''Cyptotrama pauper'' also known as ''Cyptotrama pauperum'' is a species of

mushroom A mushroom or toadstool is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground, on soil, or on its food source. ''Toadstool'' generally denotes one poisonous to humans. The standard for the name "mushroom" is t ...

producing

fungus A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from th ...

in the family Agaricaceae.

Taxonomy

It was described in 1989 by the German mycologist

Rolf Singer Rolf Singer (June 23, 1906 – January 18, 1994) was a Germany, German-born mycologist and one of the most important Taxonomy (biology), taxonomists of gilled mushrooms (agarics) in the 20th century. After receiving his Ph.D. at the University ...

who classified it as ''Cyptotrama pauperum '' however this is now regarded as an orthographic variant and the species is now called ''Cyptotrama pauper.''

Description

''Cyptotrama pauper'' is a small red-pink mushroom with thin and fragile white or pale flesh. Cap: 0.8-3.7 cm wide and convex to flat or with upturned edges. The surface is red but fades to pink with age, it is smooth or with finely appressed or fibrillose scales. It is not hygrophanous or viscid. Gills: Adnate, crowded and white. Stem: 1.6-3.8 cm long and 1–2.5mm thick. The surface is pink and smooth but pale or white and silky towards the apex and it runs equally or with a slight taper towards the top. The interior is a hollow tube (tubulose) and the base has silky white mycelium present. Spores: Fusoid or oblong, hyaline, non-amyloid. 9.5-12 x 4.7-5.3 μm. Basidia: 37-40 x 8-8.5 μm. Four spored. Smell: Indistinct.

Habitat and distribution

The specimens studied by Singer were found growing on the fallen trunk of a

Dicotyledon The dicotyledons, also known as dicots (or, more rarely, dicotyls), are one of the two groups into which all the flowering plants (angiosperms) were formerly divided. The name refers to one of the typical characteristics of the group: namely, t ...

ous tree in the tropical forest on the road between

Manaus Manaus () is the capital and largest city of the Brazilian state of Amazonas. It is the seventh-largest city in Brazil, with an estimated 2020 population of 2,219,580 distributed over a land area of about . Located at the east center of the s ...

and

Itacoatiara Itacoatiara is one of the 48 official neighborhoods into which the city of Niterói, Rio de Janeiro in Brazil is divided. Beach Itacoatiara beach is located about 30 minutes east of downtown Niterói by car, or one hour by bus. Itacoatiar ...

, Brazil.

Similar species

Singer states that the species is related to ''

Cyptotrama hygrocyboides ''Cyptotrama'' is a genus of mushrooms in the family Physalacriaceae. Species *''Cyptotrama asprata'' (Berk.) Redhead & Ginns (1980) *'' Cyptotrama chrysopepla'' (Berk. & M.A. Curtis) Singer (1973) *'' Cyptotrama costesii'' (Speg.) Singer (1973) ...

'' but is distinguished by the lack of pleurocystidia''.''

References

{{Taxonbar, from=Q107611481 Agaricaceae Fungi described in 1989 Fungi of South America Taxa named by Rolf Singer Fungus species