Chalcostephia is a monotypic genus of dragonflies in the family Libellulidae containing the single species Chalcostephia flavifrons. It is known by the common names yellowface and inspector. It is native to central Africa, where it has a widespread distribution. This dragonfly lives in swampy habitats. It is affected by the drainage and reclamation of swamps for agriculture, but it is not considered to be threatened.
Chalcostephia is a monotypic genus of dragonflies in the family Libellulidae containing the single species Chalcostephia flavifrons. It is known by the common names yellowface and inspector. It is native to central Africa, where it has a widespread distribution. This dragonfly lives in swampy habitats. It is affected by the drainage and reclamation of swamps for agriculture, but it is not considered to be threatened.
==Description== Chalcostephia flavifrons is a fairly small species of dragonfly, with a hind-wing length of . The mature adult male is a bluish-grey colour and pruinose (covered with a dusting of wax particles on top of the cuticle). The adult female and the newly emerged male are dark with bold yellow banding. Both males and females can be distinguished from other similar species by their yellow face contrasting with the flattened, metallic green frons (front of the head). The membranous, veined wings are transparent except for the pterostigmata, a small group of thickened cells at the leading edge of the wing-tips, which have pale centres and dark edges.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).