Miroculis (M.) eldorado (Figs. 1 –10)

Diagnoses. Male imago: 1) forewing with membrane hyaline, distal area of costal and subcostal region lightly darker; 2) eleven facets in the longest row of upper portion of compound eye; 3) femora of all legs with an apical blackish band, hind femur with a medial blackish band; 4) penes long and thin, wider basally, length equal to segments I+II of forceps. Nymph: 1) anterolateral margin of labrum slightly flattened with lateral margins angular (Fig. 4); 2) Segment II of labial palp 1.15 x length of Segment I (Fig. 8); 3) Segment II of maxillary palp 1.34 x the length of Segment I (Fig. 7); 4) posterolateral spines on terga VIII–IX larger (Fig. 3); 5) gills with lateral lobes well-developed and trachea unbranched (Fig. 10).

Mature nymph. Lengths. Body: 5.0– 5.5 mm. Foreleg: 2.88 mm; middle leg: 2.72 mm; hind leg: 3.08 (all coxa and trochanter not included). Caudal filament: broken.

Coloration (Figs. 1–3). Head: brown with pale area surrounding ocelli and eyes; lateral edges of genae darker; antenna with scape and flagellum pale yellow and pedicel darker. Eye: upper portion of turbinate eye reddish brown and lower portion black; ocelli apically purplish and basally blackish. Mouthparts: mandibles dark brown; maxillae pale yellow; hypopharynx pale yellow; labium light brown; submentum light brown.

Thorax: pro-, meso-, and metanotum brown with medial pale yellow line; antelateroparapsidal sutures and sublateroscutum blackish (Fig. 1). Thoracic sterna whitish, except metasternum with anterior margin dark brown.

Legs: pale yellow; femora with sub-apical blackish bands (Figs. 1, 2); ventral margin of tibia with blackish mark and subapical blackish band.

Abdomen: abdominal terga I–X brown with a pair of medial macula and lateral blackish marks; tergum X darker; sterna pale yellow (Fig. 1). Gills gray and trachea blackish gray (Fig. 10). Caudal filaments pale yellow; basal portion of joint darker.

Morphology, Head: clypeus concave anteriorly; labrum with anterolateral margin slightly flattened and lateral margins angular (Fig. 4); outer margin of mandibles curved (Figs. 5, 6); maxilla as in Fig. 7; inner margin of apex on SII of labial palp not acute (Fig. 8). Width of Labium palp Segment I 0.58 x length; Segment III length of labial palp 0.53 x length of Segment II and 0.61 x length of Segment I; Segment II length 1.15 x length of Segment I. Maxilla: Segment III of maxillary palp 0.44 x length of Segment II and 0.59 x length of Segment I; Segment II 1.34 x length of Segment I.

Legs: Foreleg: width of femur 0.31 x length; width of tarsal claw 0.33 x length; midleg: width of femur 0.32 x length; hind leg: width of femur 0.31 x length. subapical denticle of tarsal claw of foreleg larger than the remaining denticles (Fig. 9).

Abdomen: posterolateral spines on segments IV–IX (Fig. 3) (larger on segments VIII–IX). Gill: Length of medial filament 0.98 x length of body of gill; trachea unbranched, lateral lobes present, well-developed; inner lobe of dorsal lamella 3.7 x length of outer margin (Fig. 10).

Life cycle association. Male imago reared from nymph.

Distribution. Roraima State, Brazil.

Material examined. One nymph, Brazil, Roraima, Amajari, Serra do Tepequém, Igarapé Geladeira, 03°47'N / 61°45'W, 01.xi.2014 , Boldrini, R. and Barroso, P.C.S. col. Two nymphs, Brazil, Roraima, Amajari, Serra do Tepequém, Igarapé do Barata, 03°47'07.7"N / 61°45'02.6"W, 16.ii.2016 , Boldrini, R. col. One male imago (reared, exuviae mounted on slides), Brazil, Roraima, Amajari, Serra do Tepequém, Igarapé do Barata, 03°47'07.7"N / 61°45'02.6"W, 01.xii.2017 , Boldrini, R. and Lima, L.R.C. col.

Comments. The nymph of Miroculis (M.) eldorado, shares some similar characters with Miroculis (Atroari) amazonicus Savage & Peters and M. (Miroculis) fittkaui Savage & Peters, especially by having gills with grayish coloration and trachea unbranched, posterolateral lobes well-developed, and labrum with lateral margins angular (Fig. 4). However, M. (M.) eldorado can be differentiated from both by the posterolateral abdominal spines: on segments IV–IX in M. (M.) eldorado, II–IX in Miroculis (Atroari) amazonicus and M. (M.) fittkaui .