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首页> 外文期刊>Coral reefs: journal of the International Society for Reef Studies >Taxonomy and species boundaries in the coral genus Favia Milne Edwards and Haime, 1857 (Cnidaria: Scleractinia) from Thailand revealed by morphological and genetic data
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Taxonomy and species boundaries in the coral genus Favia Milne Edwards and Haime, 1857 (Cnidaria: Scleractinia) from Thailand revealed by morphological and genetic data

机译：形态和遗传数据揭示了泰国的珊瑚属Favia Milne Edwards和Haime（1857年，刺胞藻）的分类学和物种边界

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摘要

While Faviidae is a widely and uniformly distributed coral family throughout the Indo-Pacific, the extensive phenotypic plasticity of colony surface and corallite features often confounds the use of macromorphological characters in species identification, and contributes to conflict between traditional classification and molecular analyses of the group. Recent advances in morphological and molecular techniques now provide a suite of methods to re-address coral taxonomy in complex groups, such as that represented by the Faviidae. This study combines morphologic measurements including "3D coordinates landmarks" data with phylogenetic assessments of nuclear (ITS) and mitochondrial (COI-trnM) DNA to assess species boundaries in nine species of Faviidae with para-septothecal walls from Thailand. Strong concordance was found between morphological features and a priori groupings based on both morphospecies and genetically defined groups (ITS and COI-trnM). Favia truncatus was the most well-defined species based on morphological analyses, and it was also shown to be monophyletic using phylogenetic analyses. Besides F. truncatus, the only other species that was found to be monophyletic in analyses of both genes was F. cf. helianthoides, but its skeletal morphology overlapped with the F. favus species complex (comprised of F. favus, F. speciosa, F. matthaii and F. rotumana). Although not genetically monophyletic, the F. favus species complex and F. pallida were fairly well delineated morphologically. Morphospecies within the F. favus species complex are therefore possibly a result of genetic drift and/or stable polymorphisms driven by divergent selection. These results represent a first step toward a taxonomic revision of the Indo-Pacific Favia, which will integrate morphological methods with the study of type material, genetic information, reproductive data, and tests of phenotypic plasticity-given that multiple lines of evidence are needed to resolve ambiguous species and assign species names.
机译：虽然Faviidae是整个印度太平洋中一个分布广泛且均匀分布的珊瑚科，但殖民地表面和珊瑚岩特征的广泛表型可塑性经常使宏观形态学特征在物种识别中的使用变得混乱，并导致传统分类与该群体的分子分析之间的冲突。形态学和分子技术的最新进展现在提供了一套方法，可以重新解决复杂群体中的珊瑚生物分类问题，例如以F科为代表的方法。这项研究将形态学测量结果（包括“ 3D坐标地标”数据）与核（ITS）和线粒体（COI-trnM）DNA的系统发育评估相结合，以评估9种来自泰国的准剑鞘壁的Faviidae的物种边界。在形态特征和基于形态物种和遗传定义的组（ITS和COI-trnM）的先验分组之间发现强烈的一致性。根据形态学分析，截叶青冈（Favia truncatus）是定义最明确的物种，并且使用系统发育分析也表明它是单系的。除截短镰刀菌外，在两个基因的分析中唯一被发现具有单系性的物种是镰刀菌。 helianthoides，但其骨骼形态与F. favus物种复合物（由F. favus，F。speciosa，F。matthaii和F. rotumana组成）重叠。尽管不是单基因的，但F. favus物种复合体和F. pallida在形态学上已被很好地描绘出来。因此，F。favus物种复合体中的形态物种可能是遗传变异和/或由不同选择驱动的稳定多态性的结果。这些结果代表了对印度太平洋Favia分类学修订的第一步，该研究将形态学方法与类型材料，遗传信息，生殖数据和表型可塑性的研究相结合，因为需要多条证据来解决歧义物种并分配物种名称。

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