Askola

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 : 30-31

Key to separate the imagos of Askola and Hagenulopsis

Males

1. Vein ICu 1 of fore wings joined at base to CuA ( Figs. 25–27 ); penis lobes without ventral spines ( Figs. 28, 31, 34 ) .................................................................................................................................................................. 2 ( Askola )

1’. Vein ICu 1 of fore wings joined at base to CuP ( Figs. 37–39 ); each penis lobe with a ventral spine ( Figs. 40, 42–44 ) ........................................................................................................................................................ 5 ( Hagenulopsis )

2(1). Cross veins of fore wings not surrounded with dark clouds ( Fig 27 )...................................................................... 3

2’. Cross veins of fore wings surrounded with dark clouds ( Figs. 25–26 ) ................................................................... 4

3(2). Fore wing length approximately 7 mm; eyes meeting on meson of head ( Figs. 11–12 ); penes not extending beyond posterior margin of styliger plate (similar to Fig. 31 ); basal 1/3 of forceps brown, remainder paler; general coloration as in Fig. 10 .......................................................................................................................... A. froehlichi

3’. Fore wing length 4.5–5.3 mm; eyes separated on meson of head ( Figs. 8–9 ); penes extending beyond posterior margin of styliger plate ( Figs. 34–35 ); forceps light yellow washed with gray, lighter toward apex; general coloration as in Fig. 7........................................................................................................................ A . cipoensis sp. nov.

4(2). Forceps yellowish-brown, except inner margins whitish; penes extending well beyond the posterior margin of styliger plate ( Figs. 28–29 ); general coloration as in Figs. 1–3 ............................................... A. emmerichi sp. nov.

4’. Forceps whitish, except basal articulation orangeish; penes not extending beyond posterior margin of styliger plate ( Figs. 31–32 ); general coloration as in Figs. 4–6 ............................................................ A. paprockii sp. nov.

5(1). Cross veins of fore wings blackish brown surrounded with dark clouds; dorsal portion of eyes yellowish white ( Figs. 23–24 ); general coloration as in Fig. 22 ........................................................................................ H. diptera

5’. Cross veins of fore wings not surrounded with dark clouds ( Figs. 37–39 ); dorsal portion of eyes darker ( Figs. 14–15, 17–18 , 20–21 ); general coloration not as above .......................................................................................... 6

6(5). Well developed bridge between stalks of upper portion of male eyes ( Fig. 47 ) ....................................... H. minuta

6’. Without well developed bridge between stalks of upper portion of male eyes ....................................................... 7

7(6). Upper portion of male eyes separated on meson of head by a length equal to maximum width of lateral ocellus (distribution: Dominica and St. Lucia) .................................................................................................. H. traverae

7’. Upper portion of male eyes meeting on meson of head ( Figs. 14, 17 , 20, 23 ) ....................................................... 8

8(7). Light colored species, with abdominal segments II–VI translucent white, with black posterolateral spot ( Figs. 16–18 ); first forceps segment long, three times length of styliger plate and straight ( Fig. 41 ) ................................. ................................................................................................................................................ H. esmeralda sp. nov.

8’. Dark colored species, with abdominal segments II–VI heavily washed with black or blackish brown ( Figs. 13 , 19 ); first forceps segment short—not more than 2.3 times length of styliger plate, and curved medially ( Figs. 41–42, 44 ) ................................................................................................................................................................ 9

9(8). Hind femora yellowish washed with black, heavier on apical 1/4, with a longitudinal lighter line; cerci dark brown ......................................................................................................................................................... H. lipeo sp. nov.

9’. Hind femora yellowish with black shading restricted to apical ¼; cerci yellowish .................... H. zunigae sp. nov.

Females 1

1. Cross veins of fore wings blackish brown surrounded with dark clouds; general coloration similar to Fig. 22 .......

1. Askola froehlichi , the only species known from females for the genus, can be separated from the species of Hagenulopsis by the wing characters included in the male key. ..................................................................................................................................................................... H. diptera

1’. Cross veins of fore wings not surrounded with dark clouds ( Figs. 37–39 ); general coloration not as above ........ 2

2(1). Small species, body length 4.0 mm or less; cerci with darker annulations at articulation of three most basal segments .......................................................................................................................................................... H. minuta

2’. Larger species, body length 5 mm or more; cerci without annulations as above ..................................................... 3

3(2). Abdominal sterna much paler than terga .................................................................................................................. 4

3’. Abdominal sterna concolorous with terga ................................................................................................................ 5

4(3). Abdominal terga II–VII with a paler, medial line (only subimago known, distribution: Dominica and St. Lucia) .. .................................................................................................................................................................. H. traverae

4’. Abdominal terga II–VII with a pair of paler submedial dots on anterior margin (similar to Fig. 16 ) ....................... ................................................................................................................................................. H. esmeralda sp. nov.

5(3). Hind femora yellowish washed with black, heavier on apical ¼, with a longitudinal lighter line ............................. ......................................................................................................................................................... H. lipeo sp. nov.

5’. Hind femora yellowish with black shading restricted to apical ¼ ............................................. H. zunigae sp. nov.

Figures

FIGURES 25–36. Askola. Figs 25–27, male fore wing: 25, Askola emmerichi sp.nov.; 26, Askola paprockii sp. nov.; 27, Askola cipoensis sp. nov. Figs 28–30, Askola emmerichi sp.nov.: 28, genitalia, ventral view; 29, genitalia, lateral view; 30, penes, detail. Figs 31–33, Askola paprockii sp. nov.: 31, genitalia, ventral view; 32, genitalia, lateral view; 33, penes, detail. Figs 34–36, Askola cipoensis sp. nov.: 34, genitalia, ventral view; 35, genitalia, lateral view; 36, penes, detail.

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 7–12. Askola. Figs 7–9, Askola cipoensis sp. nov., male imago. 7, general aspect, lateral view; 8, head, dorsal view; 9, head, lateral view. Figs 10–12, A. froehlichi, male imago. 10, general aspect, lateral view; 11, head, dorsal view; 12, head, lateral 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.

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 13–18. Hagenulopsis. Figs 13–15, H. zunigae sp. nov. 13, male imago, general aspect, lateral view; 14, head, dorsal view; 15, head, lateral view. Figs 16–18, H. esmeralda sp. nov. 16, male imago, general aspect, lateral view; 17, head, dorsal view; 18, head, lateral view.