SAME BUT DIFFERENT: TWO NOVEL BICARINATE SPECIES OF EXTANT CALCAREOUS DINOPHYTES (THORACOSPHAERACEAE, PERIDINIALES) FROM THE MEDITERRANEAN SEA 1
SAME BUT DIFFERENT: TWO NOVEL BICARINATE SPECIES OF EXTANT CALCAREOUS DINOPHYTES (THORACOSPHAERACEAE, PERIDINIALES) FROM THE MEDITERRANEAN SEA 1
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DOI：
10.1111/j.1529-8817.2012.01182.x
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发表时间：
2012-10
影响因子：
2.9
通讯作者：
Carmen Zinssmeister;Sylvia Soehner;M. Kirsch;E. Facher;K. Sebastian Meier;H. Keupp;and Marc Gottschling
中科院分区：
文献类型：
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作者：
Carmen Zinssmeister;Sylvia Soehner;M. Kirsch;E. Facher;K. Sebastian Meier;H. Keupp;and Marc Gottschling
现存的钙质甲藻（叉囊藻科，甲藻科）的多样性目前还没有充分的记录。它们的大多数球形阶段都是隐板状或完全无板状，而相对较少的形式表现出至少某种程度上比古生孔更多的板状。从地中海沿海表层沉积物样品的调查导致了几个菌株的石灰性甲藻的分离和培养显示出显着的制表。我们调查了泡囊和球状细胞的形态，并进行了系统发育分析，使用最大似然法和贝叶斯方法。球形细胞显示出扣带的明显反射（因此是扣带板的），而囊形态对应于广泛分布和物种丰富的斯氏藻。从分子序列数据（包括81个新的GenBank条目）推断，菌株属于Thoracosphaeraceae的广义斯氏藻分支，代表两个不同的物种。形态学细节同样表明了两个不同的物种与以前未知的球状细胞，我们在这里描述为新的，即S。bicarinata spec. nov.和S. kirschiae spec. nov. Cingulotabulation的结果融合的过程代表前和后扣带板系列在S。bicarinata，而脊代表S. Kirschiae，分别。重脊的cingulotabulation出现homoplasious之间的钙质dinophytes，这是进一步支持的比较相似，但只有远亲的化石形式。
The diversity of extant calcareous dinophytes (Thoracosphaeraceae, Dinophyceae) is currently not sufficiently recorded. The majority of their coccoid stages are cryptotabulate or entirely atabulate, whereas relatively few forms exhibit at least some degree of tabulation more than the archeopyle. A survey of coastal surface sediment samples from the Mediterranean Sea resulted in the isolation and cultivation of several strains of calcareous dinophytes showing a prominent tabulation. We investigated the morphologies of the thecate and the coccoid cells and conducted phylogenetic analyses using Maximum Likelihood and Bayesian approaches. The coccoid cells showed a distinct reflection of the cingulum (and were thus cingulotabulate), whereas thecal morphology corresponded to the widely distributed and species‐rich Scrippsiella. As inferred from molecular sequence data (including 81 new GenBank entries), the strains belonged to the Scrippsiella sensu lato clade of the Thoracosphaeraceae and represented two distinct species. Morphological details likewise indicated two distinct species with previously unknown coccoid cells that we describe here as new, namely S. bicarinata spec. nov. and S. kirschiae spec. nov. Cingulotabulation results from the fusion of processes representing the pre‐ and postcingular plate series in S. bicarinata, whereas the ridges represent sutures between the cingulum and the pre‐ and postcingular series in S. kirschiae, respectively. Bicarinate cingulotabulation appears homoplasious among calcareous dinophytes, which is further supported by a comparison to similar, but only distantly related fossil forms.