Review of selected species of Campsurus Eaton 1868 (Ephemeroptera: Polymitarcyidae), with description of eleven new species and a key to male imagos of the genus Author Molineri, Carlos Author Salles, Frederico F. text Zootaxa 2017 4300 3 301 354 journal article 32564 10.11646/zootaxa.4300.3.1 e96ae80b-2946-4418-8940-07dd60d7728e 1175-5326 838438 554D8B46-D396-42FA-9604-6DA9DFA3EFE7 Campsurus janae sp. nov. ( Figs. 75–76 , 170 ) Type material. Holotype ♂ i from COLOMBIA , Amazonas , Leticia , caño km 11 hacia Tarapacá , (aprox. S 4° 7' / W 69° 57' ), 93 m , 28.i.1999 , light trap 18–20 hs, MC Zúñiga , E Domínguez & C Molineri cols. (MUSENUV). Paratypes : 3 ♂ si (pharate imago) from BRAZIL , Amazonas , Manaus , Reserva Ducke , Igarapé afluente do Acará , S 02° 57'07" / W 59° 57'28" , pennsylvania light trap , 17.v.2008 , N Hamada col. ( CZNC ). Male imago. Length (mm [subimago measurements in brackets]): body, 7.0 [7.0–7.6]; fore wing, 6.5 [6.6]; hind wing, 2.8 [2.9–3.0]; fore leg, 4.0; cerci, 17.0 [broken at apex]. General coloration yellowish white, completely shaded with gray ( Fig. 170 ). Head completely shaded with black dorsally. Antenna yellowish, shaded with gray. Thorax ( Fig. 170 ). Pronotum yellowish, shaded completely with black except on median zones of anterior and posterior portions, medial line blackish; prosternum and propleura yellowish, shaded with gray. Mesonotum yellowish, shaded with gray on medial line, parapsidal sutures and between PSP ; pleura and sterna yellowish with grayish mark anterior to wing insertion; sutures above coxa grayish; sternum shaded completely gray except median zone of furcasternal plate. Metanotum yellowish, shaded slightly with gray medially, metasternum shaded more widely. Legs. All legs whitish yellow, completely shaded gray. Wings. Membrane and veins yellowish translucent, veins shaded gray. Abdomen ( Fig. 170 ) yellowish white, shaded with gray almost completely, medial line blackish, with submedian black spot on each side of terga III–IX; terga VIII–X shaded gray more markedly. Abdominal sterna whitish, shaded with gray completely, darker on gill sclerites, submedian spot at each side of sterna I–VIII. Genitalia ( Figs. 7 5–76 ): yellowish white except pedestal orangeish; sternum IX with truncated hind margin ( Fig. 75 ), medial line, fore and hind margins blackish, fore margin with submedian anterior comma-shaped spot at each side of medial line; pedestal ( Fig. 75 ) of each side almost touching basally, strongly elongated, parastylus short, very broad and rounded apically with inner corner strongly projected; forceps translucent white; base of main lobe of penes ( Fig. 76 ) strongly expanded laterodorsally, ear-like, penes narrowing abruptly on apical half, main lobe of penes apically pointed and curved ventrally; secondary membranous lobe translucent, relatively short and cylindrical. Caudal filaments translucent whitish yellowish. Etymology. This species is dedicated with much pleasure to Janice Peters who continuously encourages and helps us with the study of Polymitarcyidae , especially Campsurus . Distribution ( Fig. 179 ). Colombia and Brazil ( Amazonas ). Diagnosis. Campsurus janae sp. nov. is known from male adults only. It can be distinguished from other species of Campsurus by: 1) posterior margin of male abdominal sternum IX truncated ( Figs. 75 ); 2) pedestal almost touching each other medially, strongly elongated, parastylus short, broad and rounded apically, inner corner strongly projected ( Fig. 75 ); 3) base of main lobe of penes strongly expanded laterodorsally ( Fig. 76 ), penes narrowing abruptly on apical half, main lobe of penes apically pointed and curved ventrally; secondary membranous lobe relatively short and cylindrical; 4) small size (length of male fore wings 6.5 mm ). Discussion. Campsurus janae sp. nov. is similar to C. pereirae sp. nov. , but the extremely large and elongated pedestal of C. janae sp. nov. easily differentiates it. Campsurus janae sp. nov. is described as a pharate male imago (still inside the subimaginal cuticle), but the characteristic genitalia are sclerotized and in their final configuration.