name | Amanita crassiconus |
name status | nomen provisorum |
author | Bas |
english name | "African Thick-Warted Lepidella" |
images | |
intro |
The following is based on the description of Bas (1969). |
cap |
The cap of Amanita crassiconus is about 70 - 90 mm wide, plano-convex, rather fleshy, probably whitish or pale grayish, dry, with a nonsulcate, appendiculate margin. The cap is covered with pale gray, adnate warts, at the margin merely felted-flocculose with some scattered, crust-like, probably pale gray patches. No cap skin is present, and the volval material is directly attached to the pileus context. Some of the darkening of the volva in age is apparently due to the dark hyphae of an infecting hyphomycete. The flesh is white. |
gills |
The gills are crowded, free, moderately broad, and probably white or cream. The short gills are attenuate. |
stem |
The stem is about 80 - 100 × 8 - 10 mm, probably whitish on the upper part and grayish below, probably solid, subfelted-flocculose, exannulate (sometimes with narrow flocculose zone near the stem's top). The lower stem has thin, felted, incomplete, brownish-grayish volval girdles that disappear with aging. The stem bears a clavate-fusiform bulb measuring about 30 - 40 × 15 - 25 mm. |
spores |
The spores measure (7.2-) 8.5 - 10.8 (-16.8) × (5.9-) 6.5 - 8.0 (-11.5) µm and are amyloid and subglobose to ellipsoid. Clamps are present at bases of basidia. |
discussion |
The absence of a cap skin (pileipellis) is common in Amanita subsection Vittadiniae and infrequent in other parts of Amanita section Lepidella. Superficially, the present species is reminiscent of A. magniverrucata Thiers & Ammirati. The material reviewed by Dr. Bas was from the Northern Provinces of Nigeria. Associated symbionts are not known. The present provisional species was placed by Dr. Bas in his stirps Crassiconus as its single member.—R. E. Tulloss |
brief editors | RET |
name | Amanita crassiconus | ||||||||||||||||||||||||
author | Bas nom. prov. 1969. Persoonia 5: 500, figs. 269-271. | ||||||||||||||||||||||||
name status | nomen provisorum | ||||||||||||||||||||||||
english name | "African Thick-Warted Lepidella" | ||||||||||||||||||||||||
GenBank nos. |
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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 data presented below is derived from the revision of Bas (1969), from Dr. Bas' annotations and drawings concerning the Nigerian collection (generously copied for RET), and original research by R. E. Tulloss. | ||||||||||||||||||||||||
basidiospores |
Bas (1969): [20/2/1] (7.0-) 8.0 - 10.0 (-10.5) × 6.5 - 7.5 (-8.0) μm, (Q = 1.10 - 1.50; Q = 1.30), slightly yellowish, thin-walled, smooth, amyloid, subglobose to broadly ellipsoid to ellipsoid, sometimes swollen at one end, sometimes adaxially flattened; apiculus not described; contents refractive, guttulate; color in deposit not recorded. [100/5/4] (7.2-) 8.5 - 10.8 (-16.8) × (5.9-) 6.5 - 8.0 (-11.5) μm, (L = 9.0 - 9.8 μm; L' = 9.4 μm; W = 7.1 - 7.4 μm; W' = 7.3 μm; Q = (1.13-) 1.19 - 1.43 (-1.46); Q = 1.25 - 1.35; Q' = 1.30), ??, smooth, amyloid, ??; apiculus sublateral, cylindric; contents ??; color in deposit not recorded. | ||||||||||||||||||||||||
ecology |
Bas (1969): Terrestrial. | ||||||||||||||||||||||||
material examined |
Bas (1969): NIGERIA: NIGER—Kantagora, viii.1963 S. O. Alasoadura 117 (K). ZAMBIA: COPPERBELT PROV.—ca. Kitwe, in or ca. Chembe Reserve, 14-24.xii.2000 David Arora 00-400 (SFSU; RET 348-5); ca. Kitwe, ca. Garneton, 14-24.xii.2000 David Arora 00-351 (SFSU; RET 344-8), 00-379 (RET 345-2); off Kitwe-Ndola Rd., Greystone Farm, 14-24.xii.2000 David Arora 00-375 (SFSU; RET 348-7). | ||||||||||||||||||||||||
citations | —R. E. Tulloss | ||||||||||||||||||||||||
editors | RET | ||||||||||||||||||||||||
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name | Amanita crassiconus |
name status | nomen provisorum |
author | Bas |
english name | "African Thick-Warted Lepidella" |
images | |
photo |
Drawing: Dr. Cornelis Bas (1969) (Nigeria, courtesy of Persoonia, Leiden, the
Netherlands) |
name | Amanita crassiconus |
bottom links |
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name | Amanita crassiconus |
bottom links |
[ Section Lepidella page. ]
[ Amanita Studies home. ]
[ Keys & Checklists ] |
Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer; and explanations prepared for this site talk about specimen-observer pairs associated with each data set. Combining more data into a single data set is non-optimal because it obscures observer differences (which may be valuable for instructional purposes, for example) and may obscure instances in which a single collection inadvertently contains a mixture of taxa.