Mycena intersecta

*Mycena intersecta*
saprotrophic
Mycena intersecta saprotrophic
	Edibility is unknown

Mycena intersecta
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Agaricales
Family:	Mycenaceae
Genus:	Mycena
Species:	M. intersecta
Binomial name
	Mycena intersecta; Har.Takah. (2007)
	Known only from Kanagawa, Japan

Mycena intersecta is a species of

dextrinoid flesh (staining reddish to reddish-brown in Melzer's reagent), and the absence of clamp connections. The edibility

of the mushroom is unknown.

Taxonomy and naming

The mushroom was first collected by Japanese mycologist Haruki Takahashi in 1999, and published as a new species (along with seven other Japanese Mycenas) in a 2007 publication. The

specific epithet is from the Latin word intersecta or "intersected", and refers to the intervenose gills. Its Japanese name is Oriibu-ashinagatake (オリーブアシナガタケ).^[2]

According to Takahashi, the fungus is best

Maas Geesteranus.^[2]^[3]

The cap of M. intersecta is initially conical to convex to bell-shaped, eventually reaching 8 to 12 mm (0.31 to 0.47 in) in diameter. When it is moist, it is partly translucent, so that the outlines of the gills underneath the cap can be seen. The cap is somewhat hygrophanous, and dry. Its surface is initially minutely pruinose (as if covered with a fine white powder), but this effect soon sloughs off, leaving the surface smooth. The cap color is initially olive-brown to yellowish-brown, then somewhat paler from the margin. The white flesh is up to 0.7 mm thick, and lacks any distinctive taste and odor. The slender stem is 50 to 80 mm (2.0 to 3.1 in) long by 0.7 to 1.2 mm (0.03 to 0.05 in) thick, cylindrical, and hollow. Its surface is dry, and colored pale olive-brown near the top, becoming olive-brown downward. Like the cap, it is at first pruinose, but smooths out in age. The base of the stem is covered with coarse white hairs. The gills are adnate to subdecurrent (running slightly down the length of the stem), and distantly spaced, with 16–19 gills reaching the stem. The gills are up to 1.5 mm broad, thin, somewhat intervenose, and whitish, with edges that are the same color as the gill faces. Takahashi's description does not include any discussion of the mushroom's edibility.^[2]

Microscopic characteristics

The

dextrinoid. The cap cuticle is made of parallel, bent-over hyphae that are 2–6 μm wide, cylindrical, and densely covered with warty or finger-like thin-walled diverticulae that are colorless and inamyloid. The layer of hyphae underneath the cap cuticle are parallel, olive-brown, and weakly dextrinoid, with short and inflated cells up to 22 μm wide. The stem cuticle is made of parallel, bent-over hyphae that are 2–4 μm wide, cylindrical, smooth to sparsely diverticulate. These hyphae curve outward to form club-shaped or irregularly shaped caulocystidia (cystidia on the stem) that are olive-brown, inamyloid, and thin-walled. They measure 13–29 by 3–7 μm, and are broadly club-shaped to irregularly shaped, and often have one to three knob-like excrescences. The stem tissue is made of longitudinally running, cylindrical hyphae that are 5–12 μm wide, smooth, colorless, and have a weakly dextrinoid in Melzer's reagent. Clamp connections are absent in all tissues of M. intersecta.^[2]

Similar species

The European species Mycena viridimarginata is somewhat similar to M. intersecta in appearance, but may be distinguished by its greenish-edged gills, cheilocystidia with abruptly tapering points, and clamp connections.^[2]

Habitat and distribution

Mycena intersecta is known only from

Quercus myrsinaefolia and Q. serrata.^[2]

References

^ "Index Fungorum – Names Record". CAB International. Retrieved 2010-01-01.
^
S2CID 85093542
.

^ Maas Geesteranus RA. "Studies in Mycenas 15. A tentative subdivision of the genus Mycena in the northern Hemisphere". Persoonia. 11: 93–120.

External links

The Agaricales in Southwestern Islands of Japan Images of the holotype specimen

[Fungorum-1] "Index Fungorum – Names Record". CAB International. Retrieved 2010-01-01.

[Takahaski2007-2] 
S2CID 85093542
.

[MaasGeesteranus1980-3] Maas Geesteranus RA. "Studies in Mycenas 15. A tentative subdivision of the genus Mycena in the northern Hemisphere". Persoonia. 11: 93–120.

[2]

[3]