Ephemeroptera from the Venezuelan Guayanas´s Uplands: Families Leptophlebiidae, Euthyplociidae and Oligoneuriidae Author Domínguez, Eduardo Instituto de Biodiversidad Neotropical (IBN), CONICET-Universidad Nacional de Tucumán. Miguel Lillo 205. 4.000 Tucumán, Argentina. E-mail: mayfly @ unt. edu. ar Author Grillet, Maria-Eugenia Laboratorio de Biología de Vectores y Parásitos, Instituto de Zoología y Ecología Tropical, Facultad de Ciencias, Universidad Central de Venezuela, AP 47058, Caracas 1041 - A, Venezuela. E-mail: maria. grillet @ ciens. ucv. ve Author Nieto, Carolina Instituto de Biodiversidad Neotropical (IBN), CONICET-Universidad Nacional de Tucumán. Miguel Lillo 205. 4.000 Tucumán, Argentina. E-mail: mayfly @ unt. edu. ar Author Molineri, Carlos Instituto de Biodiversidad Neotropical (IBN), CONICET-Universidad Nacional de Tucumán. Miguel Lillo 205. 4.000 Tucumán, Argentina. E-mail: mayfly @ unt. edu. ar Author Guerrero, Edmundo Museo del Instituto de Zoología Agrícola Francisco Fernández Yépez, Facultad de Agronomia, Universidad Central de Venezuela, Maracay, AP 4579, Maracay, Venezuela. E-mail: edmundo. guerrero @ miza-ucv. org. ve text Zootaxa 2014 2014-07-04 3827 3 301 317 journal article 5314 10.11646/zootaxa.3827.3.1 54637182-8d50-4ef3-ad88-e3ee10f3d4cd 1175-5326 4920666 8C4821D8-072C-453A-ACF6-6EC539AE96AD Miroculis (Miroculis) marauiae Savage & Peters Miroculis (Miroculis) marauiae Savage & Peters, 1983: 517 . Material. Venezuela , Edo Bolívar , Kavanayén stream, 5º 37’ 27’’N – 61º 44’ 37’’W , 1355 m , 21/XI/2005 , 1 male imago. Kamoirán river , 5º 37’ 12’’N – 61º 21’ 47’’W , 1313 m , 29/VI/2007 , 4 nymphs. Soroape rivers, 5º 06’ 29’’N – 61º 34’40’’W , 935 m . 21/III/2006 , 2 nymphs. Kaku-Parú stream, 4º 54’ 00’’N – 61º 05’ 25’’W , 913 m , 25/XI/ 2005 , 3 nymphs. Idem , except date 29/VI/2007 , 1 nymph. Tarotá stream, 5º 49’ 15’’N – 61º 25’ 04’’W , 1324 m , 18/ III/2006 , 1 nymph. Idem , except date 27/VI/2007 , 4 nymphs, 2 male imagos. Parupa river , 5º 40’ 49’’N – 61º 32’ 39’’W , 1281 m , 19/III/2006 , 9 nymphs. Idem , except date 29/VI/2007 , 3 nymphs. Collectors: EG , MEG and AMO . Specimens were deposited at the MLBV ( Venezuela ) and IBN ( Argentina ). Discussion . Miroculis (Miroculis) marauiae was described originally from Northern Brazil (Amazonas state). The imagos of this species can be characterized by: 1) Upper portion of eyes on narrow, dorsally directed stalks, with 8 to 9 facets in longest row; 2) fore and hind wings without maculae around cross-veins; and 3) length of penes 0.8–1.1 times length of segment I of forceps. In the nymph, the abdominal gills are small and slender, with posterolateral lobes from medium-sized to reduced. In this study imagos and nymphs of this species were collected at elevations from 900 up to 1355 m . Distribution. Brazil and Venezuela ( new country record) . Ecology. Imagos and nymphs were collected in water currents with acidic waters (pH = 5) that ranged from small streams ( 12 m wide) to medium rivers ( 30 m wide). They also varied in their riparian vegetation (from partially shaded to non-shaded) and bottom (from bed-rock bottom to gravel-bottom rivers). Collections corresponded to dry ( March 2006 ) and rainy season ( November 2005 , March 2006 and June 2007 ).