Haplohyphes aquilonius Lugo­Ortiz & McCafferty

Molineri, Carlos, 2003, Haplohyphes (Ephemeroptera: Leptohyphidae), new species and stage descriptions with a key to separate the species of the genus, Zootaxa 263, pp. 1-11 : 2-4

Haplohyphes aquilonius Lugo­Ortiz & McCafferty ( Figs. 1­4 )

H. aquilonius Lugo­Ortiz & McCafferty, 1995: 166 ; Molineri 1999: 29.

Male imago. Length: body, 4.7­5.2 mm; fore wings, 5.5­6.7 mm; hind wings, 1.0­ 1.1 mm. General coloration yellowish chestnut, abdomen whitish. Head shaded with grayish brown except behind median ocellus, ventrally paler. Antennae: scape and pedicel whitish shaded with gray, flagellum hyaline. Thorax. Pronotum yellowish white shaded with gray except on 5­6 oval marks at lateral zones. Mesonotum yellowish orange shaded with gray, mesoscutellum darker; membranous filaments very short, grayish. Metathorax paler. Legs: coxae, trochanters and femora yellowish, tibiae and tarsi whitish, shaded diffusely with gray. Wings ( Figs. 1 a­c): membrane hyaline, tinged with yellowish; longitudinal veins grayish brown, cross veins yellowish; hind wings with 3 longitudinal veins ( Figs. 1 b­c). Abdomen whitish translucent, except segments IX­X yellowish white; abdomen shaded completely with yellowish gray except on a mediolongitudinal paler band. Genitalia ( Fig. 4 ): styliger plate yellowish, penes and forceps whitish. Caudal filaments whitish translucent shaded with gray.

Female imago. Length: body, 5.5 mm; fore wings, 7.8 mm; hind wings, 0.85 mm. General coloration yellowish chestnut. Head and thorax as in male except shaded with blackish. Wings ( Figs. 2 a­c) as in male. Abdomen as in male except shaded with gray more heavily.

Mature nymphs. Length: body, 6.5­9.0 mm; mesonotum, 2.0­ 2.4 mm; hind femur, 1.2­ 1.6 mm; caudal filaments, 5.0­6.0 mm. General coloration grayish brown, ventrally paler. Head yellowish white shaded with gray as in Fig. 3 . Thorax. Fore wingpads yellowish shaded with gray along costal margin and longitudinal veins (some times shaded more extended). Abdomen yellowish gray except membranes whitish. Terga shaded with gray heavier toward rear segments, with 1­2 paler mediolongitudinal bands.

Material. COLOMBIA, P. N. Ucumari, La Cascada, 2460 m (20 nymphs); P. N. Farallones de Cali, Peñas Blancas, río Pichinde, N 03° 25' 45" ­ W 76° 39' 27", 17­18/III/1999, light 4­6 hs AM, M. C. Zúñiga, E. Domínguez and C. Molineri Cols. (5 male and 1 female imagos); dept. Valle, río Melendez, El Cruce, 1580 m, 17/IX/1992 (1 nymph); idem except La Candelaria, 1600 m, 22/VIII/1992 (4 male and 3 female subimagos); Valle, río Cali, Felidia, 1645 m, 18/IX/1992 (1 male and 4 female subimagos); idem except Pichinde, 1600 m, 5/XI/1992 (2 nymphs, 2 male and 2 female subimagos). All the material housed in MEUV, except 3 male imagos, 3 female subimagos and 15 nymphs in IFML. The nymphs are only tentatively associated with the adults, because they share general coloration and size, and were collected in the same localities.

Discussion. Haplohyphes aquilonius was described from seven Costa Rican nymphs by Lugo­Ortiz & McCafferty (1995). These authors stated that these nymphs could represent the unknown nymphal stage of H. mithras , described from imagos, also from Costa Rica. Newly collected adults and associated nymphs from Colombia, assignable to H. aquilonius , show marked differences with H. mithras .

H. aquilonius can be distinguished from the others species of the genus by the following combination of characters. In the imago: 1) three longitudinal veins present on hind wings ( Figs. 1 c, 2c); 2) segment 1 of forceps slightly shorter than segment 2 ( Fig. 4 ); 3) penes divided on apical 0.34­0.40 ( Fig. 4 ); 4) membranous lobes of penes obliquely truncated at apex ( Fig. 4 ); 5) apical spines of penes shorter than membranous lobes; 6) male fore wing length 5.5­6.7 mm; 7) abdomen uniformly shaded with gray. In the nymph: 1) fore wingpads shaded with gray at least along entire costal and subcostal areas; 2) head shaded with gray as in Fig. 3 .

Figures

FIGURES 1 ­ 19. Haplohyphes aquilonius Lugo­Ortiz and McCafferty: 1 a, male fore wing; 1 b, male hind wing; 1 c, idem, detail; 2 a, female fore wing; 2 b, female hind wing; 2 c, idem, detail; 3, nymphal head, d. v.; 4, male genitalia, v. v. H. dominguezi sp. nov.: 5 a, male fore wing; 5 b, male hind wing; 5 c, idem, detail; 6, male genitalia, v. v. H. huallaga Allen: 7, male hind wing, detail. H. mithras (Traver): 8, male hind wing, detail. H. baritu Domínguez: 9 a, female fore wing; 9 b, female hind wing; 9 c, idem, detail; 10 a, male fore wing; 10 b, male hind wing; 10 c, idem, detail; 11, male genitalia, v. v.; 12, detail of forceps, l. v.; 13, nymphal head, d. v.; 14, gill II, d. v.; 15 ­ 19, gills II­VI, v. v.