Hemicordulia koomina is a species of dragonfly in the family Corduliidae,[3] known as the Pilbara emerald.

[4] It has been found in the Pilbara region of Western Australia.

[5] Hemicordulia koomina is a small to medium-sized, black and yellow dragonfly with long legs.

In both males and females the inboard edge of the hindwing is rounded.

[6]