Ariasa bartletti, Sanborn, 2016

Sanborn, Allen F., 2016, Generic redescription, two new species, and a key to the species of the cicada genus Ariasa Distant, 1905 with the description of a new genus (Hemiptera: Cicadidae: Cicadinae: Fidicinini), Zootaxa 4137 (4), pp. 501-519 : 507-511

Ariasa bartletti n. sp.

( Fig. 2 )

Type material. Holotype. “ PERU Madre de Dios / nr Puerto Maldonado / Posadas Amazonas / S12 48.115 W69 18.019 / 609ft;(30–IX)–(3–X)–2004 / C R Bartlett ” female ( USNM). Paratypes. Same data as holotype, two females ( UDCC); one male and one female ( AFSC); “ PERU Madre de Dios / nr Puerto Maldonado / Posadas Amazonas / lodge@ Rio Tambopata / S12 48.115 W69 18.019 / 609ft;(7–10)– X–2004 / C R Bartlett ” one female ( UDCC) (this specimen is missing the left wings and the right wings are detached but it was captured with a net and has all its pile and pubescence giving a better representation of the species than those specimens captured in light traps so it is included in the type series). A female was chosen as the holotype based on the apparent preference for females to be attracted to light traps as has been seen in some other cicadas ( Young & Sanborn 2015) and thus will be the most likely sex to need determination.

Etymology. The species is named for Charles Bartlett who collected the type series and has provided numerous specimens to the author over the years.

Description. Ground color castaneous marked with black and tawny. One of the paratype female specimens is tinged with green and the male paratype is darker with more expansive black markings. These two specimens appear to have been captured with a net rather than in the light traps so there is no discoloration due to the preservative fluid and are covered with more dense pile.

Head. Head wider than mesonotum, longitudinal black mark on either side of medial epicranial suture extending from posterior of head, widening to enclose the lateral ocellus, and extending medially to the frontoclypeal suture, mark angles anterolaterally to anterior vertex lateral to supra-antennal plate, continuing on ventral head laterally to eye where the mark splits and encircles the eye. Vertex lighter lateral to lateral ocelli and on anterior margin. Supra-antennal plate tawny with black spot on anteromedial margin. Covered with short silvery pile dorsally, longer silvery pile posterior to eye. Ocelli rosaceous, eyes castaneous. Ventral head ground color with transverse black mark between antenna and eye. Lorum black except castaneous spot on anteromedial region and lateral posterior margin. Thick white pubescence and long white pile on lorum and gena. Postclypeus centrally sulcate, sulcus with elongated tawny spot on dorsum and apex, black on ventral sulcus and within transverse grooves, transverse ridges castaneous. Postclypeus with thirteen transverse grooves, short golden pile on dorsum, thick white pubescence and long silvery pile on lateral postclypeus. Anteclypeus black with elongated castaneous mark on anterior three fourths of midline covered with thick white pubescence and long silvery pile. Mentum tawny with small lateral black spot near apex, labium proximal half tawny striped with castaneous, darkening to piceous tip reaching to hind trochanters with sparse short silvery pile. Antennae black except for castaneous annulus on proximal scape.

Thorax. Dorsal thorax castaneous. Pronotum with black mark on either side of midline angled laterally towards anterior extending from ambient fissure to medial pramedian fissure. Elongate transverse black spot on either side of anterior midline. Black within anterior two thirds of lateral fissure, black mark in paramedian fissure continuing in ambient fissure to encircle disc. Pronotal collar ground color. Pronotum covered with short silvery pile, sparse short black pile on disc between medial ends of paramedian and lateral fissures. Mesonotum castaneous, lighter along parapsidal suture, along midline and connecting to cruciform elevation, wing groove black with tawny lateral margin, triangular black marks on anteromedial lateral sigilla and medial submedian sigilla, posterior submedial sigilla black, medial lanceolate mark, scutal depression and spot anterior to anterior arm of cruciform elevation near terminus black. Marks in submedial sigilla connected by incomplete fascia. Mark in lateral sigillae extends laterally along anterior margin in male paratype. Mark anterior to anterior arm of cruciform elevation extends across anterior arm in some paratypes. Male paratype with white pubescent spot on anterolateral margin of mesothorax. Lateral and submedial sigillae dark castaneous in some paratypes. Metanotum black with castaneous posterior margin. Long, dense silvery pile on mesonotum laterally and posteriorly and between arms of cruciform elevation, in wing groove, and on posterior metanotum, shorter silvery pile on dorsal surface. Ventral thoracic segments castaneous except black katepisternum 2, basisternum 2, meron 2, and episternum 2 with long and short white pile.

Wings. Fore wings and hind wings hyaline with eight and six apical cells respectively. Venation castaneous, costa tawny to node, becoming black distally, proximal third of median vein, arculus, proximal third of cubitus anterior, cubitus posterior + anal vein 1, and anal vein 2 + 3 castaneous. Basal cell black with castaneous mark at base, basal half of clavus black. Pterostigma to one third the length of apical cell 1. Basal membrane of fore wing black, greenish in male paratype. Venation of hind wing tawny except green median vein, distal half of cubitus posterior, and middle of anal vein 2, ambient vein, distal radius posterior, and median veins 1 and 2 black. Black mark at base of cubital cells 1 and 2. Anal cell 3 and anal cell 2 along anal vein 3 dark gray, anal cell 1 and 2 along anal vein 2 dark gray. Base of cubital cell and medial anal cell 3 whitish green.

Legs. Legs light castaneous, with darker regions on lateral coxae and black on medial coxae, darker spot on medial proximal trochanter and majority of distal trochanter, and femora striped with castaneous. Fore femora with proximal spine oblique, secondary spine largest and upright and small tertiary spine, all castaneous and connected by a black fascia. Fore tibiae proximally tawny then black, middle and hind tibiae castaneous with distal end black. Tarsi black, tibial spurs and comb dark castaneous.

Operculum. Female operculum with angled posterolateral margin, terminating medially at middle meracanthus reaching to posterior of sternite I, tawny with a black base and castaneous spot lateral to meracanthus, covered with white pubescence and short white pile radiating from margin. Black cover basal half in one paratype. Female meracanthus as long as operculum, tawny with a black spot on base. Male operculum triangular with smoothly rounded posterolateral margin, reaching to anterior of sternite II, tawny with black base, covered with thick white pubescence and silvery pile radiating from margin. Medial margin extending to medial meracanthus not covering tympanal cavity medially. Meracathus pointed, tawny with a black spot on base not reaching beyond opening of tympanal cavity and covered with thick white pubescence.

Abdomen. Abdomen castaneous with dark transverse mark on anterolateral tergite 2 and dorsolateral tergite 3, covered with long silver and black pile, especially dense laterally. Pile more dense in male and female partypes captured with net. Black pile more dense on anterolateral tergites 2–4, medial tergites 3, 7 and 8, and dorsolateral tergite 4–8 forming a black arch on the dorsal surface. Paratype male tergites with transverse black and castaneous anterior. Female abdominal segment 9 with castaneous dorsolateral surfaces and stigma , tawny ventrally and posteriorly, with dense, long, golden pile. Posterior margin of abdominal segment 9 sinuate, black fascia on dorsolateral surface not reaching posterior margin, a small black spot on either side of base of dark castaneous dorsal beak, connected across midline in one paratype. Timbal cover incomplete exposing timbal dorsally, anterior margin of tergite 2 curved posteriorly with silvery pile, angled at dorsal base and slightly arching to rounded anterior apex, ventral margin straight and parallel to long body axis. Sternites and epipleurites tawny except black anteromedial sternite I and black marks on anterolateral epipleurites, larger on epipleurites 4–6. Male paratype also has dark castaneous mark along anteromedial margin across sternite II and across the middle of sternite VII and some female paratypes also have a mark across sternite II and the posterior margin of sternite VII. Female sternite VII with sinuate posterior margin and medial notch, lateral margin arching posteriorly. Male sternites II– VII translucent. Sternites and epipleurites with long silvery pile, more dense laterally and posteriorly, shorter pile radiating from posterior margin. White pubescence, dense laterally, in paratype male and female collected by net.

Genitalia. Female gonapophyses VIII and IX black extending beyond dorsal beak with long radiating golden pile. White pubescence on gonapophyses in some paratypes. Gonocoxite IX tawny. Anal styles castaneous.

Male pygofer dark castaneous at base, black in middle and tawny posterior margin, dark tawny between pygofer basal lobes, with rounded distal shoulder, dorsal beak absent, with long silvery pile laterally. Pygofer basal lobe indistinct, pygofer upper lobes castaneous, elongated, separated from pygofer, flattening and twisting to curved apex, short golden pile radiating medially at base. Anal styles black, anal tube tawny. Median uncus lobes black with tawny midline, flattend laterally with rounded apex and slightly upturned at posterior terminus , lateral uncus lobe black, tawny laterally, ventral side with tawny triangular extension, basal lateral uncus lobes rounded meeting medially, long golden pile radiating dorsally and laterally. Aedeagus tubular, dark castaneous.

Measurements (MM). N = 1 male or 5 females, mean (range). Length of body: male 34.6, female 33.60 (32.7– 35.0); length of fore wing: male 46.9, female 47.40 (45.9–48.5); width of fore wing: male 13.3, female 13.30 (13.0–13.6); length of head: male 5.6, female 5.86 (5.5–6.2); width of head including eyes: male 13.1, female 13.84 (13.4–14.1); width of pronotum including suprahumeral plates: male 13.1, female 13.70 (13.1–14.0); width of mesonotum: male 11.3, female 11.80 (11.4–12.4).

Diagnosis. The lateral red abdomen promptly distinguishes A. nigrorufa from the new species. Similarly, the lateral ochraceous areas of the abdomen, ochraceous pronotal collar and costal margin distinguish A. arechavaletae from the new species. The white basal area of the hind wings and unicolorous dorsal abdominal segments are unique to A. albiplica . The smaller body size (19 mm vs greater than 32.5 mm) simply distinguishes A. diupsilon and A. urens from the new species. The green and brown body, the white pubescent spots lateral to the genitalia, and smaller body size (about 28 mm) simply distinguish A. alboapicata from the new species. The smaller body size (about 28 mm), black basal cell of the fore wing, and primarily black mesothorax distinguish A. nigrovittata from the new species. The new species can be distinguished from both A. colombiae and A. albimaculosa n. sp. by the more expansive black markings on the mesothorax, the black markings on the adominal tergites crossing the midline and not forming an arch on the dorsal surface, and the basal cell for the fore wing is not black in these species. The transverse band on the head is complete between the epicranial suture and eye, the basal cell of the forewing is black in the distal region only, the pronotal collar is marked with green and a rounded uncal extension is folded under the uncus in A. egregia . The abdominal tergites are mostly black rather than being mainly tawny or castaneous, the pronotal collar is marked with green rather than being castaneous, the basal cell of the fore wing is marked with green proximally rather than being completely black, and the uncus terminus is flattened and bulbous in A. maryannae rather than being rounded as in the new species. The abdominal tergites are mostly black, including completely black tergites 1 and 2, rather than being mainly tawny or castaneous, abdominal sternites are heavily marked with black rather than being tawny, the basal cell of the fore wing is marked with tawny proximally rather than being completely black, and the uncus terminus is upturned at the terminus in A. russelli rather than being straight as in the new species. The most similar species in general appearance to the new species is A. bilaqueata . The new species has more dense pile, particularly on the lateral mesonotum and on the abdomen, the triangular extension in the middle of the ventral uncus is about one fifth the length of the uncus and upright seen as a triangle in lateral view, and female abdominal segment 9 dorsal surface is straight with a slightly upturned dorsal beak while the triangular extension in the middle of the ventral uncus is about one third the length of the uncus and folded mediad so it is not seen in a lateral view and female abdominal segment 9 is smoothly arched dorsally in A. bilaqueata .

Distribution. The species is known only from the type series collected in Peru.

Figures

FIGURE 2. Ariasa bartletti n. sp.: A, holotype female and paratype male habitus; B, holotype female dorsum; C, holotype female operculum; D, paratype male operculum; E, paratype male timbal cover; F, paratype male lateral view of genitalia; G, paratype male posterior view of genitalia; H, holotype female lateral view of genitalia; I, holotype female ventral view of genitalia. Scale bar: A, 2 cm; B, 5 mm; C – E, 2 mm; F – G, 1 mm; H – I, 2 mm.