Phylogeny and classification of the tribe Lepisoreae (Polypodiaceae; pteridophyta) with the description of a new genus, Ellipinema gen. nov., segregated from Lepisorus.,Molecular Phylogenetics and Evolution

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Phylogeny and classification of the tribe Lepisoreae (Polypodiaceae; pteridophyta) with the description of a new genus, Ellipinema gen. nov., segregated from Lepisorus.
Molecular Phylogenetics and Evolution ( IF 3.6 ) Pub Date : 2020-03-23 , DOI: 10.1016/j.ympev.2020.106803
Liang Zhang ₁ , Xin-Mao Zhou ₂ , Zhen-Long Liang ₃ , Xue-Ping Fan ₃ , Ngan Thi Lu ₄ , Min-Shu Song ₅ , Ralf Knapp ₆ , Xin-Fen Gao ₃ , Hang Sun ₅ , Li-Bing Zhang ₇

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Lepisoroid ferns (tribe Lepisoreae, Polypodiaceae) are arguably one of the most confusing fern groups in Polypodiaceae in terms of delimitation of genera largely because of their simple morphology. Previous molecular studies either had very small taxon sampling of the non-Lepisorus genera and did not well resolve the relationships among these genera, or had a relatively large sampling at species level but the critical species were missing or their relationships were not well resolved. A recent study resolved the newly sampled Lepisorus jakonensis as sister to the remaining genera in Lepisoreae excluding Paragramma, and the authors lumped all the six well recognized genera into Lepisorus. In the present study, to infer a phylogeny we used DNA sequences of five plastid markers (matK, rbcL, rbcL-atpB, rps4 &rps4-trnS, trnL &trnL-F) of 172 accessions representing ca. 44 species of non-Lepisorus genera and 54 accessions representing ca. 50 species of Lepisorus as ingroup, and 10 non-Lepisoreae accessions from the most closely related four genera (Leptochilus, Microsorum, Phymatosorus, and Goniophlebium) in Microsoroideae and one genus (Pyrrosia) in Platycerioideae. Our major results include: (1) All seven currently defined genera except Lepisorus in Lepisoreae are confirmed to be monophyletic; (2) The Lepisorus jakonensis clade is confirmed to be the second earliest diverged lineage in Lepisoreae; (3) Neolepisorus is resolved as sister to the rest in a clade containing all non-Lepisorus genera except Paragramma; (4) Lemmaphyllum is sister to a clade containing Lepidomicrosorium, Neocheiropteris, and Tricholepidium; and (5) Ellipinema gen. nov. is segregated from Lepisorus based on the phylogeny and morphology in order to stabilize the current usage of the existing six non-Lepisorus genera and species names in these genera. A key to all eight genera of Lepisoreae is provided.

中文翻译：

鳞翅目（Polypodiaceae； pteridophyta）部落的系统发育和分类，并描述了一个新属Ellipinema gen。11月，与Lepisorus隔离。

就属的定界而言，类异形蕨类植物（Lepisoreae，Polypodiaceae）可以说是Polypodiaceae中最令人困惑的蕨类之一，主要是因为它们的形态简单。先前的分子研究要么对非Lepisorus属的分类单元进行了非常小的采样，而且不能很好地解析这些属之间的关系，或者在物种水平上进行了相对较大的采样，但是关键物种缺失或它们的关系没有得到很好的解决。最近的一项研究将新近采集的雅加达钩端螺旋体（Lepisorus jakonensis）解析为鳞翅目（Lepisoreae）其余属（不包括Paragramma）的姐妹，并将这六个广为人知的属归纳为钩端螺旋体。在本研究中，为了推断系统发育，我们使用了五个质体标记（matK，rbcL，rbcL-atpB，rps4和rps4-trnS，trnL和 trnL-F）的约172个种质非鳞翅目属的44种和约54个种代表。细小纲目中有50种钩端螺旋体作为成群，而最亲缘关系最密切的4个属（细翅目，细so，Phymatosorus和淋病菌）有10种非鳞翅目，而侧柏科则有1个属（火霉）。我们的主要结果包括：（1）确诊了除镰孢属中的钩端螺旋体以外的所有七个当前属；（2）雅各氏Lepisorus jakonensis进化枝被确认为Lepisoreae中第二最早的分化谱系。（3）新鞭毛虫在与其他所有非鞭毛虫属不同的进化枝中被解析为其余的姐妹，除了帕拉格拉玛；（4）Lemmaphyllum是包含Lepidomicrosorium，Neocheiropteris和Tricholepidium的进化枝的姐妹；（5）Ellipinema gen。十一月根据系统发育和形态将其与Lepisorus隔离，以稳定当前使用的六个非Lepisorus属和这些属的物种名称。提供了鳞翅目所有八个属的钥匙。

更新日期：2020-03-26

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