| name | Amanita aurantiovelata |
| name status | nomen acceptum |
| author | Schalkw. & G. M. Jansen |
| english name | "Chilean Orange Dust Amanita" |
| images |
 1. Amanita aurantiovelata, Cuinco, Los Lagos, Chile  2. Amanita aurantiovelata, from Southern Beech (Nothofagus) forest, Andean Chile.   3. Amanita aurantiovelata, from Southern Beech (Nothofagus) forest, Andean Chile.  4. Amanita aurantiovelata, from Southern Beech (Nothofagus) forest, Andean Chile. |
| cap | The cap of Amanita aurantiovelata is up to 45 mm wide, semiglobose when young, convex when older, with umbo, deep orange to red-orange when young, fading to orange or orange yellow and pale yellow later, at first felted and mat, later smooth and shiny, with a sulcate-striate margin. The volval remnants are fragile, deep orange, in slenderly conic warts with pallescent tips in the beginning, then later glabrous. |
| gills | Gills are free, moderately crowded, white to whitish, and often have a frimbriate edge, especially near the stem. Short gills are scarce. |
| stem | Its stem is up to 75 × 10 - 12 mm, clavate when young to almost cylindrical with approximately pointed bulbous base with age, solid, exannulate, white to pale yellow, somewhat pulverulent, with deep orange, floccose volval remnants at the base and on the top of the stem''s bulb. |
| spores | The spores of this species measure (8.8-) 9.0 - 12.0 (-12.6) × (6.0-) 6.4 - 7.6 (-9.0) µm, and are broadly ellipsoid to ellipsoid and inamyloid. Clamps are present at bases of basidia. |
| discussion |
Amanita auranitovelata was originally described from Chile in association with Nothofagus. It is locally quite common in the coastal and Andean cordilleras as well as in the valley between the ranges. Amanita aurantiovelata is probably of Gondwanan origin. Amanita xanthocephala (Berk.) D. A. Reid & Hilton of Australia appears rather similar macroscopically, but lacks clamps on basidia and has much more nearly rounded spores. The group of brightly colored taxa with powdery volvas (brightly pigmented, but fading in sunlight) having clamped basidia is very small and possibly comprises only distantly related, relict taxa. They are distinctly segregated from the clampless or nearly clampless taxa with exannulate stem and powdery volva in the "groups" related to A. farinosa Schwein. and A. xanthocephala. A brightly colored species with at least occasional basidial clamps is A. parcivolvata (Peck) E.-J. Gilbert; however, the relationship between the volva and the cap's skin in that species is closer to that of A. muscaria (distinct, separate, crumb-like warts on a cap skin that gelatinizes early in development) than it is to the present species, which retains a powdery smear of volva on the cap past maturity. Consequently, given our current understanding, A. aurantiovelata is rather isolated morphologically. The reader may also wish to see the page on Amanita calochroa Simmons et al.—R. E. Tulloss |
| brief editors | RET |
| name | Amanita aurantiovelata | ||||||||
| author | Schalkw. & G. M. Jansen. 1982. Persoonia 11: 515, fig. 1(a-f). | ||||||||
| name status | nomen acceptum | ||||||||
| english name | "Chilean Orange Dust Amanita" | ||||||||
| synonyms |
=Amanita gayana sensu Singer. 1969. Beih. Nova Hedwigia 29: 151. non Amanita gayana (Mont.) Mont. in Gay nom. dub. The editors of this site owe a great debt to Dr. Cornelis Bas whose famous cigar box files of Amanita nomenclatural information gathered over three or more decades were made available to RET for computerization and make up the lion's share of the nomenclatural information presented on this site. | ||||||||
| etymology | aurantius, orange + velatus, veiled; hence referencing the orange universal veil. | ||||||||
| MycoBank nos. | 110464 | ||||||||
| GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
| ||||||||
| holotypes | L | ||||||||
| 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 not directly from the protolog of the present taxon and related materials such as unpublished photographs or from another cited source is based on collections, photographs and field notes of Dr. Egon Horak and other original research of R. E. Tulloss. protolog: Basidiome medium-sized. | ||||||||
| pileus | protolog: up to 45 mm wide, semiglobose when young, convex when older, deep orange to red-orange when young, fading to orange or orange-yellow (4-5A6), pale yellow at margin, not umbonate, at first appearing felted, eventually shiny; context pale yellow below pileipellis, otherwise, white; margin at first slightly sulcate, later strongly sulcate-striate, nonappendiculate; universal veil as up to 2 mm high warts, fragile, deep orange (6A8), slenderly conic, pulverulent, with pallescent tips, detersile; pileipellis easily peeling for two-thirds of radius. | ||||||||
| lamellae |
protolog: free, moderately
crowded, white, with some edges
fimbriate especially near stipe; lamellulae
scarce. RET: free, moderately crowded, white, with some edges fimbriate especially near stipe; lamellulae scarce (not observedyet?? in material examined). | ||||||||
| stipe |
protolog: up to 75 × 12+ mm, pale yellow (2A4), at first
narrowing upward, later nearly cylindric, somewhat
pulverulent (sometimes with superior
pulverulent zone); bulb up to 22 mm wide, with or
without slightly rooting pointed base,
proportionately broadest when young; context
white, solid; exannulate; universal veil friable,
floccose, deep orange, on base of stipe or bulb. RET: up to 75 × 12+ mm, pale yellow (2A4), at first narrowing upward, later nearly cylindric, somewhat pulverulent (sometimes with superior pulverulent zone); bulb up to 22 mm wide, with or without slightly rooting pointed base, proportionately broadest when young; context white, solid; exannulate; universal veil friable, floccose, deep orange, predominantly remaining on bottom 1–2 cm of stipe base and on bulb above its broadest part. | ||||||||
| odor/taste |
protolog: Odor
indistinct. Taste mild. Inedible according to Garrido-G. (1985). | ||||||||
| macrochemical tests |
none recorded. | ||||||||
| pileipellis | protolog: "ixocutis" of colorless, gelatinized hyphae. [Note: It is not clear if this is a suprapellis with an undescribed ungelatinized subpellis or a single-layered and totally gelatinized pileipellis. The latter would be unusual in Amanita.—ed.] | ||||||||
| pileus context | not described. | ||||||||
| lamella trama | protolog: "approximately bilateral." | ||||||||
| subhymenium | protolog: "inflated." [Note: In an accompanying figure, a basidium appears to arise from an uninflated hyphal segment. Hence, "inflated" may mean that there were inflated cells in the subhymenium rather than that the tissue was composed entirely of inflated cells.—ed.] | ||||||||
| basidia |
protolog: 35 - 65 × 7.0 - 14.0
µm, 4-sterigmate; clamps present. RET: 35 - 65 × 7.0 - 14.0 µm, dominantly 4-, also 5- and 3-sterigmate, with sterigmata up to ?? × ?? µm; clamps frequent. | ||||||||
| universal veil | protolog: On pileus: with all elements near disc arranged anticlinally; filamentous hyphae 5.0 - 12.0 μm wide, branching; inflated cells subglobose to ellipsoid to pyriform, yellowish, thin-walled, 20 - 65 × 18.0 - 37 μm, in terminal in chains of 4 - 6 cells (without exception). On stipe base: filamentous hyphae 2.5 - 6.0 μm wide, branching, very abundant, "somewhat encrusted"; inflated cells often large (up to 175 × 80 μm), terminal, singly or in short chains. | ||||||||
| stipe context | protolog: longitudinally acrophysalidic; filamentous hyphae 2.5 - 6.0 μm wide, sparsely branching; acrophysalides up to 200 × 35 μm. | ||||||||
| partial veil | absent | ||||||||
| lamella edge tissue | protolog: filamentous hyphae present as relatively short and sometimes branching segments; inflated cells terminal singly or in chains, globose to ellipsoid to elongate or irregular 9.0 - 45 × 10.0 - 25 μm. RET: sterile. | ||||||||
| basidiospores |
protolog: [-/-/-] 8.0 - 11.5
× 6.5 - 8.0 μm, (Q = 1.20 - 1.50 (-1.65); est. Q' = 1.35),
hyaline, colorless, smooth, thin-walled, inamyloid,
broadly ellipsoid to ellipsoid, rarely elongate,
adaxially flattened (per illustrations);
apiculus sublateral (per illustrations),
"sometimes truncate,"
"broad"; contents not recorded;
white in deposit. RET: [61/3/3] (8.8–) 9.0–12.0 (–12.6) × (6.0–) 6.4–7.6 (–9.0) µm, (L = 9.6–11.0 µm; L' = 10.2 µm; W = 6.8–7.4 µm; W' = 7.0 µm; Q = (1.28–) 1.34–1.61 (–1.69); Q = 1.40–1.50; Q' = 1.46), hyaline, colorless, thin-walled, smooth, inamyloid, adaxially flattened, ellipsoid to occasionally elongate; apiculus sublateral, proprotionately large and markedly projecting, cylindric to truncate-conic; contents dominantly monoguttulate with additional small granules; white in deposit. | ||||||||
| ecology |
protolog: Chile: Solitary. Under
Nothofagus obliqua. With regard to additional research in Chile, Valenzuela et al. (1999) report that this species was not present in the Nothofagus forests studied in the Cordillera de la Costa and the Cordillera de los Andes; however, it was a common species in forest of the Depresión Intermedia—occurring there with N. dombeyi, N. obliqua, and other unidentified Nothofagus species. | ||||||||
| material examined |
protolog: CHILE:
LOS LAGOS—30 km W of Osorno, Cuinco
[40.6417° S/ 73.4417° W], 3.vi.1979
Jansen & Schalkwijk XVI-251 (holotype,
L). RET: CHILE: BÍO BÍO—Curanilahue, Trongol Bajo, 32.v.1982 N. Garrido-G. 519 (M n.v., ZT (Horak)). LOS LAGOS—Valdivia, Elvira, Cuesta Sta., 14.v.1967 R. Singer M6889 (SGO n.v.), 15.v.1967 R. Singer M6912 (SGO n.v.), 8.iv.1975 E. Horak 75/280 (ZT (Horak)); Rebellín, 18.v.1990 E. Valenzuela & J. Grinsbergs s.n. (AH 13911 n.v., ZT (Horak) 5161). | ||||||||
| discussion |
In the protolog, the authors compared the present
species to others of section Amanita with an
exannulate stipe, colored
universal veil, and spores of comparable size and
shape. In the process, they pointed out
siginificant differences segregating their new
species from A.
mira, A. rubrovolvata,
and A. wellsii.
The reader may also wish to compare the present species with A. cruzii and A. roseitincta. | ||||||||
| citations | —R. E. Tulloss, G. M. Jansen, and E. Horak | ||||||||
| editors | RET | ||||||||
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| name | Amanita aurantiovelata |
| bottom links | [ Keys & Checklists ] |
| name | Amanita aurantiovelata |
| bottom links | [ Keys & Checklists ] |
Spore data sets and their composite
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