Pseudagrion pruinosum fraseri (Ferruginous-faced sprite)

Habitat: larvae associated with submerged vegetation in slow flowing streams

General appearance: body large sized, proably up to about 22mm long; head pentagonal with postocular lobes rounded and large eyes; three paddle-shaped caudal gills with a nodus: basal part with stout spines on edges and distal part at a tilt with fine setae

A quote "When compared with the other known Pseudagrion larvae, P. pruinosum is distinguished by three setae on the labial palp, five teeth on the truncate, denticulate lobe on the distal marginal end of the labial palp, one premental seta and a row of three minute setae on each side of the midline, as well as shape and tracheation of caudal gills" from Saetung T. & Boonsoong B. (2016) Description of the final instar larva of Pseudagrion pruinosum (Burmeister, 1839) (Odonata: Coenagrionidae) from Thailand. Zootaxa

The presence of transverse nodal line is one of the key features to distinguish from other Pseudagrion species.