I'm working on beetles of Germany, Central Europe, Europe. There is some knowledge in other invertebrates and even Spiders, Amphibians, Shells.

In the moment I'm much interrested in beetles of genus Dytiscus, Cybister and subfamily Donaciinae (Donacia, Plateumaris, Macroplea etc.) of the world. If you have any of these you would like to send or if you are interrested in exchange (I can offer several of these of Europe), I'm always interrested.