Leptophlebiidae (Larva)

Selvakumar, C., Sivaruban, T., Subramanian, K. A. & Sivaramakrishnan, K. G., 2016, A new genus and species of Atalophlebiinae (Insecta: Ephemeroptera: Leptophlebiidae) from Palni hills of the southern Western Ghats, India, Zootaxa 4208 (4), pp. 381-391 : 383-384

Key to known genera of south Indian Leptophlebiidae (Larva)

1. Abdominal tergites extending round to ventral surface of the abdomen on segments 3–7, slender gills arise ventrally.................................................................................................... Isca (Isca)

- Abdominal tergites extend to lateral margins of the body; gills arise laterally.......................................2

2. Gills present on abdominal segments 1–6.......................................................... Notophlebia

- Gills present on abdominal segments 1–7...................................................................3

3. Middle abdominal gills (3–5) with a fringed margin or with filamentous processes..................................4

- Middle abdominal gills not as above.......................................................................5

4. Middle abdominal gills plate like, broadly oval, entire margins fringed with filamentous processes............... Thraulus

- Middle abdominal gills plate- like, irregular in shape, unevenly fringed with rather broad filamentous processes.... Petersula

5. Middle abdominal gills leaf-like; apex of gills 1–7 with three filamentous processes, the median process longer than the lateral processes.................................................................................... Nathanella

- Middle abdominal gills plate like; apex of gills not as above....................................................6

6. Lamellae of gills 2–7 trifurcate...........................................................................7

- Lamellae of gills 2–7 not trifurcate........................................................................ 9

7. Gills 1–7 monolamellate....................................................... Choroterpes (Monochoroterpes)

- Gills 1–7 bilamellate...................................................................................8

8. Middle abdominal gills terminated in 3 slender, subequal processes........................ .. Choroterpes (Euthraulus)

- Middle abdominal gills terminated in 3 processes, with median projection longer than laterals.... Choroterpes (Choroterpes)

9. Denticles on claws progressively larger apically; apical denticle much larger............................. Edmundsula

- Denticles on claws progressively larger apically; apical denticle not much larger...................................10

10. Gills 1–7 similar, dorsal and ventral portions of lamellae slender, tracheae branched............................ Indialis

- Gills 1–7 dissimilar; dorsal and ventral portions of lamellae of gill 1 slender and lanceolate with branched trachea, dorsal and ventral portions of lamellae of gills 2–7 wider and lanceolate and tapering near apex................ Klugephlebia gen. n.