On some encrusting Xeniidae (Octocorallia): Re-examination of the type material of Sansibia flava (May, 1898) and a description of new taxa
On some encrusting Xeniidae (Octocorallia): Re-examination of the type material of Sansibia flava (May, 1898) and a description of new taxa
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关于一些有壳的 Xeniidae (Octocorallia)：对 Sansibia flava 模式材料的重新审查（1898 年 5 月）和新类群的描述
DOI：
10.11646/zootaxa.5093.4.3
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发表时间：
2022
期刊：
影响因子：
0.9
通讯作者：
MCFADDEN, CATHERINE S.
中科院分区：
文献类型：
--
作者：
BENAYAHU, YEHUDA;EKINS, MERRICK;OFWEGEN, LEEN P.;SAMIMI-NAMIN, KAVEH;MCFADDEN, CATHERINE S.
本文首次描述了黄三色软珊瑚Sansibia flava（1898年5月）的模式，并对其进行了形态学诊断。随后对相关Xeniidae的分子和形态特征进行了综合分析，包括印度-太平洋的土著物种和大西洋（巴西）的入侵物种，导致描述了一个新的Sansibia物种，以及两个新属，包括另外三个新种。所有这些分类群都是结壳的，息肉直接从扩展的基膜中产生。分子系统发育分析表明，这些属不是姐妹类群，从而进一步强调了显着的系统发育多样性的xeniids与这样的增长形式。所有种的片晶都是均匀的椭圆形血小板，在整个殖民地中都很丰富。这些物种表现出有限的，不重叠的地理范围，在不同的海洋领域发现不同的基因型（分子操作分类单位）。结果强调了重新审查的重要性，原来的老类型的材料，同时应用分子系统发育分析，以划定物种边界，并认识到生物多样性模式。
The type of the xeniid soft coral Sansibia flava (May, 1898) is re-described for the first time and its morphological diagnosis is presented. A subsequent integrated analysis of molecular and morphological characters of related Xeniidae, including species indigenous to the Indo-Pacific Ocean and invasive in the Atlantic (Brazil), led to the description of a new Sansibia species, as well as two new genera comprising an additional three new species. All of these taxa are encrusting, with polyps arising directly from a spreading basal membrane. Molecular phylogenetic analyses show that these genera are not sister taxa, thus further emphasizing the remarkable phylogenetic diversity of xeniids with such a growth form. The sclerites of all species are uniformly ellipsoid platelets, abundant throughout the colony. The species exhibit restricted, non-overlapping geographic ranges, with distinct genotypes (molecular operational taxonomic units) found in different marine realms. The results emphasize the importance of re-examination of original old type material while applying molecular phylogenetic analyses in order to delineate species boundaries and to recognize biodiversity patterns.