Austroaeschna sigma is a species of large dragonfly in the family Aeshnidae, known as the sigma darner. It inhabits the upper reaches of small mountain streams in New South Wales and south-eastern Queensland, Australia.
Austroaeschna sigma is a very dark dragonfly with pale markings. It appears similar to the multi-spotted darner, Austroaeschna multipunctata, which inhabits mountain streams in southern New South Wales and Victoria.
Etymology The genus name Austroaeschna combines the prefix austro- (from Latin auster, meaning “south wind”, hence “southern”) with Aeshna, a genus of dragonflies.
The species name sigma refers to the Greek letter sigma, corresponding to the English letter "S", and to the shape of a mark on the thorax.
Gallery
See also List of dragonflies of Australia
References