Contribution to the knowledge of the genus Neohypodiscus (Ascomycota) in South America: first records of N. cerebrinus and N. rickii from northwestern Argentina
Background and aims: Neohypodiscus was established to replace Hypodiscus, a later homonym of an angiosperm. The genus is restricted to the Americas and is characterized by massive stromata with non-amyloid unitunicate asci and brown septate ascospores. Although currently classified within the order...
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| Autores principales: | , |
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| Formato: | Artículo revista |
| Lenguaje: | Inglés |
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Sociedad Argentina de Botánica
2025
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| Acceso en línea: | https://revistas.unc.edu.ar/index.php/BSAB/article/view/49726 |
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| Sumario: | Background and aims: Neohypodiscus was established to replace Hypodiscus, a later homonym of an angiosperm. The genus is restricted to the Americas and is characterized by massive stromata with non-amyloid unitunicate asci and brown septate ascospores. Although currently classified within the order Boliniales, its taxonomic position within the Sordariomycetes remains uncertain. In this article, we contribute to the understanding of Neohypodiscus in the context of the Southern Cone of South America.
M&M: Specimens were collected from both protected natural areas in the northwest of the country and urban areas. The study was conducted using conventional mycological techniques and both light and epifluorescence microscopy.
Results: Neohypodiscus cerebrinus and N. rickii are described and thoroughly illustrated with photographic images. Taxonomic notes and observations on host preference are provided. In addition, preliminary observations on the interaction between a fungicolous fungus and the stromata of N. rickii are presented.
Conclusions: This study expands the known distribution of Neohypodiscus species in the Southern Cone of South America. In particular, N. cerebrinus —although widespread across the Americas— appears to be rare within Las Yungas, where it may exhibit host specificity for Ocotea porphyria. In contrast, N. rickii occurs on diverse native and exotic plant species, and its stromata are frequently colonized by a fungicolous basidiomycete. The findings suggest a dual ecological role for Neohypodiscus as both a saprobe and a mycohost |
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