Tillmann Urban, Gottschling Marc, Nézan Elisabeth, Krock Bernd, Bilien Gwenaël
Alfred Wegener Institute, Am Handelshafen 12, D-27570 Bremerhaven, Germany.
Department Biologie, Systematische Botanik und Mykologie, GeoBio-Center, Ludwig-Maximilians-Universität München, Menzinger Str. 67, D-80638 München, Germany.
Protist. 2014 Aug;165(4):417-44. doi: 10.1016/j.protis.2014.04.004. Epub 2014 May 2.
Some species of the planktonic dinoflagellate genus Azadinium produce azaspiracids (AZAs), a group of lipophilic phycotoxins causing human poisoning after mussel consumption. We describe three new species from the North Atlantic, all of which shared the same Kofoidean plate pattern characteristic for Azadinium: Po, cp, X, 4', 3a, 6″, 6C, 5S, 6'″, 2″″. Azadinium trinitatum sp. nov. was mainly characterized by the presence of an antapical spine and by the position of the ventral pore at the left distal end of the pore plate in a cavity of plate 1'. Azadinium cuneatum sp. nov. had a conspicuously formed first apical plate, which was asymmetrically elongated and tapered on its left lateral side with a ventral pore located at the tip of this elongated 1' plate. Azadinium concinnum sp. nov. was of particular small size (< 10μm) and characterized by an anteriorly elongated anterior sulcal plate and by large and symmetric precingular plates. The ventral pore was located inside the apical pore plate on the cells' right lateral side. Molecular phylogenetics as inferred from concatenated SSU rRNA, ITS, and LSU rRNA sequence data supported the distinctiveness of the three new species. None of the new species produced any known AZAs in measurable amounts.
浮游性甲藻属Azadinium的一些物种会产生氮杂螺旋酸（AZAs），这是一类亲脂性藻毒素，人类食用贻贝后会导致中毒。我们描述了来自北大西洋的三个新物种，它们都具有Azadinium特有的相同的科福伊德板模式：Po、cp、X、4'、3a、6″、6C、5S、6'″、2″″。新种三硝基氮杂螺旋藻主要特征是存在一个反顶刺，以及腹孔位于孔板左侧远端1'板腔内。新种楔形氮杂螺旋藻具有明显形成的第一顶生板，其不对称伸长并在左侧逐渐变细，腹孔位于这个伸长的1'板的尖端。新种精巧氮杂螺旋藻特别小（<10μm），其特征是前沟板向前伸长，以及大且对称的前扣带板。腹孔位于细胞右侧的顶孔板内。根据串联的SSU rRNA、ITS和LSU rRNA序列数据推断的分子系统发育学支持这三个新物种的独特性。这些新物种均未产生任何可测量量的已知AZAs。
