H. callosoma female (paralectotype of H. albosignatus Ringdahl)  
  Part of: Kahanp√§√§ J (2013) A second update to the checklist of Finnish long-legged flies (Diptera: Dolichopodidae), with a re-evaluation of the status of Hydrophorus callosoma Frey, 1915. Biodiversity Data Journal 1: e976. https://doi.org/10.3897/BDJ.1.e976