One of world leading experts in palaeoentomology. His scientific interests are centered on the palaeontology, phylogeny and taxonomy of the hymenopteran insects and of the insects in general. He has also studied broader biological problems, such as evolutionary theory and the principles of phylogenetics, taxonomy, and nomenclature. He published over 220 articles and books. In biology, phylogenetics (Greek: phylon = tribe, race and genetikos = relative to birth, from genesis = birth) is the study of evolutionary relatedness among various groups of organisms (e. ... Taxonomy (from Greek verb tassein = to classify and nomos = law, science, cf economy) may refer to: the science of classifying living things (see alpha taxonomy) a classification Initially, taxonomy was only the science of classifying living organisms, but later the word was applied in a wider sense, and may also... Suborders Apocrita Symphyta Many families, see article Hymenoptera is one of the larger orders of Insects, comprising the sawflies, wasps, bees, and ants. ... Nomenclature is a system of naming and categorizing objects in a given category. ...