Scytalidium cuboideum (Sacc. & Ellis) Sigler & Kang

Tong, Shuo-Qiu, Yang, Yi-Fan, Li, Peng, Wu, Yong-Jun, Sun, Bing-Da & Zhang, Zhi-Yuan, 2025, Phylogenetic assessment and taxonomic revision of Scytalidium (Helotiales, Leotiomycetes), IMA Fungus 16, pp. e 164608-e 164608 : e164608-

publication ID	https://doi.org/10.3897/imafungus.16.164608
DOI	https://doi.org/10.5281/zenodo.17353084
persistent identifier	https://treatment.plazi.org/id/96AA98A3-2005-5929-8F46-03393ABC093C
treatment provided by	by Pensoft
scientific name	Scytalidium cuboideum (Sacc. & Ellis) Sigler & Kang
status

Treatment

7. Scytalidium cuboideum (Sacc. & Ellis) Sigler & Kang View in CoL , Mycologia 102 (5): 1179 (2010)

Geotrichum microsporum Smith, Trans. Br. Mycol. Soc. View in CoL 45: 388. 1962.

Basionym.

Oospora cuboidea Sacc. & Ellis , Michelia 2 (8): 576. 1882.

Synonym.

Arthrographis cuboidea (Sacc. & Ellis) Sigler View in CoL , Mycotaxon 4: 363. 1976.

Other synonyms and a detailed description are provided in Sigler and Carmichael (1976).

Description and illustration.

Kang et al. (2010).

Notes.

Scytalidium cuboideum is phylogenetically closely related to S. sphaerosporum and S. chlamydosporum (Figs 1 View Figure 1 , 2 View Figure 2 ). The distinctions between S. cuboideum and S. chlamydosporum are provided in the notes for S. chlamydosporum . Morphologically, S. cuboideum differs from S. sphaerosporum by its unknown sexual morph ( Kang et al. 2010). Furthermore, based on a pairwise comparison of ITS, S. cuboideum ( Isotype UAMH 676 ) differs from S. sphaerosporum (ex-type ATCC 34392 ) by 13.2 % (73 / 554 bp, 23 gaps) in the ITS.

Scytalidium cuboideum is a soft rot fungus capable of causing pink or blue spalting in wood, commonly found on both hardwoods and softwoods such as oak ( Quercus spp.) ( Robinson et al. 2007). It has a global distribution and has been isolated from various regions, including the United States, South Africa, Japan, and Bhutan ( Robinson et al. 2007). Scytalidium cuboideum produces a red pigment known as draconin red, which exhibits excellent lightfastness, UV resistance, and colorfastness, showing strong potential for applications in textiles, wood coatings, and paper dyeing ( Robinson et al. 2014; Gutierrez et al. 2019; Hinsch et al. 2022; Diplock et al. 2023). Notably, although not a common pathogen, it has been isolated from respiratory samples (such as bronchial wash and lung tissue), can grow at 37 ° C, and is susceptible to several antifungal agents (e. g., posaconazole, voriconazole) but resistant to echinocandins and terbinafine, indicating potential pathogenicity ( Giraldo et al. 2013; Sy-Cordero et al. 2015).