Detailed comparison of two close Chinese species, Teloganopsis punctisetae (Matsumura, 1931) and T. jinghongensis (Xu, You and Hsu, 1984) (Ephemeroptera: Ephemerellidae)

Historically and currently, there have been identification confusions between two closely related species, Teloganopsis punctisetae (= E. changbaishanensis Su and You, 1988, syn. nov.) and T. jinghongensis. This study provides clear digital photographs of numerous external structures of these two species and compares them in detail. Morphologically, the nymphs differ in their colour patterns and leg shapes, while the adults have different hindwings, femora, and penial projections. This comparison not only shows the differences in characteristics between these two similar species but also clarifies the identification of the genus Teloganopsis Ulmer, 1939.