An integrated morphological/molecular approach reveals new insights on the systematics of the octocoral Telestula humilis (Thomson, 1927) (Octocorallia:Alcyonacea:Clavulariidae)
An integrated morphological/molecular approach reveals new insights on the systematics of the octocoral Telestula humilis (Thomson, 1927) (Octocorallia:Alcyonacea:Clavulariidae)
复制标题
综合形态学/分子方法揭示了对八珊瑚 Telestula humilis 系统学的新见解（Thomson，1927）（Octocorallia：Alcyonacea：Clavulariidae）
DOI：
10.1071/is20009
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发表时间：
2021
影响因子：
2.2
通讯作者：
Gilbert M. Thomas P.
中科院分区：
文献类型：
--
作者：
Poliseno Angelo;Altuna Alvaro;Puetz Lara C.;Mak Sarah S. T.;R?os Pilar;Petroni Emily;McFadden Catherine S.;S?rensen Martin V.;Gilbert M. Thomas P.
Telestula humilis（Thomson，1927）是一种罕见的深海匍匐茎珊瑚，分布于东大西洋。在这里，我们比较了七个假定的殖民地，这个物种收集了西班牙与摩纳哥海洋博物馆的标本，发现它们在形态上是相同的。完整的有丝分裂基因组和串联的比对包含两个mtDNA基因（mtMutS和Cox1）和核28S rRNA基因的系统发育分析恢复Telestula humilis的姐妹Incrustatus和Inconstantia，而不是Telestula的其他物种。因此，这支持其分类重新分配的Pseudotelestula gen. nov.作为Pseudotelestula humilis comb. nov.的分类重新分配也支持之间观察到的细微差异的形态学的殖民地和硬结的Pseudotelestula humilis comb. nov.和两个姐妹属。Telestula和Pseudotelestula gen. nov.在成虫息肉的胃腔基部都有一个带片的侵入组织，但Pseudotelestula gen. nov.的片在触手下方呈环状排列，花萼壁和匍匐茎的片为丰满的疣状纺锤体，侵入组织有长棍和纺锤体，纺锤体上有锥形刺。
Telestula humilis (Thomson, 1927) is a rare deep-sea stoloniferan octocoral distributed in the eastern Atlantic. Here we compared seven putative colonies of this species collected off Spain with the lectotype from the Oceanographic Museum of Monaco and found them to be identical morphologically. Phylogenetic analyses on both full mitogenomes and a concatenated alignment containing two mtDNA genes (mtMutS and Cox1) and nuclear 28S rRNA gene recovered Telestula humilis sister to Incrustatus and Inconstantia rather than to other species of Telestula. This therefore supports its taxonomic reassignment to Pseudotelestula gen. nov. as Pseudotelestula humilis comb. nov. The taxonomic reassignment is also supported by subtle differences observed between the morphology of the colony and the sclerome of Pseudotelestula humilis comb. nov. and the two sister genera. The occurrence of an intrusion tissue with sclerites in the basal part of the gastric cavity of the adult polyps is shared among Telestula and Pseudotelestula gen. nov. However, Pseudotelestula gen. nov. has sclerites arranged in a collaret and points below the tentacles, the sclerites of the calyx wall and the stolon are plump warty spindles, and the intrusion tissue has long sticks and spindles with cone-like spines.