| Nigrohydnum | |
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| Genus: | Nigrohydnum Ryvarden (1987) |
| Type species | |
| Nigrohydnum nigrum Ryvarden (1987) | |
Nigrohydnum is a fungal genus in the order Polyporales. It contain a single species, Nigrohydnum nigrum, a rare toothed polypore known from only a few collections in Brazil.
Description
The fruit body of the fungus is characterized by its purplish-black, semicircular caps with spines on the cap underside. The caps, which measure up to 3 cm (1.2 in) wide by 5 cm (2 in) broad and 1 cm (0.4 in) thick at the base, become tough and woody when dried. The spines on the cap underside are up to 3 mm long, and are densely packed, numbering about 1–3 per millimetre. Nigrohydnum has a dimitic hyphal system, containing both generative hyphae with clamp connections and skeletal hyphae. The spores of Nigrohydnum nigrum are cylindrical, thin-walled, hyaline, and measure 4.5–2 μm. They are inamyloid.[1]
Distribution
The type of the fungus was collected in Serra do Aracá State Park, in the state of Amazonas, Brazil.[1] It was later reported from Paraná.[2] After an old voucher specimen was discovered in a herbarium and identified to be N. nigrum, the geographic distribution was extended to the Atlantic rainforest of Porto Alegre, Rio Grande do Sul state, in Southern Brazil.[3]
References
- 1 2 Ryvarden, L. (1987). "New and noteworthy polypores from tropical America". Mycotaxon. 28 (2): 525–541 (see p. 532).
- ↑ Ryvarden, Leif; de Meijer, A.A.R. (2002). "Studies in neotropical polypores 14. New species from the state of Paraná, Brazil". Synopsis Fungorum. 15: 34–69.
- ↑ Robledo, Gerardo; Gugliotta, Adriana de Mello (2013). "New distribution record of Nigrohydnum nigrum Ryvarden (Polyporales: Basidiomycota) in the Atlantic forest". Check List. 9 (1): 97–98. doi:10.15560/9.1.97. hdl:11336/81968.