name | Amanita guzmanii |
name status | nomen acceptum |
author | Cifuentes, Villegas & Santiago |
english name | "Guzmán's Amanita" |
intro |
The following description is based on the original description by Santiago, Cifuentes, and Villegas (1984). |
cap |
The cap of A. guzmanii is 70 - 130 mm wide, convex then planar, whitish, with a striate margin. The cap is covered with easily removed powdery volva remains, that is orange-brown and discolors to a pale sordid orange-brown. There are also large, whitish, truncate, pyramidal to subcubic warts that are 3 - 5 mm high and leave a mark on the cap when removed. The flesh is 6 - 8 mm thick over the stem and white. |
gills |
The gills are free to lightly touching the stem, crowded, white to pale cream, rather broad, with an edge decorated with powder that is concolorous with the cap. The short gills are truncate and numerous. |
stem | The stem is 95 - 210 × 15 - 25 mm, cylindric or narrowing upwards, with a whitish ground which is densely covered with powdery scales, concolorous with the cap volva and discoloring like the cap powder. The bulb is subglobose. The ring is membranous but fragile, skirt-like, whitish on the upper surface, concolorous with the volva on the lower surface. |
odor/taste | The taste is slightly astringent. |
spores |
Herrera-Fonseca and Guzmán-Dávalos (2002) reexamined the type of A. guzmanii and found the spores dominantly broadly ellipsoid, occasionally subglobose and occasionally ellipsoid and apparently found them to be smaller than they were described originally. Unfortunately they did not publish the spore measurements that they made. The spore measurements from the original description are (8.4-) 9.7 - 14.2 × 6.7 - 8.2 (-9) µm. They were said to be ellipsoid to elongate and inamyloid. |
discussion |
This species is originally described from the states of Guerrero and Michoacan, in Mexico where it occurs solitarily or in groups in montane cloud forest (bosque mesófilo de montaña) of oak (Quercus) or of oak and pine (Quercus-Pinus). The original photograph of Amanita guzmanii, when color corrected using Photoshop, appears to have the same coloring as A. roseitincta (Murrill) Murrill. The difference in color stated in the original description of the present species may be in error. We understand that Dra. Laura Guzmán-Dávalos and student(s) are pursuing the issue of possible synonymy of A. guzmanii and A. roseitincta—R. E. Tulloss and L. Possiel |
brief editors | RET |
name | Amanita guzmanii | ||||||||
author | Cifuentes, Villegas R. & G. Santiago in G. Santiago, Cifuentes & Villegas R. 1984. Bol. Soc. Mex. Micol. 19: 100, figs. 5-7, 8-12. | ||||||||
name status | nomen acceptum | ||||||||
english name | "Guzmán's Amanita" | ||||||||
MycoBank nos. | 105034 | ||||||||
GenBank nos. |
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holotypes | FCME | ||||||||
intro |
The following text may make multiple use of each data field. The field may contain magenta text presenting data from a type study and/or revision of other original material cited in the protolog of the present taxon. Macroscopic descriptions in magenta are a combination of data from the protolog and additional observations made on the exiccata during revision of the cited original material. The same field may also contain black text, which is data from a revision of the present taxon (including non-type material and/or material not cited in the protolog). Paragraphs of black text will be labeled if further subdivision of this text is appropriate. Olive text indicates a specimen that has not been thoroughly examined (for example, for microscopic details) and marks other places in the text where data is missing or uncertain. The following material is derived from the protolog of the present species. | ||||||||
macrochemical tests |
none recorded. | ||||||||
pileus context | not described. | ||||||||
lamella trama | not described. | ||||||||
subhymenium | not described. | ||||||||
universal veil | double click in markup mode to edit. | ||||||||
partial veil | not desecribed. | ||||||||
lamella edge tissue | not described. | ||||||||
basidiospores | from protolog: [-/-/-] (8.4-) 9.7 - 14.2 × 6.7 - 8.2 (-9) μm, hyaline, smooth, thin-walled, inamylloid, ellpisoid; apiculus sublateral; contents not described; color in deposit not recorded. [Note: A sporograph is not generated because of the absence of a range for Q. This species is reportedly being re-examined (Guzmán-Davalos pers. comm.), and we are told that the spore data is going to differ from that provided in the protolog.—ed.] | ||||||||
ecology | from protolog: Solitary to subgregarious. At 1750 - 2700 m elev. In cloud forest dominated by Quercus or characterized by Pinus-Quercus mixture. | ||||||||
material examined | from protolog: MEXICO: GUERRERO—Mpio. Chichihualco, desviación a Atoyac, 16.viii.1980 J. Cifuentes s.n. (paratype, FCME 1484), 1.viii.1982 J. Cifuentes s.n. (paratype, FCME 10389), 6.viii.1982 Paz-Larralde s.n. (paratype, FCME 11597), s.d. J. Cifuentes 2007, (paratype, FCME 11831), 2009 (holotype, FCME 11830; isotype, XAL); Mpio. Tixtla de Guerrero, 2 km sobre desviación a El Durazno, carretera Chilpancingo-Tlapa, 6.viii.1981 Sierra López s.n. (paratype, FCME 1562), Suarez s.n. (paratype, FCME 1558). MICHOACAN—Mpio. Charo, Parq. Nac. Insurgente José Ma. Morelos, 9.ix.1983 G. Santiago s.n. (paratype, FCME 11596); Mpio. Sta. Clara, Pátzcuaro, San Gregorio, s.d. Guzmán 18152 (paratype, ENCB). | ||||||||
discussion | double click in markup mode to edit. | ||||||||
citations | —R. E. Tulloss | ||||||||
editors | RET | ||||||||
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