About Caconeura ramburi (Fraser, 1922)
Caconeura ramburi is a medium-sized damselfly. Individuals have black-capped blue eyes. The thorax is black on the dorsum and azure blue on the sides; each side has a very narrow azure blue antehumeral stripe and a narrow black stripe on the postero-lateral suture. The wings are transparent, with black, diamond-shaped pterostigma. The abdomen is black, with azure blue stripes on segments 1 and 2. Segments 3 through 7 have broad azure blue basal rings. Segments 8 through 10 are azure blue on the dorsum, with black basal annules; the lateral side of segment 10 is black. Females are similar in appearance to males, but their markings are more greenish-blue or even yellow, except in very old specimens. This species is larger and more slender than Caconeura gomphoides, and breeds at lower altitudes than Caconeura gomphoides; it can be distinguished from Caconeura gomphoides by its broad blue basal annules. It can be distinguished from Caconeura risi by its larger size, differently shaped pterostigma, lack of a ventral spine on the base of the superior appendages, and entirely black underside of the head. Caconeura ramburi breeds in forest streams, and is commonly found perched on riparian vegetation along shaded streams.
