Amoeboid protists are extremely abundant and diverse in natural systems where they often play outstanding ecological roles. They can be found in almost all major eukaryotic divisions, and genomic approaches are bringing major changes in our perception of their deep evolutionary relationships. At fine taxonomic levels, the generalization of barcoding is revealing a considerable and unsuspected specific diversity that can be appreciated with careful morphometric analyses based on light and electron microscopic observations. We provide examples on the difficulties and advances in amoeboid protists systematics in a selection of groups that were presented at the VIIIth ECOP/ISOP meeting in Rome, 2019. We conclude that, in all studied groups, important taxonomical rearrangements will certainly take place in the next few years, and systematics must be adapted to incorporate these changes. Notably, nomenclature should be flexible enough to integrate many new high level taxa, and a unified policy must be adopted to species description and to the establishment of types.

变形虫的原生生物在自然系统中极为丰富和多样，它们在生态系统中通常扮演着重要的角色。它们几乎可以在所有主要的真核生物分支中找到，而基因组方法正在使我们对其深层进化关系的认识发生重大变化。在精细的分类学水平上，条形码的普遍化揭示了相当大且未曾怀疑的特定多样性，可以通过基于光和电子显微镜观察的仔细的形态计量分析来欣赏。我们提供了一些实例，介绍了在2019年罗马第八届ECOP / ISOP会议上介绍的一些群体中，变形虫原生物系统学的困难和进展。我们得出结论，在所有研究的群体中，必定会发生重要的分类学重排。接下来的几年 并且必须使系统学适应这些变化。值得注意的是，术语应具有足够的灵活性以集成许多新的高级分类单元，并且必须对物种描述和类型建立采取统一的策略。