Description of the nymph of Miroculis (Miroculis) eldorado Gama-Neto & Hamada, 2014 (Leptophlebiidae: Ephemeroptera) from Roraima, northern Brazil Author Boldrini, Rafael Author Lima, Lucas Ramos Costa Author Ottoni-Boldrini, Bianca Maira De Paiva text Zootaxa 2018 2018-08-14 4459 1 197 200 journal article 29037 10.11646/zootaxa.4459.1.12 f475bef2-1873-4aaa-947a-a21397d0a9ed 1175-5326 1458332 E9E6BDD9-274C-4BCD-B678-76D9AB261456 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 .