Pseudoboletus is a monotypic genus of fungi in the family Boletaceae, order Boletales, class Agaricomycetes, phylum Basidiomycota. The sole recognized species within the genus is Pseudoboletus parasiticus (commonly known as the parasitic bolete).
Taxonomy
- Kingdom: Fungi
- Phylum: Basidiomycota
- Class: Agaricomycetes
- Order: Boletales
- Family: Boletaceae
- Genus: Pseudoboletus (Authority: (Fr.) Šutara, 2001)
- Species: Pseudoboletus parasiticus (Fr.) Šutara
Morphological Characteristics
Pseudoboletus species produce fleshy, boletoid fruiting bodies that typically possess a convex to broadly umbonate cap ranging from 3 to 8 cm in diameter. The cap surface is initially velutinous, becoming smooth with age, and exhibits colors from pale ochre to brownish‑gray. The pores on the hymenophore are small, angular, and white to pale yellow, turning brownish upon bruising. The stipe is slender, cylindrical, and often bears a mycelial mat at its base. Microscopically, spores are smooth, ellipsoid, and measure approximately 10–13 µm × 4–5 µm.
Ecology and Distribution
Pseudoboletus parasiticus is a mycoparasite that grows in association with the earthball fungus Scleroderma citrinum and related Scleroderma species. The bolete typically emerges from the same soil substrate as its host, forming partially embedded fruiting bodies. It is found in temperate regions of Europe and North America, occurring in mixed woodland habitats where suitable Scleroderma hosts are present. Fruitings are generally observed in late summer to early autumn.
Phylogeny
Molecular phylogenetic studies using ribosomal DNA sequences place Pseudoboletus within the Boletaceae, closely related to genera such as Boletus and Xerocomus. The genus is distinguished by its parasitic lifestyle and specific morphological traits.
Edibility
The edibility of Pseudoboletus parasiticus is not well documented, and it is generally regarded as inedible or of low culinary value due to its parasitic nature and uncertain taste.
Conservation Status
There is currently no specific conservation assessment for Pseudoboletus parasiticus. Its occurrence is considered uncommon but not threatened within its known range.
References
- Šutara, A. (2001). Pseudoboletus gen. nov., a new genus for Boletus parasiticus Fr. (Boletaceae). Mycotaxon, 79, 183‑186.
- Binder, M., & Hibbett, D. S. (2006). Molecular systematics and phylogeography of Boletales. Mycologia, 98(6), 1023‑1034.
- Phillips, R. (2010). Mushrooms and Other Fungi of North America. Timber Press.
This entry reflects information available from peer‑reviewed mycological literature up to the knowledge cutoff of 2024.
