Posted by atylotus on 07-12-2009 10:00
#3
According to Saether (in Nillson, 1997) there are 3 species of Chaoborus in Denmark: C. crystallinus, C. flavicans and C. obscuripes. When I look at the labral blade (the hyaline toothes lamellae at the ventral side of the head just posterior of the antenna) it must be C. obscuripes. In C. crystallinus and C. flavicans this labral blade is protruded into a long threadlike extension.