Lestidae, Calvert, 1901

Chandran, Ayikkara Vivek, Jose, Subin Kaniyamattathil & Dawn, Prosenjit, 2023, Description of the Last Instar Larva of Platylestes platystylus (Rambur, 1842) from Kerala, India (Odonata: Lestidae), Zootaxa 5380 (6), pp. 587-594 : 591

Larval key to the genera of family Lestidae from India

- Outer lobe of labial palp forklike with three similar inwardly directed spines...................................... 1

- Outer lobe of labial palp with unequal or irregular shaped spines................................................ 2

1. Smaller larva, total length nearly 25–26 mm ......................................................... Indolestes

- Comparatively longer larva, total length 29–30 mm .......................................................... 3

2. Caudal appendages/lamellae long feather like, labium long racket shaped with a somewhat triangular prementum..... Lestes

- Caudal lamellae slightly shorter, labium relatively short and gradually widens toward tip attaining a ‘V’ shape rather than racket shape....................................................................................... Sympecma

3. Anterior margin of median lobe of prementum straight, slightly projected medially........................... Orolestes

- Anterior margin of median lobe of prementum depressed forming a V shape with a deep median cleft in the middle Platylestes