Nuvol Navas , 1916

Sosa-Duque, Francisco Jose & Tauber, Catherine A., 2023, Discovery and redescription of the true Nuvol umbrosus Navas and naming of a new Nuvol species (Neuroptera, Chrysopidae, Leucochrysini), ZooKeys 1158, pp. 179-193 : 179

Genus Nuvol Navas, 1916

Type species.

Nuvol umbrosus Navás, 1916.

Known geographic distribution.

South America: Brazil (Amazonas, Rondônia, Minas Gerais, Rio de Janeiro).

Generic diagnosis.

Based on a small number of specimens from two species:

N. umbrosus - one specimen of unknown sex described by Navás (1916) and one male described here.

N. satur - two females described by Tauber and Sosa (2015, as N. umbrosus ).

Medium to large lacewings, forewing length 14.8-17.0 mm. Head, pronotum with longitudinal black stripes or diffuse reddish marks; setae long. Legs unmarked; claws basally dilated. Forewing marked with faint to dark yellowish-brown transverse streaks through center and margins of wing; costal area narrow throughout; costal setae short, inclined; stigma marked with one to two small dark spots; Sc and R well separated throughout; R extended apically, curving posteriorly around wing apex; terminal subcostal and radial veinlets at apex of wing largely unforked, darkly marked; im short, broadly ovate; Rs almost straight, parallel to R; radial cells short, height relatively uniform from base to below stigma; gradate veins arranged in two roughly parallel series; outer gradates closely aligned, flowing smoothly from PsM; inner gradates extending basally, not meeting PsM; four intracubital cells, with icu1, icu2, icu3 closed, icu4 (dcc) open. Hindwing venation, markings similar to forewing.

Possible additional generic features, with supporting evidence from only one species and/or one specimen: Antennae very long (over twice length of forewing). Female: T9+ect separated dorsally by longitudinal groove. Spermatheca doughnut shaped, with elongate narrow spermathecal duct, substantial, sail-like velum opening directly to bursa copulatrix via dorsal slit. Bursa copulatrix with delicate membrane, elongate bursal glands. Subgenitale substantial, with bilobed knob protruding from broad triangular base. Male: T9+ect with prominent, heavily sclerotized, bifurcated dorsal apodeme: with dorsal spur extending upward behind and well above callus cerci, with ventral branch extending distally, protruding as lobe well beyond distal margin of ectoproct. T9+ect fused dorsally; callus cerci round to very slightly oval, dark against pale background. Sternites S8, S9 weakly fused, with conspicuous cleft or suture scars. Gonarcus well sclerotized, widely arcuate; bridge broad, curved, with pair of elongate ventral projections extending ventrally; gonocornua long, broad. Mediuncus bulbous basally, with slender terminus, membranous dorsal attachment to gonarcal bridge, lateral attachments to inner sides of ventral projections of gonarcus.