Müller's work was focused on beetles, especially carabid beetles, and he described 757 new insect taxa, including many new genera. He also studied other animal groups, such as pseudoscorpions, crustaceans, reptiles and birds of prey. Selected works: References 1880 births 1964 deaths Croatian zoologists 20th-century Italian zoologists Croatian entomologists Italian entomologists Directors of museums in Italy University of Graz alumni People from Zadar 20th-century Croatian scientists Zoologists from the Austro-Hungarian Empire