Distribution of C. angulatus in the main Hawaiian Islands.  This species is also found in the Northwest Hawaiian Islands (Laysan, Lisianski, Midway, Nihoa).

 
  Part of: O'Grady P, Pak N (2016) Studies in Hawaiian Diptera III: New Distributional Records for Canacidae and a New Endemic Species of Procanace. Biodiversity Data Journal 4: e5611. https://doi.org/10.3897/BDJ.4.e5611