Phylogenetic position and taxonomy of Cycloseris explanulata and C. wellsi (Scleractinia: Fungiidae): lost mushroom corals find their way home
Phylogenetic position and taxonomy of Cycloseris explanulata and C. wellsi (Scleractinia: Fungiidae): lost mushroom corals find their way home
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DOI：
10.1163/18759866-08103001
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发表时间：
2012-01-01
影响因子：
2.2
通讯作者：
Hoeksema, Bert W.
中科院分区：
文献类型：
--
作者：
Benzoni, Francesca;Arrigoni, Roberto;Hoeksema, Bert W.
硬核动物种Psammocora解释和Coscinaraea wellsi最初被归类为铁豆科，但在最近的形态分子研究中，它们与真菌科的关系比与任何铁豆分类群的关系更密切。随后对真菌科的形态分子研究为该科的系统发育关系提供了新的见解。本研究对两个科的现有分子数据集与新标本和新序列进行了分析。结果表明，这两个物种实际上属于真菌科的环系分支。基于博物馆标本和最近收集的材料对其形态特征的重新评估证实了分子结果。因此，它们被重新命名为Cycloseris explulata和C. wellsi。它们像C. mokai一样多口结壳，C. mokai是最近加入该属的另一个物种，而所有的Cycloseris物种最初都被认为是单口的和自由生活的。根据这些新发现，本文对C. explulata和C. wellsi的分类和分布资料进行了更新和修订。最后，讨论了三种覆壳多口环系物种及其自由生活的单口同系物的进化史的生态学意义。
The scleractinian species Psammocora explanulata and Coscinaraea wellsi were originally classified in the family Siderastreidae, but in a recent morpho-molecular study it appeared that they are more closely related to each other and to the Fungiidae than to any siderastreid taxon. A subsequent morpho-molecular study of the Fungiidae provided new insights regarding the phylogenetic relationships within that family. In the present study existing molecular data sets of both families were analyzed jointly with those of new specimens and sequences of P. explanulata and C. wellsi. The results indicate that both species actually belong to the Cycloseris clade within the family Fungiidae. A reappraisal of their morphologic characters based on museum specimens and recently collected material substantiate the molecular results. Consequently, they are renamed Cycloseris explanulata and C. wellsi. They are polystomatous and encrusting like C. mokai, another species recently added to the genus, whereas all Cycloseris species were initially thought to be monostomatous and free-living. In the light of the new findings, the taxonomy and distribution data of C. explanulata and C. wellsi have been updated and revised. Finally, the ecological implications of the evolutionary history of the three encrusting polystomatous Cycloseris species and their free-living monostomatous congeners are discussed.