Bryce Monika, Poliseno Angelo, Alderslade Philip, Vargas Sergio
Western Australian Museum, Locked Bag 49, Welshpool DC, Perth, Western Australia 6986, Australia. Queensland Museum, PO Box 3300, South Brisbane BC, Queensland 4101, Australia.; Email:
Department of Earth & Environmental Sciences, Paleontology & Geobiology Ludwig-Maximilians-University Munich, Richard-Wagner Strasse 10, 80333 Munich,Germany.; Email: unknown.
Zootaxa. 2015 May 26;3963(2):160-200. doi: 10.11646/zootaxa.3963.2.2.
We report on digitate and capitate Octocorallia within the genera Parasphaerasclera McFadden & Ofwegen, 2013, Eleutherobia Pütter, 1900, Sphaerasclera McFadden & Ofwegen, 2013, and Paraminabea Williams & Alderslade, 1999 from tropical Western Australian waters. Three new species (Parasphaerasclera kimberleyensis, Eleutherobia australiensis, Eleutherobia imaharai) are described, with a discussion of their taxonomic placement in the light of a recent treatment of the genus Eleutherobia and related taxa by McFadden & Ofwegen (2013). In addition, range extensions for three species are reported, Parasphaerasclera grayi (Thomson & Dean, 1931) known from Indonesia and the Pacific Ocean, Eleutherobia somaliensis Verseveldt & Bayer, 1988 from Somalia, and Eleutherobia splendens (Thomson & Dean, 1931) recorded from Indonesia and the Philippines. Additionally, one new Australian geographical record (Sphaerasclera flammicerebra) (Williams, 2003) with a known distribution from Palau to Mauritius, has been included. We complement morphological taxonomy with molecular data (mtMutS, 28S rDNA) to analyse and clarify phylogenetic placement of these species. The mitochondrial mtMutS phylogeny supported Eleutherobia, Paraminabea, Parasphaerasclera and Sphaerasclera as distinct monophyletic genera. Phylogenetic analyses based on 28S rDNA lacked resolution and were largely unresolved. Additionally, the molecular data corroborated our proposed morphological hypothesis of the placement of the new species P. kimberleyensis sp. nov. with no anthocodial armature in the genus Parasphaerasclera, and the assignment of the new species, E. australiensis sp. nov. and E. imaharai sp. nov., with distinct polyps sclerites in the genus Eleutherobia.
我们报告了2013年麦克法登和奥夫韦根描述的Parasphaerasclera属、1900年普特尔描述的Eleutherobia属、2013年麦克法登和奥夫韦根描述的Sphaerasclera属以及1999年威廉姆斯和阿尔德斯拉德描述的Paraminabea属中的指状和头状八放珊瑚，这些珊瑚来自热带西澳大利亚海域。描述了三个新物种（金伯利Parasphaerasclera、澳大利亚Eleutherobia、伊玛哈拉Eleutherobia），并根据麦克法登和奥夫韦根（2013年）对Eleutherobia属及相关类群的最新处理讨论了它们的分类地位。此外，报告了三个物种的分布范围扩展情况，即已知分布于印度尼西亚和太平洋的格雷氏Parasphaerasclera（汤姆森和迪恩，1931年）、来自索马里的索马里Eleutherobia（弗斯韦尔德特和拜尔，1988年）以及记录于印度尼西亚和菲律宾的华丽Eleutherobia（汤姆森和迪恩，1931年）。此外，还纳入了一个新的澳大利亚地理记录（火焰脑Sphaerasclera）（威廉姆斯，2003年），其已知分布范围从帕劳到毛里求斯。我们用分子数据（线粒体MutS、28S核糖体DNA）补充形态分类学，以分析和阐明这些物种的系统发育位置。线粒体mtMutS系统发育支持Eleutherobia、Paraminabea、Parasphaerasclera和Sphaerasclera为不同的单系属。基于28S核糖体DNA的系统发育分析缺乏分辨率，大多未得到解决。此外，分子数据证实了我们提出的关于新物种金伯利Parasphaerasclera在Parasphaerasclera属中无花萼骨片的形态学假设，以及新物种澳大利亚Eleutherobia和伊玛哈拉Eleutherobia在Eleutherobia属中有独特的珊瑚虫骨片的分类。
