name | Amanita belizeana | ||||||||||||||||||||||||||||||||
author | Tulloss & Vincent | ||||||||||||||||||||||||||||||||
name status | nomen provisorum | ||||||||||||||||||||||||||||||||
etymology | Belize + -ana, suffix indicating possession; hence, "of Belize" | ||||||||||||||||||||||||||||||||
GenBank nos. |
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intro |
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 based upon original research by R. E. Tulloss. | ||||||||||||||||||||||||||||||||
pileus | 35± - 90 mm wide, pale beige-brown (pinkish brown) over disc, paler at margin, pigment not evenly distributed (subvirgate or appearing densely freckled), at first subcampanulate, then hemispheric, eventually planoconvex, rather dry[?]; context white, up to 7 mm thick at stipe; margin ??short striate?? (0.??R), incurved at first, eventually straight; universal veil absent or (occasionally) as a small off-center, white, membranous patch. | ||||||||||||||||||||||||||||||||
lamellae | free to narrowly adnate, 8± per mm at margin, white when fresh, whitish to sordid tan in exsiccata, up to 10± mm broad, sublachrimiform with broadest region nearest pileus margin; lamellulae subtruncate to truncate, common, of diverse lengths. | ||||||||||||||||||||||||||||||||
stipe | 40± - 110 × 6± - 10 mm, white, cylindric, narrowing near apex; context white, stuffed, becoming hollow, with central cylinder ?? mm wide; partial veil white, pendulous, membranous, 3.5+ mm below pileus margin in largest specimen (with plano-convex pileus), up to 12 mm (radially) from stipe to edge; universal veil as cupulate to saccate volva, membranous, white, 11± - 20 mm from base to highest point on limb, 10± - 13 mm wide. | ||||||||||||||||||||||||||||||||
odor/taste | Odor mildly radish-like. Taste not recorded. | ||||||||||||||||||||||||||||||||
macrochemical tests |
none recorded. | ||||||||||||||||||||||||||||||||
lamella trama | bilateral, with very shallow angle of divergence, with divergent elements occasionally curving to form an angle of divergence of up to 30°; wcs = 65 - 75 µm (moderate to very good rehydration); filamentous, undifferentiated hyphae 2.8 - 7.5 µm wide, frequently branching, interwoven to tangled, with broadest constricted at septa, with slightly inflated intercalary cells (e.g., 80 × 17.2 µm, having walls thin or up to 0.8 µm thick), with some of these intercalary cells originating in central stratum (e.g., 58 × 13.2 µm) diverging into subhymenial tree and giving rise to elements therein; terminal, inflated cells not observed; vascular hyphae not observed; clamps not observed. | ||||||||||||||||||||||||||||||||
subhymenium | wst-near = 25 - 40 µm (very good rehydration); wst-far = 40 - 50 µm (very good rehydration); frequently branching structure containing many uninflated hyphal segments and occasional inflated (up to 17.0 × 10.0 µm) or partially inflated cells, with basidia arising from cells of all types; clamps not observed. | ||||||||||||||||||||||||||||||||
basidia | 45 - 70 × 7.2 - 13.5 µm, 4-sterigmate, with rather short and stubby sterigmata (e.g., 5.5 × 4.2 µm); ??clamps and proliferating clamps occasional in some regions, but apparently rare throughout most of hymenium??. | ||||||||||||||||||||||||||||||||
basidiospores | [41/2/1] (10.0-) 10.2 - 13.2 (-13.8) × (5.8-) 6.5 - 7.8 (-8.2) µm, (L = 11.6 - 12.5 µm; L’ = 12.0 µm; W = 7.2 - 7.3 µm; W’ = 7.2 µm; Q = (1.47-) 1.50 - 1.81 (-1.83); Q = 1.62 - 1.72; Q’ = 1.67), hyaline, colorless, thin-walled, smooth, inamyloid, ellipsoid to elongate, adaxially flattened, often expanded at one end; apiculus sublateral, cylindric to narrowly truncate-conic; contents monoguttulate, occasionally with additional small granules; color in deposit unknown. | ||||||||||||||||||||||||||||||||
ecology | Subgregarious. In duff of Pinus caribaea var. hondurensis woodland. | ||||||||||||||||||||||||||||||||
material examined | BELIZE: CAYO DISTR.—Belize Zoo Research Camp, 15.vi.1993 Michael A. Vincent & R. J. Hickey [Vincent] 6034 (MU F39533; RET 094-5). | ||||||||||||||||||||||||||||||||
discussion |
[Note: This material should be re-examined to be sure about the plenitude of clamps at the bases of basidia.] Sporograph comparisons for the present species and A. sp-F16 and A. sp-CR13 are presented in the following diagram. A sporograph for the latter taxon will appear in the figure when spore data is entered on its technical tab. | ||||||||||||||||||||||||||||||||
citations | —R. E. Tulloss | ||||||||||||||||||||||||||||||||
editors | RET | ||||||||||||||||||||||||||||||||
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