ABSTRACT

Plagiochila is the most diverse genus of liverwort by number of described species, with 1600 validly published names. The typification and application of names within the context of such nomenclatural diversity is therefore critical. Typification statements made over five decades of revisionary study for 95 validly published species names, and two varieties, in Australasian Plagiochilaceae are reviewed with reference to the International Code of Nomenclature for algae, fungi, and plants (Code) and the citation of original material in the protologue, to establish for each the type specimens and their status. This review serves two purposes, firstly to confirm type specimen status given the recent suggestion that type citations by Bonner in Index Hepaticarum Volume 1 not be accepted as effective (if inadvertent) lectotypifications; and secondly to provide a data-based assessment of typification practice with reference to a relatively well-studied bryophyte group. None of the works reviewed were error-free with regards to typification practice. The most common errors were the citation of a holotype when none exists, and neglecting earlier type citation statements and their context. However, no instance where these errors impacted the application of names was found, implying authors are generally conscientious in their identification of original material. Three recommendations to improve typification practice are made: firstly, taxonomists need to utilise available online biodiversity resources to establish for themselves the original material and its context; secondly, greater scrutiny of type statements in existing primary and secondary literature is required; and thirdly, we need proactive education and self-education in the Code’s requirements.

摘要

按描述物种的数量，斜柏属是地艾属中最多样化的属，有1600种有效公布的名称。因此，在这种术语多样性的背景下名称的典型化和应用至关重要。参照国际藻类，真菌和植物命名法典（Code）以及该文献中对原始材料的引用，回顾了经过数十年的修订研究，对在澳大利亚的斜纹鱼类中的95个有效发布的物种名称和两个变种进行了十多年的分类声明。原型，为每种类型的标本及其状态确定。这项审查有两个目的，首先是根据最近的建议，即Bonner在Index Hepaticarum中对类型的引用，确定类型标本的状态第1卷不被认为是有效的（如果不经意间）选型；其次，参考经过深入研究的苔藓植物群，对典型实践进行基于数据的评估。在典型实践方面，所审查的作品均无错误。最常见的错误是在不存在完整类型的情况下进行引用，而忽略早期的类型引用语句及其上下文。但是，没有发现这些错误影响名称应用的情况，这表明作者在识别原始资料时通常会尽心尽责。提出了三个改进典型实践的建议：首先，分类学家需要利用可用的在线生物多样性资源为自己确定原始材料及其背景。其次，需要在现有的主要和次要文献中对类型声明进行更严格的审查；第三，我们需要在社区中进行积极的教育和自我教育。代码的要求。