Species of Fusarium are important phytopathogens, saprobes, and endophytes around the world. Some species can affect plant health and cause yield loss of economic plants. Fusarium species are widely distributed in China, and many species were found from different plant hosts. The Fusariumincarnatum-equiseti species complex (FIESC) is one of the most significant species complexes within the genus. Based on morphological and three-gene (cal, rpb2, and tef1) phylogenetic analyses, two new species are in the Incarnatum clade, and two new host records are identified and described, viz. Fusariumfici sp. nov., Fusariumxylosmatis sp. nov., Fusariumfecundum, and Fusariumweifangense.

Keywords: Fusariumincarnatum-equiseti species complex; multigene phylogeny; new taxa.

Congcong Ai, Qiyun Liu, Yaling Wang, Zhaoxue Zhang, Duhua Li, Yun Geng, Xiuguo Zhang, Jiwen Xia.

镰刀菌（Fusarium）种类是世界上重要的植物病原菌、腐生菌和内生菌。有些物种会影响植物健康并导致经济作物产量下降。Fusarium 物种在中国广泛分布，许多物种来自不同的植物宿主。Fusarium incarnatum-equiseti 种复合群（FIESC）是属内的最重要复合群之一。基于形态学和三种基因（cal, rpb2, 和 tef1）的系统发育分析，在肉红镰刀菌谱系中发现了两个新物种，并且确定并描述了两个新的寄主记录，即Fusarium ficii sp. nov.，Fusarium xylosmatis sp. nov.，Fusarium fecundum 和 Fusarium weifangense。

关键词： 麟毛镰刀菌种复合群；多基因系统发育；新分类单元。

Ai Congcong, Liu Qiyun, Wang Yaling, Zhang Zhaoxue, Li Duhua, Geng Yun, Zhang Xiuguo, Xia Jiwen.