A new mayfly species of Choroterpes (Choroterpes) Eaton, 1881 (Ephemeroptera Leptophlebiidae) from southern Western Ghats, India Author Muthukatturaja, Marimuthu Department of Zoology, Thiagarajar College, Madurai- 625009, Tamil Nadu, India. Author Balasubramanian, Chellaiah Department of Zoology, Thiagarajar College, Madurai- 625009, Tamil Nadu, India. text Zootaxa 2022 2022-04-19 5128 1 142 150 journal article 55851 10.11646/zootaxa.5128.1.9 1e693690-d152-4c81-b391-44399a71d6dc 1175-5326 6479674 F83029DC-D657-4D18-81B9-C1360EAA23C5 Nymphal key to the known species of subgenus Choroterpes in India 1. Gill I single ……..................................................................................... 2 - Gill I double...................................................................... Choroterpes ( C. ) petersi 2. Gill I slender.......................................................................................... 3 - Gill I basal half broader and tapered to apex................................. Choroterpes ( C. ) kumaradhara sp. nov. 3. Upper and lower lamellae of gills 2–7 broad............................................ Choroterpes ( C. ) kaegies - Upper and lower lamellae of gills 2–7 not broad................................... .. Choroterpes ( C. ) andamanensis