在一个猛蚁Ponera sp.蚁巢的罹病兵蚁上,采集和分离到枝多头霉Polycephalomyces ramosus XCH-ant-8、XCH-ant-L3和XCH-ant-706。枝多头霉P.Ramosus XCH-ant-8及XCH-ant-L3具类刺束梗孢Akanthomyces-like共无性型;P.Ramosus XCH-ant-706则具有类顶头孢Acremonium-like共无性型。3个枝多头霉标本具有明显共无性型(synanamorph)的多型现象。在蚁巢采集的标本中发现1个新的隐存种猛蚁多头霉Polycephalomyces ponerae。此新种兼具类刺束梗孢Akanthomyces-like和类顶头孢Acremonium-like两个类型的共无性型。此外,在采集的标本中还分离到一种层束梗孢Hymenostilbe sp.XCH-ant-03和一种拟多头束霉T ilachlidium sp.XCH-ant-710。基于r DNA ITS序列分子系统发育树和拆分网络(splits network)分析研究,支持基于形态学特征鉴定猛蚁多头霉P.ponerae作为多头霉属中的一新成员,同时也支持蚁巢中枝多头霉P.ramosus形态学上的差异是共无性型多型现象。
Some soldier ant specimens infected by synnematous fungi with different synnemata were collected from an ant nest of Ponera sp. These specimens were Polycephalomyces ramosus XCH-ant-706, XCH-ant-L3 and XCH-ant-8. Both XCH-ant-706 and XCH-ant-L3 have an Akanthomyces-like synanamorph, and XCH-ant-8 has an Acremonium-like one. These three specimens obviously possessed synanamorphic polymorphism. A new cryptic species, Polycephalomyces ponerae was found. The new species had both types of synanamorph, Akanthomyces-like and Acremonium-like one. In addition, Hymenostilbe sp. XCH-ant-03 and T ilachlidium sp. XCH-ant-710 were isolated from the collections. Morphological identification, molecular phylogenetic tree and splits network analysis of sequences of r DNA ITS-5.8S supported that P. ponerae was a new member in the genus Polycephalomyces. The results also supported that morphological divergences of P. ramosus in the ant nest might be reflection of synanamorphic polymorphism.