Hagenulopsis minuta Spieth, 1943

Hagenulopsis minuta Spieth View in CoL

( Figs. 4–6 View FIGURES 4–6 )

Hagenulopsis minutus Spieth, 1943: 10 ; Traver, 1946: 427.

Hagenulopsis minuta View in CoL ; Peters & Domínguez, 2001: 354; Domínguez, Molineri & Mariano, 2009: 43 View Cited Treatment .

Material. Venezuela, Edo Bolívar, Aponwao river , 5º 51’ 02’’N – 61º 27’ 52’’ W, 1340 m GoogleMaps , 20/XI/2005, 12 male and 17 female imagos. Small stream near Kavanayén locality, 5º 38’ 08’’N – 61º 40’ 47’’W, 1355 m GoogleMaps , 19/ III /2005 GoogleMaps , 1 nymph. Kamoirán river   GoogleMaps , 5º37’12’’N – 61º21’47’’W, 1313 m, 23/XI/2005, 1 male imago. Idem, except date 29/ VI / 2007 GoogleMaps , 9 nymphs. Mareman-Parú river   GoogleMaps , 5º 44’ 49’’N – 61º 24’ 06’’W, 1308 m, 23/XI/2005, 1 nymph. Idem except date 19/ III /2006, 2 nymphs. Idem, except date 26/ VI /2007, 6 male and 11 female subimagos. Idem, except date 28/ VI /2007, 6 male and 8 female imagos (Malaisse trap). Kaui stream, 5º 28’ 34’’N – 61º 16’ 20’’W, 1196 m GoogleMaps , 20/ III / 2006 GoogleMaps , 3 nymphs. Pacheco   GoogleMaps stream, 5º 10’ 29’’N – 61º 29’ 51’’W, 1144 m, 21/ III /2006 GoogleMaps , 1 nymph. Soroape river   GoogleMaps , 5º 06’ 29’’N – 61º 34’ 40’’W, 935 m, 25/XI/2005, 1 nymph. Small stream in the road to the Paují locality, 4º 36’ 45’’N – 61º 05’ 25’’W, 942 m GoogleMaps , 17/ III /2006 GoogleMaps , 1 nymph. Stream close to the Paují   GoogleMaps locality, 4º 35’ 11’’N – 61º 30’ 53’’W, 936 m, 17/ III /2006 GoogleMaps , 1 nymph. Tarotá   GoogleMaps stream, 5º49’15’’N – 61º25’04’’W, 1324 m, 27/ VI /2007 GoogleMaps , 5 male and 11 female imagos. Parupa river   GoogleMaps , 5º40’49’’N – 61º32’39’’W, 1281 m, 19/ III /2006 , 13 nymphs. Collectors : EG, MEG and AMO. The specimens were deposited at the MLBV ( Venezuela) and IBN ( Argentina).

Discussion. This species was reviewed and re-described by Peters & Domínguez in 2001. It is a very characteristic species, due to the presence of a well developed eye bridge ( Figs. 4–5 View FIGURES 4–6 ) and its small size. The females of this genus also have an egg-guide ( Fig. 6 View FIGURES 4–6 ).

Distribution. Brazil, Guyana, Surinam, Venezuela and north to Honduras.

Ecology. Imagos were collected along the stream margins, at night, during the rainy season ( November 2005 and June 2007); whereas nymphs were collected during rainy and dry seasons ( November 2005, March 2006 and June 2007). The rivers and streams flow across the altitude gradient of the Gran Sabana region ( 936 m – 1355 m), and showed different riparian vegetation (varying from streams partially shaded to rivers not shaded at all). They ranged from small streams ( 2 m wide) to large rivers ( 50 m wide), with variable water depths (4.0– 40 cm) and acidic waters (pH = 5). The bottoms of these waterbodies also were heterogeneous: rock-gravel-bottom, gravelsandy bottom, and bed-rock-bottom.