Аннотация:Sattler's dynamic morphology is erroneously regarded as an alternative to typological (= essentialistic) morphology. When strictly applying its principles which are inconsistent, homologisation of any structure becomes impossible. This undermines the very nature of morphology which is intended for revealing correspondences between structures of different living beings. When we consider the semi-quantitative estimate of structural characters to be opposite to the homologisation of structures, Sattler's principles are generally not applicable because such an estimate needs regular appealing to structural standards (= merons) that are only established in typological morphology. Dynamic morphology is a part of typological morphology which aims to tackle the problem of revealing and precise scopes of application of merons.