Cyrnellus boliviensis, Rueda Martín & Gibon & Sganga, 2021

Rueda Martín, Paola A., Gibon, Francois-Marie & Sganga, Julieta V., 2021, New species and records of the Neotropical genus Cyrnellus (Trichoptera: Polycentropodidae) and the re-establishment of C. minimus and C. marginalis, Zootaxa 5082 (1), pp. 15-29 : 16-18

Cyrnellus boliviensis , new species

Figs 1F–1I

Diagnosis. Cyrnellus boliviensis is closely related to C. fraternus and C. zapateriensis . It differs from these species by the flat section of the subapicomesal spine. In the other species this spine is cone-shaped and has, therefore, a circular basal section.

Description: Adult: Length of each forewing 4 mm. General coloration light brown.

Male genitalia: Anterior margins of sternite IX concave; posterolateral margins of segment IX convex, slightly undulate ( Fig. 1F , ix). Base of each intermediate appendage slightly narrower than median part, apex broad ( Fig. 1F , iap). Each preanal appendage with mesolateral process narrow at base ( Fig. 1F , mlp); dorsolateral process slightly curved, directed distad ( Fig. 1F , dlp); mesoventral process wide at base, gradually thinner toward apex ( Fig. 1F , mvp). Inferior appendages short, angulate, each with apex as nearly as broad as basal part ( Fig. 1F , ia); subapicomesal lobe low, bearing flat, triangular spine with broad base ( Fig. 1G , as); internal lobe rounded ( Fig. 1G , il). Phallus tubular; dorsal phallic sclerite Y-shaped, short, with posterior arms thick and anterior arm thicker and curved ventrad ( Figs 1H, 1I , ds).

Material examined. Holotype: Male : BOLIVIA: Laguna Belen, near Trinidad, 14°27’29’’S, 64°51’41’’W, 26.v.2003 (CBGP).

Paratypes: BRAZIL: Am. Castanho, 101 Km SW Manaus, 25–26.i.1979, O.S. Flint Jr., 1 male (USNM). SURINAM: Corapinerkreen Republick, 9–11.ix.1971, D.C. Geijskes, 1 male (USNM) .

Etymology. The name is a Latin adjective referring to the type country ( Bolivia).

Distribution. Bolivia, Brazil, Surinam.

Figures

FIGURE 1. Cyrnellus spp., male genitalia. 1A–1E, Cyrnellus arotron Flint 1971: 1A, left lateral; 1B, right inferior appendage, ventral; 1C, phallus, left lateral; 1D, dorsal phallic sclerite, dorsal; 1E, dorsal phallic sclerite, left lateral. 1F–1I, Cyrnellus boliviensis sp. nov.: 1F, left lateral; 1G, right inferior appendage, ventral; 1H, phallus, left lateral; 1I, phallus, dorsal. ap = apex of an inferior appendage; asI = subapicomesal spine I; asII = subapicomesal spine II; dlp = dorsolateral process; ds = dorsal phallic sclerite; ia = inferior appendage; iap = intermediate appendage; il = internal lobe; ix = sternite IX; mlp = mesolateral process; mvp = mesoventral process.