A new species, Encyonopsis indonesica, is described from the ancient lake Matano, Sulawesi island, Indonesia. The morphology of this species was studied by means of light and scanning electron microscopy. E. indonesica has a remarkable valve ultrastructure. The valve surface is ornamented with numerous longitudinal siliceous ribs and siliceous verrucae. Valve face delineated from the mantle by a thickened marginal ridge. Raised sterna border the raphe branches. Raphe is distinctly undulate with distal ends hooked strongly to the ventral side. The only similar species to E. indonesica is Amphora dissimilis described from New Caledonia. Comparison of both taxa is given and A. dissimilis is transferred to Encyonopsis. The taxonomic placement of both taxa is evaluated, and the phenomenon of external siliceous ornamentation is discussed.

中文翻译：

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印尼莲 十一月 （芽孢杆菌，Cy藻），一种来自古老的Matano湖（印度尼西亚苏拉威西）的新硅藻

从印度尼西亚苏拉威西岛的古老湖马塔诺（Matano）中发现了一种新种，印度尼西亚的Encyonopsis indonesica。通过光和扫描电子显微镜研究了该物种的形态。印尼大肠埃希氏菌具有卓越的瓣膜超微结构。阀表面装饰有许多纵向硅质肋骨和硅质疣。阀面由加厚的边缘脊从地幔划出。凸起的胸骨接缝拉菲分支。Raphe明显起伏，远端牢固地钩在腹侧。与印尼大肠埃希菌的唯一相似物种是新喀里多尼亚描述的双耳安菲拉。给出了两种分类单位的比较，并将拟南芥转移到了灰翅目。评价了两个分类单元的分类位置，并讨论了外部硅质装饰的现象。