The fern genus Lepisorus represents one of the most complicated and controversial lineages in Polypodiaceae, with about 80 species which have been classified into several separate genera, and is notorious for its taxonomic difficulty. Despite progress in recent phylogenetic studies of the family Polypodiaceae involving Lepisorus and its allies, the deep phylogenetic relationship within this group of ferns is still unresolved, and no formal infrageneric classification has been proposed. This contribution presents the most comprehensive phylogenetic analysis of the genus, with 72% species sampled, using a total‐evidence approach based on eight plastid markers and ≤25 morphological characters for each species. The analyses resolve the backbone relationship and yield the most robust phylogenetic framework to date. Congruent with previous studies but with new findings, the results herein show that Lepisorus is monophyletic when Neolepisorus, Lemmaphyllum, Tricholepidium, Neocheiropteris and Lepidomicrosorium are included, as well as Lepisorus jakonensis and Paragramma. Furthermore, 17 well‐resolved clades are found in the phylogenetic topology, which can be characterized by morphological synapomorphies from traits of rhizome scales, laminae, sori and paraphyses. Based on molecular and morphological evidence, a new infrageneric classification system of Lepisorus is proposed which subdivided Lepisorus into 17 sections.

中文翻译：

---

Lepisorus (Polypodiaceae) 的骨干系统发育和基于质体和形态学数据的全部证据的新的属下分类

蕨类植物 Lepisorus 代表了水蕨科中最复杂和最有争议的谱系之一，大约有 80 种，被分为几个独立的属，并且因其分类困难而臭名昭著。尽管最近对涉及 Lepisorus 及其同属植物的 Polypodiaceae 家族的系统发育研究取得了进展，但这组蕨类植物内部的深层系统发育关系仍未得到解决，并且没有提出正式的属下分类。该贡献提供了对该属最全面的系统发育分析，对 72% 的物种进行了采样，使用基于 8 个质体标记和每个物种≤25 个形态特征的全证据方法。这些分析解决了主干关系并产生了迄今为止最强大的系统发育框架。与以前的研究一致，但有新的发现，本文的结果表明，当包括 Neolepisorus、Lemmaphyllum、Tricholepidium、Neocheiropteris 和 Lepidomicrosorium，以及 Lepisorus jakonensis 和 Paragramma 时，Lepisorus 是单系的。此外，在系统发育拓扑学中发现了 17 个很好分辨的进化枝，其特征在于根茎鳞片、薄片、sori 和 paraphyses 特征的形态突触。基于分子和形态学证据，提出了一种新的鳞翅目亚属分类系统，将鳞甲龙分为17个部分。在系统发育拓扑学中发现了 17 个很好分辨的进化枝，其特征在于根茎鳞片、薄片、sori 和 paraphyses 特征的形态突触。基于分子和形态学证据，提出了一种新的鳞翅目亚属分类系统，将鳞甲龙分为17个部分。在系统发育拓扑学中发现了 17 个很好分辨的进化枝，其特征在于根茎鳞片、薄片、sori 和 paraphyses 特征的形态突触。基于分子和形态学证据，提出了一种新的鳞翅目亚属分类系统，将鳞甲龙分为17个部分。