Producing two generations per year. See also: Univoltine, Semivoltine, Multivoltine.

A raised ridge or keel on the body, common in larval morphology. See also: Sclerite, Spine.

Relating to the posterior end of the body. Opposite: Cranial. See also: Posterior, Abdomen.

Three leaf-like appendages at the end of the abdomen in damselfly larvae. Function as external gills and stabilisers during swimming. See also: Larva, Setation.

A facial sclerite between the frons and labrum. Useful in identification. See also: Frons, Labrum, Sclerite.

Belonging to the same species.

The leading edge vein of the wing, providing rigidity and aerodynamic stability. See also: Anterior, Venation, Node.

The proximal leg segment articulating with the thorax. See also: Trochanter, Femur, Proximal.

Toward the head. Opposite: Caudal. See also: Anterior, Posterior.

Active at twilight.