Hagenulopsis lipeo, Dominguez, Molineri & Mariano, 2009

Domínguez, Eduardo, Molineri, Carlos & Mariano, Rodolfo, 2009, Revision of the South American species of Hagenulopsis Ulmer and Askola Peters (Ephemeroptera: Leptophlebiidae) with description of six new species, Zootaxa 2142 (1), pp. 29-44 : 36-40

Hagenulopsis lipeo sp. nov. Domínguez, Molineri and Mariano

Male imago ( Fig. 19 ). Length: body, 5.0– 5.8 mm; fore wings, 5.0– 5.6 mm. Eyes: upper portion grayish brown meeting dorsally, basally contiguous; facets small and numerous ( Figs. 20–21 ). Facets of lower portion black, small. Head yellowish brown with black markings close to base of eyes. Ocelli whitish, lateral ocelli twice the size of the median one. Antennae: scape yellowish white, pedicel brownish [flagellum broken off and lost]. Thorax. Nota and pleurae reddish brown with carinae darker and whitish membranes; sterna yellowish brown with whitish membranes. Leg I yellowish heavily washed with black specially on femora, tarsi lighter; legs II–III with coxae and trochanter yellowish white, remainder segments yellowish washed with black specially at apex of femora; longitudinal lighter line on femora II–III; claws in all legs yellowish washed with black. Wings membrane hyaline uniformly tinted with light brown, veins brownish lighter toward apex, pterostigma clouded white ( Fig. 37 ); no costal cross veins basad to bulla. Abdomen. Terga yellowish heavily washed with black except on two submedial and two sublateral paler areas close to anterior margin on each terga II to VI; sterna yellowish white washed with black except anterior margin and ganglia; posterior margin of sterna VII–VIII translucid. Genitalia ( Figs. 43–46 ): styliger plate and forceps yellowish brown except inner margins of forceps whitish, penes yellowish white; short styliger plate (ratio maximum width/medial length: 1.95–2.17) with a similar width along its entire length, hind margin straight to slightly concave; first forceps segment curved medially (ratio length F1/styliger: 2.0–2.3) ( Figs. 43–44 ). Caudal filaments, basal half of first segment yellowish brown; rest of filaments yellowish black basally, turning yellowish gradually toward apex.

Female imago. Length: body, 4.4–5.6 mm; fore wings, 5.0– 5.8 mm. Head yellowish brown except base of ocelli blackish, and area between ocelli and eyes whitish. Eyes black. Thorax yellowish brown, sterna yellowish white except darker medially. Some females have lighter wing membranes than the males. Abdomen ventrally with lighter areas covering anterior ¾ of segments II–V; egg guide yellowish black lighter toward apex, apically acute.

Mature nymphs. Female length: body, 5.4–5.6 mm, cerci 3.7–3.9 mm, terminal filament, 4.8–5.0 mm. Male length: body 5.3–5.6 mm, cerci 5.3 mm, terminal filament, 3.6 mm. Head. Eyes of male with reddish black upper portion and blackish lower portion; eyes of female black; ocelli whitish with inner half margin blackish. Antennae: scape yellowish, pedicel blackish, flagellum yellowish lighter toward apex. Dorsum of head yellowish brown stained with black in central area. Mouthparts yellowish stained with black at: base of labrum, basal half of mandibles, outer margin and palpi segment I of maxilla, posterior margin of superlinguae, and submentum; molae of mandible and apical row of setae of maxilla orange brown; anteromedian emargination of labrum with 3 denticles, the median smaller than lateral ones. Thorax. nota yellowish white with latero-medial and latero-posterior areas washed with black; pro- and mesosternum yellowish white with ganglia and margins stained with black, metasternum yellowish white almost completely washed with black except inner margin of articulation of coxae. Leg I light orange yellow with coxa and margins of trochanters washed with black, femur almost completely washed with black except lighter oblicuous line. Legs II and III yellowish with coxa and two longitudinal lateromedial areas on femora, and longitudinal stripe on tibiae blackish; tibiae and tarsi darker than femora, claws orange brown. Tarsal claws with 8–9 denticles. Abdomen dorsally yellowish orange washed heavily with black especially on lateroposterior areas of terga; sterna yellowish with central area tinged with black, lighter in central area. [Posterolateral projection as in minuta description]. Gills whitish with blackish tracheae. Cerci yellowish orange, few setae on each intersegmental union.

Material: Holotype male imago from ARGENTINA: Salta, PN Baritu, Lipeo, estación 5, 13-XI-2004; 98 male and 8 female imagos same data as holotype . Paratypes: 18 nymphs from ARGENTINA: Salta, Parque Nacional Baritu, Lipeo, Aº Los Naranjos , 13-XI-2004, E. Domínguez col. ; 2 nymphs, same data as holotype, except Aº Baritu , 17-XI-2004 . Other material: Jujuy, El Carmen, Aº Las Lanzas , 3-III-2000, Domínguez & Molineri cols. BOLIVIA: Dpto. Santa Cruz, Ichilo Prov. , 10 km NE Hierba Buena Militar, Quebrada El Bronce , 1100 m, 19-IV-1993, E. Domínguez & M. Paco cols. All material deposited at IFML, except 5 male imagos at MZSP and 5 male imagos at MUSENUV .

Etymology: Lipeo, name of the type locality.

Biology: Hagenulopsis lipeo sp. nov. was collected in a small effluent of the Lipeo river, in Salta Province, NW Argentina. The stream was about 3 m wide and between 20 cm to 60 cm deep. The bottom was covered with rocks, with some sandy areas. A mating flight was observed during the morning hours, 1 m above the water course, performing the typical up and down pattern of most leptophlebiid species. It is interesting to note that the pattern does not seem, at least on the main features, to be affected by the dipterous conditions of the specimens. The size of the swarm was approximately 5 m long and 1 m width, and extended for about an hour. A few females were caught among the flying males.

Discussion: This species seems to have a rather extended distribution from NW Argentina to central Bolivia. It has been observed certain variation in the shape of the apex of the male styliger plate ( Figs. 45–46 ), that is due to the angle of observation. It can be separated from the other- species of the genus by the following combination of characters. Imago: 1) general coloration dark (yellowish, heavily washed with black), pattern as in Fig. 19 ; 2 ) eyes of male meeting on -meson of head ( Figs. 20–21 ); 3) first forceps segment not more than 2.3 times length of styliger plate, and curved medially ( Fig. 43 ); 4) hind femora yellowish washed with black, heavier on apical 1/4, with a longitudinal lighter line; 5) cerci dark brown.

Figures

FIGURES 19–24. Hagenulopsis. Figs 19–21, H. lipeo. 19, male imago, general aspect, lateral view; 20, head, dorsal view; 21, head, lateral view. Figs 22–24, H. diptera. 22, male imago, general aspect, lateral view; 23, head, dorsal view; 24, head, lateral view.

FIGURES 37–47. Hagenulopsis. Figs 37–39, male fore wing: 37, H. zunigae sp. nov.; 38, H. esmeralda sp. nov.; 39, H. lipeo. Fig. 40, H. zunigae sp. nov., genitalia, ventral view. Figs 41–42, H. esmeralda sp. nov.: 41, genitalia, ventral view; 42, penes, detail. Figs 43–46, H. lipeo: 43, genitalia, ventral view; 44, penes, detail; 45, apex of styliger plate, ventral view; 46, idem, variation. Fig. 47, H. diptera, male head, dorsal view.

FIGURES 1–6. Askola. Figs 1–3, Askola emmerichi, sp. nov., male imago. 1, general aspect, lateral view; 2, head, dorsal view; 3, head, lateral view. Figs 4–6, Askola paprockii sp. nov., male imago. 4, body, dorsal view; 5, idem, ventral view; 6, head, dorsal view.