Environmental sampling in Poland and the United States and phylogenetic analyses based on 567 sequences of four genes (155 sequences of nuclear SSU rDNA, 139 of nuclear LSU rDNA, 135 of plastid-encoded SSU rDNA, and 138 of plastid-encoded LSU rDNA) resulted in description of the new genus Flexiglena, which has been erected by accommodating Euglena variabilis, and enriching the Discoplastis and Euglenaformis genera with five new species. Four of them have joined the Discoplastis genus, currently consisting of six representatives: D. adunca, D. angusta (=Euglena angusta), D. constricta (=Lepocinclis constricta), D. excavata (=E. excavata), D. gasterosteus (=E. gasterosteus), and D. spathirhyncha. One of them has enriched the Euglenaformis genus, currently represented by two species: Euf. chlorophoenicea (= E. chlorophoenicea) and Euf. proxima. For most studied species, the diagnostic descriptions have been emended and epitypes were designated. Furthermore, the emending of Discoplastis and Euglenaformis diagnoses was performed.

中文翻译：

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Flexiglena 基因的描述。十一月 Discoplastis 和 Euglenaformis (Euglenida) 的新成员

波兰和美国的环境采样以及基于 4 个基因的 567 个序列（155 个核 SSU​​ rDNA、139 个核 LSU rDNA、135 个质体编码的 SSU rDNA 和 138 个质体编码的 LSU rDNA）的系统发育分析结果在新属的描述Flexiglena，已竖立通过适应眼虫栎，丰富的Discoplastis和Euglenaformis属五个新品种。其中四个加入了Discoplastis属，目前由六个代表组成：D. adunca、D. angusta（= Euglena angusta）、D. constricta（= Lepocinclis constricta)、D. excavata (= E. excavata ) 、D. gasterosteus (= E. gasterosteus ) 和D. spathirhyncha。其中之一丰富了眼虫属，目前由两个物种代表：Euf。chlorophonicea (= E. chlorophonicea ) 和Euf。比邻点。对于大多数研究的物种，已修改诊断描述并指定了表型。此外，的emending Discoplastis和Euglenaformis进行诊断。