Ascomata of a Metarhizium species were collected from Tochigi Prefecture, Japan. The ascomata were similar to M. kalasinense in its host preference for elaterids, olive-green clavate stromata, and obliquely immersed perithecia, but the asci and ascospores were significantly shorter in length than those of the latter species. Furthermore, phylogenetic analyses based on the internal transcribed spacer region of nuclear ribosomal DNA and the elongation factor 1-alpha gene showed that the Japanese species was phylogenetically distinctive in the M. anisopliae lineage, including M. kalasinense. Accordingly, we describe a new species, M. brachyspermum. Isolates of this species produced olive-green conidial masses on the surface of the colony. Also, hyphal anastomoses between two metulae were often observed on conidiophores.

一的Ascomata绿僵种来自枥木县，日本收集。该子囊在其寄主偏爱埃德勒德，橄榄绿色的棒状基质和倾斜浸没的皮膜上的宿主寄主上与kalasinense相似，但其子囊和子囊的长度明显短于后者。此外，基于核糖体DNA的内部转录间隔区和延伸因子1-alpha基因的系统发育分析表明，日本物种在包括M. kalasinense在内的M. anisopliae谱系中在系统发育上具有独特性。因此，我们描述了一个新物种，M。brachyspermum。该物种的分离物在菌落表面产生了橄榄绿色的分生孢子团。另外，在分生孢子体上经常观察到两个小舌之间的菌丝吻合。