Tenter Astrid M, Barta John R, Beveridge Ian, Duszynski Donald W, Mehlhorn Heinz, Morrison David A, Thompson R C Andrew, Conrad Patricia A
Institut für Parasitologie, Tierärztliche Hochschule Hannover, Bünteweg 17, D-30559, Hannover, Germany.
Int J Parasitol. 2002 May;32(5):595-616. doi: 10.1016/s0020-7519(02)00021-8.
At the joint meeting of the 8th International Coccidiosis Conference and the Annual Scientific Meeting of the Australian Society for Parasitology in Palm Cove, Australia, in July 2001, a Controversial Roundtable was held on 'New classification of coccidia'. The aim of this Roundtable was to stimulate and encourage discussion and debate on current classification schemes for the group of parasitic protozoa known as the eimeriid coccidia. In the past, such classifications have been based only on phenotypic characters such as morphology, ultrastructure, life cycles, and host specificity. However, over the past 10-15 years, molecular phylogenetic studies on taxa of the eimeriid coccidia have revealed that several of the families, subfamilies, and genera that have been erected based on non-molecular characters are paraphyletic. Therefore, this Roundtable was an important forum for initial discussions on how a new and more comprehensive classification of the eimeriid coccidia, which takes into consideration both phenotypic and molecular characters, can be devised. The stimulus came from invited speakers who gave introductions into selected areas of taxonomy and classification. Following these introductions, a more general discussion with the audience addressed potential steps that may be taken in future work. This review is the immediate outcome of the Roundtable. It describes advantages and disadvantages of the use of phenotypic or molecular characters as the base for taxonomic schemes for eimeriid coccidia. It gives specific examples for drawbacks of current classifications based only on phenotypic characters as well as potential pitfalls associated with the use of only molecular phylogenies. It addresses current controversies as well as rules of taxonomy and nomenclature relevant for the eimeriid coccidia. Finally, it recommends the establishment of an international group of scientists to meet on a regular basis, stimulate further discussions, and give direction on how the final goal, i.e. a proposal for a revised, and widely accepted, classification of the eimeriid coccidia, may be achieved.
2001年7月，在澳大利亚棕榈湾举行的第8届国际球虫病大会与澳大利亚寄生虫学会年度科学会议的联席会议上，举办了一场关于“球虫新分类”的争议性圆桌会议。本次圆桌会议的目的是激发并鼓励就被称为艾美耳科球虫的寄生原生动物群体的当前分类方案展开讨论与辩论。过去，此类分类仅基于形态学、超微结构、生命周期和宿主特异性等表型特征。然而，在过去的10至15年里，对艾美耳科球虫类群的分子系统发育研究表明，一些基于非分子特征建立的科、亚科和属是并系群。因此，本次圆桌会议是一个重要的论坛，用于初步讨论如何设计一个新的、更全面的艾美耳科球虫分类，该分类要同时考虑表型和分子特征。激励来自受邀演讲者，他们对分类学和分类的选定领域进行了介绍。在这些介绍之后，与听众进行了更广泛的讨论，涉及未来工作中可能采取的潜在步骤。本综述是圆桌会议的直接成果。它描述了将表型或分子特征用作艾美耳科球虫分类方案基础的优缺点。它给出了仅基于表型特征的当前分类的缺点的具体例子，以及仅使用分子系统发育相关的潜在陷阱。它讨论了当前的争议以及与艾美耳科球虫相关的分类学和命名规则。最后，它建议成立一个国际科学家小组，定期开会，激发进一步的讨论，并就如何实现最终目标，即提出一个修订的、被广泛接受的艾美耳科球虫分类提案，给出指导方向。
