130 species of Hygrobiidae, Noteridae and Dytiscidae were indexed in Belgium. Some of them were no more observed since 1950, others are potentially observable in Belgium because they were recorded in the adjacent zones, for others the observations are doubtful.

This catalog is based on 15.040 observations (or occurrences) realized between 1839 and 2000. The sources are : collections, literature and observations.

Four catalogs were published for Belgium : Mathieu C. (1857), Preudhomme de Borre A. (1886), Van Dorsselaer R. (1957) and Dopagne C. (1995).

You will find in this site :

• The list of species present in Belgium ("checklist"). The observed species, the species no more recorded since 1950 or the doubtful ones are differentiated. For most of them, a distribution map can be displayed.
  
• The status of each of the species : enigmatic, extinct, accidental, in danger, vulnerable, rare, common, very common, undetermined.
  
• Few histograms ("statistics") on : the phenology, the evolution of occurrences in Belgium, etc.  ...
  
• A list of references regarding mainly Belgium.
  
• Links with interesting Internet sites.

If you have remarks, supplementary informations (new occurrences, references, etc. ...), please send me an e mail.