Selected male specimens of representatives of the Nothobranchius ugandensis species group (*denotes populations from which karyotype data was determined) A N. nubaensis Wadi Al Ghallah SD 10-5, southern Sudan B N. nubaensis Fugnido EHKS 09-01*, western Ethiopia C N. albertinensis Olobodagi UG 99-23, northwestern Uganda D N. ugandensis Busesa UG 99-5 (red phenotype), southeastern Uganda E N. ugandensis Busesa UG 99-5 (blue/yellow phenotype), southeastern Uganda F N. ugandensis Namasagali UG 99-3* (red phenotype with submarginal band in caudal fin), south-central Uganda G N. derhami Ahero KEN 19-16*, western Kenya H N. attenboroughi Nata TAN 93-3, north-central Tanzania I N. venustus Chato TZN 19-5*, north-central Tanzania J N. moameensis Mabuki TZN 19-8*, north-central Tanzania K N. hoermanni Bumburi TZHK 2018-03*, central Tanzania L N. torgashevi TNT 2014-04*, south-central Tanzania M N. streltsovi TSTS 10-05, south-central Tanzania N N. itigiensis Itigi TAN 03-8*, central Tanzania O N. kardashevi Mpanda K 2011-25*, southwestern Tanzania. The fishes on the photos have a size of 45–50 mm SL (standard length). Photographs by Béla Nagy (A, B, G, I, J–L, O) and Brian Watters (C–F, H, M, N).