Sporothrix villosa
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Ordo: Ophiostomatales
Familia: Ophiostomataceae
Genus: Sporothrix
Name
Sporothrix villosa R.L. Chang & X.Y. Zhang sp. nov. – Wikispecies link – Pensoft Profile
Holotype
China. Shandong province: Zhujiajuan village, Huancui District, Weihai City, from Cryphalus piceae on Pinus thunbergii, 10 Oct. 2019, R. L. Chang (HMAS 249926-holotype; SNM188 = CGMCC 3.20264– ex-holotype culture).
Additional cultures checked
China. Shandong province: Zhujiajuan village, Huancui District, Weihai City, from Cryphalus piceae on Pinus thunbergii, 10 Oct. 2019, R. L. Chang (SNM162); China. Shandong province: Zhujiajuan village, Huancui District, Weihai City, from Cryphalus piceae on Pinus thunbergii, 10 Oct. 2019, R. L. Chang (SNM182).
Etymology
The name refers to the velvety colony morphology of this fungus on MEA.
Diagnosis
Sporothrix villosa differ from S. abietina by the production of smaller conidia and slow growth rate on MEA at 35 °C.
Description
Sexual morph is unknown. Asexual state sporothrix-like: the conidiophores directly arising from the vegetative hyphae, measuring (3.2–) 6.8–23.8 (–53.6) μm × (0.5–) 0.8–1.3 (–1.5) μm (Fig. 13b, d and e); conidia hyaline, smooth, unicellular oblong to ovoid, with rounded ends, measuring (1.2–) 1.8–2.6 (–4.1) × (0.7–) 0.8–1.1 (–1.4) μm (Fig. 13c).
Culture characteristics
The colonies are white in color on MEA. Mycelia were submerged in the agar. The optimal temperature for growth is 25 °C, reaching 21.1 mm diam in 10 d. Growth is extremely slow at 35°C 3 mm diam in 10 days. No growth was observed at 5 °C.
Distribution
Currently known from Weihai City in Shandong Province, China.
Note
Sporothrix villosa is closely related to two fungal isolates recovered from China in CAL tree, and another two isolates recovered from the USA in ITS and BT trees, which were previously identified as S. cf. abietina. This taxon is phylogenetically distinct from all other species in the S. gossypina species complex (Figs 6–8). Six et al. (2011)[1] classified all the isolates from China, Canada, the USA, New Zealand, Korea, and South Africa that were close to the ex-type cultures on the BT tree as S. abietina. However, these selected isolates did not form a monophyletic clade. Later, in the phylogenies using BT and CAL gene-regions, these isolates of S. abietina did not cluster with the ex-type isolates of S. abietina. Therefore, these isolates were provisionally identified as S. cf. abietina (Romón et al. 2014a[2]; Romón et al. 2014b[3]). Our phylogenetic analyses indicated that isolates classified as S. abietina (Six et al. 2011[1]) plausibly included several phylogenetic distinct species. In this study, Sporothrix villosa recovered produced a sporothrix-like asexual morph similar to other species in the complex. Furthermore, the conidia of S. villosa (Fig. 13c) are smaller than those of S. abietina (1.2–4.1 × 0.7–1.4 vs. 4–7.5 × 1–2 μm) (Marmolejo and Butin 1990[4]). Unlike S. abietina, S. villosa can grow slowly at 35 °C.
Original Description
- Chang, R; Zhang, X; Si, H; Zhao, G; Yuan, X; Liu, T; Bose, T; Dai, M; 2021: Ophiostomatoid species associated with pine trees (Pinus spp.) infested by Cryphalus piceae from eastern China, including five new species MycoKeys, 83: 181-208. doi
Images
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Other References
- ↑ 1.0 1.1 Six D, Beer Z, Duong T, Carroll A, Wingfield M (2011) Fungal associates of the lodgepole pine beetle, Dendroctonus murrayanae.Antonie van Leeuwenhoek100: 231–244. https://doi.org/10.1007/s10482-011-9582-1
- ↑ Romón P, De Beer Z, Fernández M, Diez J, Wingfield B, Wingfield M (2014a) Ophiostomatoid fungi including two new fungal species associated with pine root-feeding beetles in northern Spain.Antonie van Leeuwenhoek106: 1167–1184. https://doi.org/10.1007/s10482-014-0286-1
- ↑ Romón P, De Beer Z, Zhou X, Duong T, Wingfield B, Wingfield M (2014b) Multigene phylogenies of Ophiostomataceae associated with Monterey pine bark beetles in Spain reveal three new fungal species.Mycologia106: 119–132. https://doi.org/10.3852/13-073
- ↑ Marmolejo J, Butin H (1990) New conifer-inhabiting species of Ophiostoma and Ceratocystiopsis (Ascomycetes, Microascales) from Mexico.Sydowia42: 193–199.
