Phylogenetic position of <i>Newhousia</i> (Dictyotales, Phaeophyceae) and the description of <i>N. sumayensis sp. nov</i>. from Guam
Phylogenetic position of <i>Newhousia</i> (Dictyotales, Phaeophyceae) and the description of <i>N. sumayensis sp. nov</i>. from Guam
复制标题
<i>Newhousia</i>（网皮藻目，褐藻纲）的系统发育位置和<i>N 的描述。
DOI：
10.1080/00318884.2022.2034364
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发表时间：
2022
期刊：
影响因子：
1.6
通讯作者：
Zubia Mayalen
中科院分区：
文献类型：
--
作者：
Vieira Christophe;Schils Tom;Kawai Hiroshi;D’hondt Sofie;Paiano Monica O.;Sherwood Alison R.;De Clerck Olivier;Zubia Mayalen
发现于太平洋三个新群岛：(1)法属波利尼西亚的社会群岛；(2)马里亚纳群岛的关岛；(3)瓦努阿图。新奥尔西亚不喜欢由小而圆的两层钙化叶片组成的简单形态，形态特征的种间差异有限。因此，解决纽豪西亚的隐秘多样性需要分子系统发育学。基于Cox1、Cox3、PSBA、rbcL和18S rDNA序列构建的贝叶斯和最大似然系统发育树支持纽华亚目与龙目目/带状亚纲的姐妹关系。分析显示，新豪西亚人有五种不同的进化谱系。来自关岛的谱系与两个迄今已知的纽豪西亚种--来自夏威夷和N。来自巴布亚新几内亚的Yaghaas，证明了一新种的描述：N.Sumayensis sp.11月另外两个宗族，来自社会群岛和瓦努阿图，被确定为地理上不同的n人群体。遗传变异有限的覆盖物，而不是独立的物种。在社会群岛，在10米到20米的深度之间，覆膜藻通常是独立的球形结构，或者附着在坚硬的衬底上。在关岛，苏马依新种(N.Sumayensis sp.)11月在10-21米深处的嗜坐性生境中大量生长。我们提供了本属孢子的第一份文献和类似于多室心药的结构。需要在整个印度-太平洋区域增加采样，以进一步阐明新豪西亚物种丰富度的分布范围和模式。
The calcified encrusting brown algal genusNewhousiais reported from three new archipelagos in the Pacific: (1) Society Islands, French Polynesia; (2) Guam, Mariana Islands; and (3) Vanuatu.Newhousiapresents a simple morphology consisting of small, rounded, two-layered calcified blades with limited interspecific variability in morphological features. Consequently, resolving cryptic diversity inNewhousiarequires molecular phylogenetics. Bayesian and maximum likelihood phylogenetic trees, based on the concatenatedcox1,cox3,psbA,rbcL and 18S rDNA sequences, supported a sister relationship ofNewhousiawithLobophora/Zonariaclade. Analyses revealed five distinct evolutionary lineages withinNewhousia. Genetic variation between the lineage from Guam and the two hitherto knownNewhousiaspecies,N. imbricatafrom Hawaii andN. yaghafrom Papua New Guinea, warrant the description of one new species,N. sumayensis sp. nov. The other two lineages, from the Society Islands and Vanuatu, were identified as geographically distinct populations ofN. imbricatawith limited genetic variation, rather than independent species. In the Society Islands,N. imbricatais common between depths of 10 m and 20 m as unattached spherical structures, or attached to hard substrate. In Guam,N. sumayensis sp. nov. grows abundantly in sciophilous habitats at depths of 10–21 m. We provide the first documentation of spores for this genus and of structures resembling plurilocular antheridia. Increased sampling throughout the Indo-Pacific region is required to further elucidate the distribution range and patterns of species richness inNewhousia.