Abstract
We used phylogenetic analyses based on ribosomal internal transcribed spacer (ITS) and beta-tubulin (TUB) sequences and determined that the correct name of ‘Verticillium hahajimaense’ was Cylindrocladiella hahajimaensis. A closest relative could not be determined, since C. hahajimaensis clustered within the C. infestans species complex, a poorly resolved group of taxa. Cylindrocladiella hahajimaensis differed from all other members of the C. infestans species complex by at least 18 substitutions at the two loci. Morphological characters supported the placement within Cylindrocladiella. In addition to the verticillate conidiophores mentioned in the type description, we found evidence for the presence of penicillate conidiophores. Other differences to the type description included the presence of yellow to brown-pigmented hyphae, and the hyaline instead of pigmented chlamydospores.
Highlights
The genus Cylindrocladiella comprises a small, monophyletic group of fungi in the Nectriaceae related to Cylindrocladium (Schoch et al 2000)
Cylindrocladiella hahajimaensis grouped in a well supported, but poorly resolved clade together with C. lageniformis, C. infestans, Nectricladiella infestans, C. viticola and a Cylindrocladiella sp. (Fig. 1)
C. hahajimaensis was most similar to N. infestans from which it differed by 18 substitutions in the 950 bp, combined internal transcribed spacer (ITS) and TUB dataset
Summary
The genus Cylindrocladiella comprises a small, monophyletic group of fungi in the Nectriaceae related to Cylindrocladium (Schoch et al 2000). Cylindrocladium and Cylindrocladiella are morphologically similar, they form two different synanamorphs that resemble Penicillium and Verticillium in terms of branching pattern and phialide arrangement, but may bear long hyphal projections with swollen tips that are referred to Copyright P. Differences between Cylindrocladiella and Cylindrocladium include aspects of conidiophore branching, filament morphology, appearance in culture, and conidia morphology and size (Boesewinkel 1982). Cylindrocladiella comprises ten species that have been isolated from soil as well as plant tissues where they may act as pathogens (van Coller et al 2005; Zhang and Chi 1996)
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