First Larval Description of the Genus Risiophlebia Cowley, 1934 (odonata: Libellulidae), Based on R. Dohrni (krüger, 1902), with Notes on Taxonomic Placement and Comparison with Related Southeast Asian Libellulid Larvae

The final instar larva of Risiophlebia dohrni (Kr & uuml;ger, 1902) (Odonata: Libellulidae) is described for the first time based on specimens collected from lowland freshwater swamp forests in Singapore. The larva is characterised by elongate antennae exceeding head length, small compound eyes, and well-developed middorsal and posterolateral abdominal spines. Comparative examination with related Southeast Asian libellulid larvae indicates that Risiophlebia possesses a distinctive combination of characters not observed in other described genera. These findings provide useful diagnostic features for larval identification and contribute to improving comparative larval taxonomy of Southeast Asian Libellulidae. The species inhabits shallow stagnant pools in swamp forest habitats, highlighting the importance of conserving these localised wetland environments.