Fukuyoa paulensis gen. et sp. nov., a new genus for the globular species of the dinoflagellate Gambierdiscus (Dinophyceae).
Fukuyoa paulensis gen. et sp. nov., a new genus for the globular species of the dinoflagellate Gambierdiscus (Dinophyceae).
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Fukuyoa paulensis gen.
DOI：
10.1371/journal.pone.0119676
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Lin S
中科院分区：
文献类型：
--
作者：
Gómez F;Qiu D;Lopes RM;Lin S
海洋附生甲藻Gambierdiscus是一个重要的毒理学属，负责雪卡毒鱼类中毒，非细菌性疾病的主要原因与鱼类消费。该属目前包含的物种表现出球状或前后压缩的形态与细胞形状和板排列的显着差异。在这里，我们报告的第三个球状，附生和tychoacetonic种从乌巴图巴，巴西海岸。新种与G. yasumotoi和G. ruetzleri通过其更宽的第一顶板占据了更大部分的上皮。因此，小亚基（SSU）和大亚基（LSU）核糖体DNA序列的系统发育树也显示了强有力的支持，从G。安本湾Ruetzleri组，但距离较短。分子进化，其中包括新的序列的goniocellulopolyedricum，进一步表明，球状物种的Gambierdiscus形成了一个紧密的分支，明确分离（强大的引导支持）的透镜状物种的分支，包括Gambierdiscus的类型。形态学和分子生物学数据一致支持广义冈比亚盘菌分为两个属。Gambierdiscus sensu stricto应保留给具有透镜状、前后高度压缩、短柄鱼钩状顶孔板、大2 '板、低且上升的扣带移位和袋状沟形态的物种。新属名Fukuyoa gen. nov.应适用于球状种，轻微横向压缩，长柄鱼钩顶端孔板，大1 '板，更大和下降的环带位移，而不是袋状垂直取向的沟形态。Fukuyoa含有一新种Fukuyoa paulensis gen. et sp. nov.，和f. yasumotoi comb.nov.和F.吕茨勒里组合
The marine epiphytic dinoflagellate Gambierdiscus is a toxicologically important genus responsible for ciguatera fish poisoning, the principal cause of non-bacterial illness associated with fish consumption. The genus currently contains species exhibiting either globular or anterior-posteriorly compressed morphologies with marked differences in cell shape and plate arrangement. Here we report a third globular, epiphytic and tychoplanktonic species from the coasts of Ubatuba, Brazil. The new species can be distinguished from G. yasumotoi and G. ruetzleri by its broader first apical plate that occupies a larger portion of the epitheca. Accordingly, phylogenetic trees from small subunit (SSU) and large subunit (LSU) ribosomal DNA sequences also showed strongly supported separation of the new species from the G. yasumotoi / G. ruetzleri group albeit with short distance. The molecular phylogenies, which included new sequences of the planktonic species Goniodoma polyedricum, further indicated that the globular species of Gambierdiscus formed a tight clade, clearly separated (with strong bootstrap support) from the clade of lenticular species including the type for Gambierdiscus. The morphological and molecular data in concert support the split of Gambierdiscus sensu lato into two genera. Gambierdiscus sensu stricto should be reserved for the species with lenticular shapes, highly compressed anterioposteriorly, with short-shank fishhook apical pore plate, large 2' plate, low and ascending cingular displacement, and pouch-like sulcal morphology. The new genus name Fukuyoa gen. nov. should be applied to the globular species, slightly laterally compressed, with long-shank fishhook apical pore plate, large 1' plate, greater and descending cingular displacement, and not pouch-like vertically-oriented sulcal morphology. Fukuyoa contains the new species Fukuyoa paulensis gen. et sp. nov., and F. yasumotoi comb. nov. and F. ruetzleri comb. nov.
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