MICROCOSTATUS GEN. NOV., A NEW AEROPHILIC DIATOM GENUS BASED ON NAVICULA KRASSKEI HUSTEDT
MICROCOSTATUS GEN. NOV., A NEW AEROPHILIC DIATOM GENUS BASED ON NAVICULA KRASSKEI HUSTEDT
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DOI：
10.1080/0269249x.1998.9705436
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发表时间：
1998-05
期刊：
影响因子：
1.8
通讯作者：
J. Johansen;Julie C. Sray
中科院分区：
文献类型：
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作者：
J. Johansen;Julie C. Sray
克氏舟形藻（Navicula krasskei）胡斯特（Hustedt）被认为是属于Fallacia festiva（Krasske）Mann & Stickle和F. monoculata（胡斯特）Mann & Stickle.对N. krasskei在扫描电镜显示，这分类群不，事实上，与Fallacia或Navicula sensu stricto共享特征。克氏舟形藻的不同之处在于在光学显微镜下有明显的纵线。此外，在N. krasskei，纹不越过这条线，因为他们在Fallacia。与Fallacia不同的是，Navicula krasskei没有锥孔。最后，在瓣膜的重度硅化边缘和重度硅化轴向区域之间的区域存在一系列外部肋。由于这些独特的特征，我们建议在舟形藻科中形成一个新属N。krasskei，Microcostatus gen. nov.
Navicula krasskei Hustedt has been considered to belong to the group of diatoms including Fallacia festiva (Krasske) Mann & Stickle and F. monoculata (Hustedt) Mann & Stickle. Examination of N. krasskei in the SEM revealed that this taxon does not, in fact, share features with either Fallacia or Navicula sensu stricto. Navicula krasskei differs in possessing a distinct longitudinal line visible in the light microscope. Further, in N. krasskei, the striae do not cross this line as they do in Fallacia. Also differing from Fallacia, Navicula krasskei lacks a conopeum. Finally, a series of external costae are present in the area between the heavily silicified margin of the valve and the heavily silicified axial area. Because of these unique features, we propose the formation of a new genus in the Naviculaceae for N. krasskei, Microcostatus gen. nov.