Guyana
1989 PDF First expedition to collect Rivulus in the former British Guyana together with Melville van Lange -1989.php (Click to choose) In Dutch only.  
1991  
1992 Data records on Third expedition to collect Rivulus in Guyana with my wife Marjan with collecting data of Rivulus torrenticola and other Rivulus species on the Guyana plateau-1992.php  
1994  
1997  
2006  
2010  

Surinam
2000  
2003  
2010  
2013  

Venezuela
2004  
2005  
2009  
2010  
2011  
2011  
2012  
2012  
2013  
2014  

Colombia
2006  
2008 Expedition of 21 days to find in a second attempt the mysterious "Cyprinodon" martae, Steindachner 1875 in the northern region of Colombia and the terra tipica of many described Rivuline species of which the rediscovery is necessary for a better understanding of their position and of coarse also to discover Rivulid fishes new to science-2008.php (in prep.)  
2009 Third attempt to collect "Cyprinodon" martae and find Rachovia splendens at its terra typica. This time 10 days at the end of June 2009 with Francisco Correa. (in prep.)

 

2014  

Argentina
2008