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首页> 外文期刊>Systematic Botany >Pleurostylia serrulata and Two Allied New Species from Africa are Actually Members of the New World Crossopetalum (Celastraceae)
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Pleurostylia serrulata and Two Allied New Species from Africa are Actually Members of the New World Crossopetalum (Celastraceae)

机译：来自非洲的Pleurostylia Serrulata和两种盟友的新物种实际上是新世界横向术（Celastraceae）的成员

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摘要

Based on phylogenetic analyses using rDNA and plastid sequence data, and the examination of morphological characters, we infer that Pleurostylia, as currently delimited, is a polyphyletic group. Pleurostylia serrulata and two newly described species from Africa are part of the New World Crossopetalum lineage. By contrast, Pleurostylia s. s. consists of all remaining species, which form a clade nested within a primarily Malagasy lineage. We present preliminary evidence that Pleurostylia opposita, the most geographically widespread species in the entire Celastraceae family, may include cryptic species. Although molecular evidence supports the monophyly of Crossopetalum, this genus does not appear to be well defined by a single morphological synapomorphy, rather the following combination of character states is diagnostic: 4-merous flowers; stamens inserted in the sinuses of a +/- 4-lobed intrastaminal floral disk; pistil (2-or) 4-locular with one atropous ovule per locule; stigma conspicuously (2-) 4-branched; drupe usually single seeded and asymmetric with an excentric style remnant; and seeds exarillate with ramified postchalazal bundles visible on the surface and with endosperm present. A taxonomic treatment of Crossopetalum in Africa is presented, in which the new combination Crossopetalum serrulatum is proposed and two new species, C. bokdamii and C. mossambicense, are described and their conservation status assessed.
机译：基于使用RDNA和Plastid序列数据的系统发育分析，以及形态特征的检查，我们推断目前界定的胸膜炎是一种多晶组。来自非洲的Pleurostylia Serrulata和两个新描述的物种是新的世界横向术语血统的一部分。相比之下，胸膜炎症状。 s。由所有剩余物种组成，这些物种形成了一个嵌套在主要的马尔加什血统的血统。我们提出初步证据表明，全部Celastraceae家族中最具地理上广泛的物种，胸膜炎互联网可能包括隐秘物种。虽然分子证据支持横向体的一定程度，但这种属于单一形态突触形态似乎没有明细定义，而是以下性格状态的结合是诊断：4份花;雄蕊插入+/- 4瓣腹部花盘的鼻窦;雌蕊（2-或）4-基座，每场一定的异胚;耻辱显着（2-）4分支; Drupe通常是单身播种和不对称，偏心式残余物;和籽粒籽粒与在表面上可见的分枝后束和胚乳存在。提出了非洲横向事件的分类物理治疗，其中提出了新的组合横向术血浆，并描述了两种新的物种C.Bokdamii和C.Mossambicense，并评估其保护状况。

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