Tiunova T.M.
Far Eastern Entomologist 2026; (552): 8-20
The larvae, male and female imagines, and eggs of mayfly Cinygmula latifrons Tshernova et Belov, are described and illustrated based on reared specimens from the Russian Far East. The larvae and eggs are described and illustrated for the first time. By the shape of its gills I the larvae of C. latifrons is similar to the ones of C. hirasana Imanishi, C. kurenzovi (Bajkova) and C. levanidovi Tshernova et Belov. However, C. hirasana and C. levanidovi larvae have gill filaments on the gill I, and C. kurenzovi do not have thin processes at the ends of IV-VI gills characteristic of C. latifrons. The male imago of C. latifrons differs from all known Far Eastern Cinygmula species except C. hirasana in its widely separated eyes. C. latifrons differs from C. hirasana in the pear-shaped shape of the eyes and the structure of the lateral spine of the penis lobes
