Idiocnemis dagnyae

Idiocnemis dagnyae is a medium-sized Papuan damselfly characterized by a generally light to dark brown coloration with diffuse pink, violet, or brown-purple markings on the thorax and abdomen. The head is distinctive by its yellow-white frons and black-ringed ocelli, which in some specimens expand into a subrectangular black marking typical of the bidentata-group. Thorax predominantly light brown with a broad black middorsal carinal stripe of variable width; synthoracic coloration highly variable, ranging from almost uniformly light brown to strongly suffused with violet or pink tones. Antehumeral stripes are weakly developed or inconspicuous, especially in females. Wings hyaline with a medium-brown rhombic pterostigma and relatively dense venation. The abdomen is slender with conspicuous pink dorsal markings on segments 1–6 and again on segments 8–9, while segment 7 is uniformly brown. Male anal appendages yellow, with superior appendages shaped similarly to those of Idiocnemis mertoni, but differing in the genital ligula, whose lateral hooks are more rounded than in I. bidentata. Inferior appendages about two-thirds the length of the superiors. Females distinguished by a subtriangular posterior pronotal lobe and reduced abdominal markings. Idiocnemis dagnyae differs from related species by the combination of variable violet-pink thoracic coloration, weak antehumeral stripes, yellow anal appendages, rounded ligula hooks, and pink dorsal abdominal markings extending onto segments 8–9. The species inhabits lowland areas of the Bird’s Head Peninsula, Misool Island, and southern New Guinea, typically below 100 m elevation.