Leptophlebiidae Banks, 1900 (Insecta, Ephemeroptera) from Maranhão state, Brazil Author Nascimento, Stênio Raniery de Sousa Author Lima, Lucas Ramos Costa Author de Azevêdo, Carlos Augusto Silva text Check List 2020 2020-05-19 16 3 579 591 http://dx.doi.org/10.15560/16.3.579 journal article 10.15560/16.3.579 1809-127X Simothraulopsis sinuosus Lima , 2018 Figures 22 , 41 Simothraulopsis sinuosus Lima 2018: 254 . Diagnosis. Male imago: 1) hind wing with costal projection forming a right angle, located approximately ½ distance from base to apex of wing; 2) abdominal terga II–VII with medio-basal, translucent, yellow angles ( Fig. 22 ); 3) penis projection spine-like, sinuous, mediumsized (approximately ½ of the total length of penis lobes), slightly laterally directed ( Fig. 41 ); 4) penis lobes fused on basal half, with a shallow concavity in the junction of the lobes ( Fig. 41 ). Adapted from Lima (2018) . Geographical distribution. Brazil : states of Maranhão * and Piauí . Material examined. BRAZIL • 1 imago ♂ ; Maranhão state , Caxias municipality, Pé da Serra , Rio Itapecuru ; 05°07′28.5″S , 043°33′02.3″W ; 68 m a.s.l. ; 20 Dec. 2017 ; S. R . S. Nascimento , J.I.S. Jesus , D.C. Sousa and M.A.G. Almeida leg; light trap ; LEAq .