Strobilomyces foveatus

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Strobilomyces foveatus
Scientific classification Red Pencil Icon.png
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Boletales
Family: Boletaceae
Genus: Strobilomyces
Species:
S. foveatus
Binomial name
Strobilomyces foveatus
Strobilomyces foveatus
Information icon.svg
Pores icon.pngpores on hymenium
Convex cap icon.svg cap is convex
Adnate gills icon2.svg hymenium is adnate
Bare stipe icon.svg stipe is bare
Transparent spore print icon.svg
Transparent spore print icon.svg
spore print is black to brown
Mycorrhizal fungus.svgecology is mycorrhizal
Mycomorphbox Question.pngedibility: unknown

Strobilomyces foveatus is a little-known species of fungus in the family Boletaceae. It was first reported by mycologist E.J.H. Corner in 1972, from specimens he collected in Malaysia in 1959, and has since been found in Australia. Fruit bodies are characterized by the small dark brown to black conical scales covering the cap, and the net-like pattern of ridges on the upper stem. The roughly spherical spores measure about eight micrometres, and are densely covered with slender conical spines. The edibility of this species is unknown.

Contents

Taxonomy and classification

Strobilomyces foveatus was first described scientifically by mycologist E.J.H. Corner in 1972, from specimens collected in Sarawak, Malaysia in 1959. [1] It was one of several new Strobilomyces species he described in his monograph of Malaysian Boletaceae—the others were S. annulatus , S. mirandus , and S. mollis . [2]

The fungus is classified in the section Strobilomyces of the genus Strobilomyces . Species in this section are characterized by having spores that may be either smooth or with short spines or warts, ridges or reticulations. The ornamentation is reduced or absent in the suprahilar region (a depressed area near the hilar appendage). [3] The specific epithet foveatus is derived from the Latin adjective foveola, referring to a surface with pits or depressions. [4]

Description

The caps of the fruit bodies are between 7 and 10 cm (2.8 and 3.9 in) wide, with a convex shape. The cap surface is covered with dark brown to black erect scales between 1.5–3 by 1.5–2.5 mm. The stem is up to 12 cm (4.7 in) long; it is 1.2 cm (0.5 in) thick at the top, and 1.5 cm (0.6 in) thick at the bottom. The surface of the upper stem is strongly reticulate (covered with a network-like pattern) with individual meshes about 2–4 mm wide and 1–2 mm deep. The pores on the underside of the cap are between 0.5 and 1 mm wide, dirty white then gray, and they bruise a brownish-black color. The tubes which make up the pores are up to 1.2 cm (0.47 in) long. The flesh is thick and initially white, but will stain a brownish-black after exposure to the air. [1]

The spores are 8–10 by 6.3–8.3  μm, and densely covered with slender conical spines about 0.5 μm tall. The abundant pleurocystidia (large sterile cells found on gill faces) are thin-walled, measuring up to 90 μm long by 1–20 μm wide, and ventricose (with a swelling on one side), with a narrow appendage up to 20 μm by 4–8 μm. The hyphae that make up the cap surface and the warts are branched, loosely interwoven, and sooty colored; the unclamped cells typically measure 17–45 by 9–26 μm. The surface of the stem is made of a compact mat of hyphae roughly 120 μm thick, that reduces to a sterile hymenium in the upper part of the stem. [1]

Corner notes that the species "may be identical" with Strobilomyces echinatus Beeli, an African species with spores that measure 9.5–13 by 6.3–8.3 μm. [1]

Habitat and distribution

The province of Sarawak (red) in Malaysia Sarawak state locator.svg
The province of Sarawak (red) in Malaysia

Corner collected specimens growing in humus on the forest floor, in Bako National Park ( 1°43′N110°28′E / 1.717°N 110.467°E / 1.717; 110.467 Coordinates: 1°43′N110°28′E / 1.717°N 110.467°E / 1.717; 110.467 ) in Sarawak, Malaysia, in northern Borneo. [1] It has also been collected from southern Queensland in Australia. [5] Although it is not known definitively for Strobilomyces foveatus, all Strobilomyces species are suspected to be mycorrhizal. [3]

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<i>Boletus rubroflammeus</i> Species of fungus

Boletus rubroflammeus is a species of bolete fungus in the family Boletaceae. First described from Michigan in 1971, it is found in the eastern United States and Mexico, where it grows in a mycorrhizal association with hardwood trees. The fruit bodies (mushrooms) of the fungus have caps that are deep red to purplish red, and dark red pores. The stem has coarse, dark red reticulations and a narrow yellow area at the top. All parts of the mushroom quickly stain blue when injured or cut. Lookalikes include Boletus flammans, a lighter-colored species that grows with conifers. Other similar species can be distinguished by differences in distribution, morphology, staining reaction, and microscopic characteristics. Boletus rubroflammeus mushrooms are poisonous, and can cause gastrointestinal distress if consumed.

<i>Boletus abruptibulbus</i> Species of fungus

Boletus abruptibulbus is a species of bolete mushroom in the family Boletaceae. Described as new to science in 2009, it is found only in the Gulf Coast of the Florida Panhandle, where it grows on the ground in coastal sand dunes, one of only three North American boletes known to favor this habitat. The fruit bodies have convex brownish caps up to 8 cm (3.1 in) in diameter, supported by solid yellowish to reddish stems measuring 3–5 cm (1.2–2.0 in) long by 10–15 mm (0.4–0.6 in) thick. The pores on the underside of the cap measure about 1–2 mm in diameter and are initially pale yellow before developing a greenish tinge in age. The mushroom's spores, about 20 micrometers long, are unusually long for a member of the Boletaceae. The stem base is bulbous, a diagnostic feature for which the species is named.

Strobilomyces glabriceps is a species of bolete fungus in the family Suillaceae found in China. It was described as new to science in 1948 by Wei-Fan Chiu. The type collection was made in Kunming in June, 1938.

References

  1. 1 2 3 4 5 Corner EJH. (1972). Boletus in Malaysia. Singapore: Botanic Gardens. p. 60. OCLC   668353.
  2. Commonwealth Mycological Institute (1973). "Index of Fungi". Index of Fungi. CAB International. 4 (6 (1971–1980)): 186. Retrieved 2010-09-15.
  3. 1 2 Singer R. (1986). The Agaricales in Modern Taxonomy (4th ed.). Koenigstein: Koeltz Scientific Books. p. 802. ISBN   3-87429-254-1.
  4. Headrick D, Gordh G. (2001). A Dictionary of Entomology. Wallingford, Oxon, UK: CABI Pub. p. 372. ISBN   0-85199-655-8 . Retrieved 2010-09-22.
  5. Halling R. "Strobilomyces foveatus Corner". Mushroom Observer. Retrieved 2010-09-15.