Priasthenopus gilliesi ( Dominguez ) Molineri, Carlos, Salles, Frederico F. & Peters, Janice G., 2015

Molineri, Carlos, Salles, Frederico F. & Peters, Janice G., 2015, Phylogeny and biogeography of Asthenopodinae with a revision of Asthenopus, reinstatement of Asthenopodes, and the description of the new genera Hubbardipes and Priasthenopus (Ephemeroptera, Polymitarcyidae), ZooKeys 478, pp. 45-128 : 67-68

Taxon classification Animalia Ephemeroptera Polymitarcyidae

Priasthenopus gilliesi ( Dominguez) comb. n.

Asthenopus gilliesi Domínguez 1988: 21; Hubbard and Domínguez 1988: 207; Domínguez et al. 2006: 562

Material.

Paratype male (IFML TEPH095, slide 041) from URUGUAY, Artigas, San Gregorio, orillas río Uruguay, 29.xi.1959, light trap, C.S. Carbonell col.; 5 male imagos (slide IBN141CM) and 1 male and 1 female (slide IBN471CM) subimagos (IBN) from COLOMBIA, Amazonas, P. N. Amacayacu, río Amacayacu, 93 m, S 3°48'28" − W 70°15'21", 3.ii.1999, light trap 18−20 h PM, E. Domínguez, M.C. Zúñiga & C. Molineri cols.; 5 male imagos and 1 female subimago (IBN) from BOLIVIA, Santa Cruz, near Once Por Ciento, río Blanco, 250 m, S 15°21'39.7" − W 63°17'28.8", 14.vi.2000, light trap, E. Domínguez col.; 1 female adult (CZNC) from BRAZIL, Rio N. Aripuanã, Rio Juma, Ig. Campineiro Gde., 8−9.ix.2004, Pennsylvãnia light trap; and 2 male imagos (CZNC) from Amazonas, Barcelos, rio Demene, ´boca´barco, 8−9.viii.2009, Pennsylvania light trap.

Diagnosis.

Priasthenopus gilliesi is known from adults of both sexes and eggs, and is the only species known in the genus. The characters useful to distinguish it from other Asthenopodinae are listed in the generic diagnosis.

Male imago. See generic section above and original description in Domínguez (1988).

Female subimago. Length (mm): body, 6.5; FW, 8.9; HW, 3.3; cerci, 1.5. General coloration yellowish white with gray markings. Head cream extensively shaded gray dorsally, the shading is uniform anteriorly but in the form of a fine netted pattern posteriorly to lateral ocelli, occiput with a pair of submedian pale anterior spots and a pair of submedian dark posterior spots; venter of head whitish. Antennae yellowish white shaded with gray on scape and pedicel. Thorax cream. Anterior ring of prothorax very thin, less than 1/4 the dorsal length of posterior ring; ratio width/length: 2.6; pronotum shaded blackish on median area except pale medial line, presternum paler, shaded gray before coxa. Mesonotum shaded very diffusely with gray, darker on longitudinal carinae and between posteroscutal protuberances; mesosternum and pleurae paler, shaded gray on anterior corner of katepisternum. Metanotum shaded gray on posterior half, except on a pale median triangular mark, shaded darker posteriorly to this pale mark; metasternum whitish. Legs whitish except coxae yellowish shaded gray and apex of hind trochanter pointed and yellowish orange. Wings (Figs 8 H–I). Membrane of fore and hind wings slightly shaded with light brown, veins translucent shaded with light brown, markedly on larger veins (C, Sc, Rs); marginal intercalaries relatively long (Fig. 8H), MP1 fused with MP2 at base; 2 crossveins present between M and R stems basally to Rs fork. Abdomen whitish, shaded with gray dorsally and darkening posteriorly, shading on terga interrupted on medial paler line, this line is wide on terga 1-4, narrows posteriorly on 5-7, thin on 8, and widens posteriorly on 9-10; sterna whitish translucent except gill sclerites yellowish white; sternum 8 with anteromedian pair of relatively large sockets (Fig. 8J). Cerci whitish, about 0.2 the length of FW.

Eggs. See generic description.

Distribution.

This species presents a wide geographic range that spans from the Amazon River in the North to the Uruguay River in the South, also extending towards the West in Bolivian Chiquitania.

Discussion.

Priasthenopus gilliesi male imagos were adequately described by Domínguez (1988), females and eggs are described here for the first time. There are no morphological differences between the male imagos examined from the different localities, except for the penes of the Colombian males are slightly stouter, and those from the Bolivian males are slightly slender than the penes of the Uruguayan types. In the forewings, vein MP1 is basally free except on Bolivian males where this vein tends to fuse with MP2, although not completely.