Scytalidium ganodermophthorum Kang, Sigler, Lee & Yun

publication ID	https://doi.org/10.3897/imafungus.16.164608
DOI	https://doi.org/10.5281/zenodo.17353086
persistent identifier	https://treatment.plazi.org/id/A7CBDBF8-B616-5E5E-91C9-0E40481DC7C1
treatment provided by	by Pensoft
scientific name	Scytalidium ganodermophthorum Kang, Sigler, Lee & Yun
status

Synonym.

Description and illustration.

Kang et al. (2010).

Notes.

Scytalidium ganodermophthorum is phylogenetically closely related to S. synnematicum (Figs 1 View Figure 1 , 2 View Figure 2 ). Morphologically, S. ganodermophthorum differs from S. synnematicum by its production of a sexual morph, arthroconidia, and not producing conidiomata or synnemata ( Kang et al. 2010; Crous et al. 2023). Furthermore, based on a pairwise comparison of ITS, S. ganodermophthorum (ex-type UAMH 10320 ) differs from S. synnematicum (ex-type CCMB 207 / 13) by 9.6 % (50 / 520 bp, 16 gaps) in the ITS. Goh et al. (2015) established S. parasiticum based on morphological characteristics and phylogenetic analyses. However, in this study, S. parasiticum (ex-type AAX 0113 ) and S. ganodermophthorum ( UAMH 10320 , H 123, and TPML 97003 ) clustered in a single subclade with high supported value (100 / 1) (Figs 1 View Figure 1 , 2 View Figure 2 ). In a comparison of ITS, S. parasiticum ( AAX 0113 ) exhibited 99.8 % (515 / 516 bp, no gap) similarity to S. ganodermophthorum (ex-type UAMH 10320 ). Moreover, the morphological characteristics between S. parasiticum and S. ganodermophthorum are minor; therefore, we treat S. parasiticum as a synonym of S. ganodermophthorum .

Scytalidium ganodermophthorum was first discovered in Korea as a pathogenic fungus causing yellow rot in cultivated Ganoderma lucidum ( Kang et al. 2010) , on which it behaves as an obligate or facultative parasite. While S. ganodermophthorum is a pathogen of G. lucidum , its synonym S. parasiticum has been shown to exhibit antagonistic effects against another Ganoderma species, the oil palm pathogen G. boninense , demonstrating its potential as a biocontrol agent ( Goh et al. 2016).