FIGURES 51–59 in 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

FIGURES 51–59. male imagos. Campsurus cuyuniensis: 51, paratype forceps (CUIC2434); 52, same but from another paratype; 53, male genitalia from French Guiana specimen (FAMU), v.v. Campsurus nessimiani sp. nov.: 54, genitalia, v.v.; 55, same, l.v. Campsurus dasilvai sp. nov.: 56, genitalia, v.v.; 57, same, l.v.; 58, genitalia, v.v. (SEM), with detail of microlepides on sternum IX; 59, details of penes, v.v. (SEM).