The coralline genera Sporolithon and Heydrichia (Sporolithales, Rhodophyta) clarified by sequencing type material of their generitypes and other species
The coralline genera Sporolithon and Heydrichia (Sporolithales, Rhodophyta) clarified by sequencing type material of their generitypes and other species
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通过对其属型和其他物种的测序类型材料阐明了珊瑚属 Sporolithon 和 Heydrichia（Sporolithales、Rhodophyta）
DOI：
10.1111/jpy.12562
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发表时间：
2017
影响因子：
2.9
通讯作者：
P. Gabrielson
中科院分区：
文献类型：
--
作者：
J. Richards;T. Sauvage;W. Schmidt;S. Fredericq;Jeffery R. Hughey;P. Gabrielson
红藻目孢子体的种间系统学仍然存在问题。为了重新评估其物种，对历史类型材料和最近收集的属于 Sporolithon 和 Heydrichia 两个属的标本进行了 DNA 分析。来自埃及埃尔托的 Sporolithon ptychoides（属型种）和 Sporolithon molle 选型标本的部分 rbcL 序列与现场采集的拓扑型标本完全匹配。 Sporolithon crassum 和 Sporolithon erythraeum 也有相同的模式产地；前者的材料似乎不再存在，我们无法从后者中进行 PCR 扩增 DNA。在同一模式产地描述了一个新种，Sporolithon eltorensis。我们还没有发现任何区分这三个物种的形态解剖特征。世界其他地区没有报道为 S. ptychoides 的测序标本代表该物种，并且基于形态解剖学的 S. ptychoides 和 S. molle 的报告可能是不正确的。来自 Sporolithon dimotum 正型标本的部分 rbcL 序列表明它不是 S. ptychoides 的同义词，来自 S. episporum 正型标本的数据证实了其特定识别。来自Heydrichia woelkerlingii的拓扑型材料、Heydrichia cerasina的属型种和同种型材料的DNA序列证实，这些是不同的物种；据报道，来自新西兰的 H. woelkerlingii 分类单元很可能是一个未被描述的物种。所有其他孢子石属和海德里希亚属物种的模式标本都需要进行测序，以确认它们是不同的物种；形态解剖学研究已证明不足以完成这项任务。
Interspecific systematics in the red algal order Sporolithales remains problematic. To re‐evaluate its species, DNA analyses were performed on historical type material and recently collected specimens assigned to the two genera Sporolithon and Heydrichia. Partial rbcL sequences from the lectotype specimens of Sporolithon ptychoides (the generitype species) and Sporolithon molle, both from El Tor, Egypt, are exact matches to field‐collected topotype specimens. Sporolithon crassum and Sporolithon erythraeum also have the same type locality; material of the former appears to no longer exist, and we were unable to PCR amplify DNA from the latter. A new species, Sporolithon eltorensis, is described from the same type locality. We have not found any morpho‐anatomical characters that distinguish these three species. No sequenced specimens reported as S. ptychoides from other parts of the world represent this species, and likely reports of S. ptychoides and S. molle based on morpho‐anatomy are incorrect. A partial rbcL sequence from the holotype of Sporolithon dimotum indicates it is not a synonym of S. ptychoides, and data from the holotype of S. episporum confirm its specific recognition. DNA sequences from topotype material of Heydrichia woelkerlingii, the generitype species, and isotype material of Heydrichia cerasina confirm that these are distinct species; the taxon reported to be H. woelkerlingii from New Zealand is likely an undescribed species. Type specimens of all other Sporolithon and Heydrichia species need to be sequenced to confirm that they are distinct species; morpho‐anatomical studies have proved inadequate for this task.