Mededelingen Herontdekking van een populatie van de Gewone bronlibel bij Venlo (Cordulegaster boltonii)

Kalkman, V.J. & B. Koese, 2006. Rediscovery of a population of the Common goldenring (Cordulegaster boltonii) near Venlo. Brachytron 9 (1&2): 58-60. On March 27 2006 a larva of Cordulegaster boltonii was caught at the brook Aalsbeek (also called Molenbeek), just east of Belfeld (AC: 207-368). This is the fifth Dutch locality were C. boltonii is known to reproduce. The species was already known from this locality from records made by Maus Lieftinck in 1921, 1922, 1923, 1924, 1926 and 1951 and from a record by Dirk Geijskes in 1967. It is likely that the species has been present ever since but has been overlooked.