Zoanthids (Anthozoa, Hexacorallia) from the Great Barrier Reef and Torres Strait, Australia: Systematics, evolution and a key to species
Zoanthids (Anthozoa, Hexacorallia) from the Great Barrier Reef and Torres Strait, Australia: Systematics, evolution and a key to species
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DOI：
10.1007/s003380050060
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发表时间：
1997-02-01
期刊：
影响因子：
3.5
通讯作者：
Ryland, JS
中科院分区：
文献类型：
--
作者：
Burnett, WJ;Benzie, JAH;Ryland, JS
Zoanthid分类学目前处于混乱状态，许多描述的物种中很少有可以可靠地鉴定的。作为一个遗传基础上的一部分，客观的重新评估的数量北方澳大利亚物种，共355 zoanthid标本收集了19个地点在大堡礁和托雷斯海峡在1992-1994年。标本，最初分配到10个形态或生态形式之一，进行等位酶电泳分析。对遗传数据的分析显示，只有七个离散的（即，非杂交）的群。这些群体由固定的基因差异界定，被认为是生物物种概念下的物种。一些物种表现出相当大的形态变异，并具有广泛的环境耐受性。我们提供了第一个关键的大堡礁zoanthid物种根据我们的结果和观察。根据总的群体形态、砂壳习性、水螅形态和生境，可在野外进行种的区分。遗传数据也被用来生成一个系统发育假说的关系之间的Zoanthidae，这是比较以前的形态为基础的系统。根据系膜排列划分的组似乎是合理的，但在该组的系统发育研究中，囊泡数据的价值似乎低于以前的建议。
Zoanthid taxonomy is currently in a state of chaos, with many described species very few of which can be reliably identified. As part of a genetically based, objective reappraisal of the number of northern Australian species, a total of 355 zoanthid specimens were collected from 19 localities in the Great Barrier Reef and Torres Strait during 1992-1994. Specimens, initially assigned to one of ten morphological or ecological forms, were subjected to allozyme electrophoretic analysis. Analysis of genetic data revealed only seven discrete (i.e., non-interbreeding) groups in the family Zoanthidae. These groups, which are delimited by fixed gene differences, are considered species under a biological species concept. Some species show considerable morphological variation and have broad environmental tolerances. We provide the first key to Great Barrier Reef zoanthid species based on our results and observations. Species can be differentiated in the field on the basis of gross colony morphology, sand encrusting habit, polyp form and habitat. Genetic data are also used to generate a phylogenetic hypothesis of relationships among the Zoanthidae, which is compared to previous morphologically based systems. Division of the group on the basis of mesenterial arrangement appears justified, but nematocyst data appear less valuable in phylogenetic studies of the group than has been suggested previously.