight, slightly angled medaid, posterior margin curved, medial margin rounded, medial margins not touching, anteromedial margin angled laterally then sharply medially to base at level of medial meracanthus. Meracanthus ochraceous with fuscous spot on anterior base. Operculum covered with silvery pile. Female operculum with angled lateral margin, posterior margin slightly curved to base, reaching to anterior of sternite II posteriorly and lateral meracanthus medially. Meracantus ochraceous with fuscous spot on base, longer than operculum.

Abdomen.—Dorsal tergites tawny, lighter anteriorly, marked with green laterally and fuscous medially. Tergite 1 tawny with fuscous lateral spots and green posterior margin. Tergite 2 tawny with green dorsolateral surface. Tergites 3–7 tawny with fuscous medial mark, tergite 8 tawny, female tergite 8 with fuscous medial mark, tergites 7 and 8 with green posterior margin. Timbal with 3 ribs. Tergites covered with silvery pile, more dense laterally, black pile on fuscous medial spots on tergites 3–7. Sternite I ochraceous with anteromedial fuscous spot, sternite II tawny with fuscous posterior margin, sternites III–VIII and epipleurites tawny. Silvery pile on lateral sternites, long golden pile on posterior sternite VIII. Sternites with reduced fuscous area between sternites II and III and white pubescense laterally in some paratypes.

Male genitalia.—Pygofer tawny dorsolaterally, fuscous dorsally with green on dorsal shoulder. Distal shoulder rounded, upper pygofer lobe very small smooth transition to posterior margin of pygofer. Dorsal beak absent, anal styles tawny. Median uncus lobes recurved dorsally. Lateral uncus lobes longer, median margin rolled laterally and bent ventrolaterally, approximate right angle when viewed from side, expanding then constricting to point at terminus. Aedeagus castaneous with tawny membrane and castaneous semi-circular hook on terminus.

Female genitalia.—Sternite VII tawny, dark tawny lateral spots, posterior margin with medial notch, lateral posterior margins rounded. Abdominal segment 9 tawny dorsally with posterior fuscous spot and lateal fuscous spot, green dorsolateral posterior spot, ochraceous ventrally, covered with silvery pile. Ochraceous region may have faded from green. Anal styles tawny, dorsal beak absent. Gonocoxite IX tawny. Gonapophysis VII and X dark tawny with fuscous tip, long golden pile on gonapophysis X. Ovipositor sheath extending to level of abdominal segment 9 dorsum.

Measurements (mm).— N = 20 males or 1 female, mean (range). Length of body: male 13.0 (12.3–13.9), female 13.5; length of forewing: male 16.2 (15.0–17.4), female 17.4; width of forewing: male 5.6 (5.4–6.0), female 5.4; length of head: male 2.2 (2.1–2.3), female 2.1; width of head including eyes: male 4.5 (4.3–4.8), female 4.3; width of pronotum including suprahumeral plates: male 4.8 (4.4–5.2), female 4.8; width of mesonotum: male 4.2 (3.9–4.4), female 4.0.

Notes. — Prasinosoma medialinea sp. n. is from the transitional grasslands of the western Paranense and eastern 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.

FIGURE 4. Prasinosoma medialinea Sanborn & Heath sp. n. (A) Holotype male and paratype female habitus. (B) Holotype male dorsum. (C) Holotype male timbal cover. (D) Holotype male operculum. (E) Paratype female operculum. (F) Holotype male lateral view of genitalia. (G) Holotype male posterior view of genitalia. (H) Paratype female lateral view of genitalia. (I) Paratype female ventral view of genitalia. Scale for A = 2 cm, B = 2 mm, and C–I = 1 mm.