21.ii.1997 B. Buyck, Moreau & Eyssartier 97.543−a (paratype, PC 0084420)
L. P. Tang et al. (2015), Kunming Inst. Bot.
The following text may make multiple use of each
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
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 directly from the
protolog of the present taxon.
NOTE: Spore measurements from papers by Z. L. Yang
use "Times New Roman" face symbols for "Q"
protolog: 30 - 70 mm wide,
white or dirty white to greyish (1A1; 2A1),
dull; context not described;
margin indistinctly striate
(0.1-R); universal veil as
pyramidal to subpyramidal or subconical warts,
2 −3 mm high, greyish to
brownish grey (2B2; 2C3−2C4; 3B1; 3C4).
protolog: 30 - 65 × 4 - 6 mm,
white to whitish (1A1; 2A1), nearly cylindrical,
hollow; partial veil submedian to
superior, white to whitish, membranous. universal
veil greyish to brownish grey, as small,
brownish to brownish grey warts or patches
irregularly distribuated, adnate to stipe
base, occasionally in incomplete rings.
protolog: 360–430 μm thick: suprapellis 140 - 170 μm thick,
more or less gelatinized, with filamentous hyphae
3 - 5 μm wide and predominantly radially arranged,
subpellis 220–260 μm thick, ungelatinized, with
filamentous hyphae 5 - 7 μm wide, more or
less radially arranged, pale yellowish
with mediostratum and lateral strata
consisting of cylindro-clavate to clavate to fusiform
to subfusiform, abundantly inflated cells 65 - 85 ×
12 - 16 μm mixed with thin-walled,
colorless and hyaline, 4 - 6 μm wide filamentous
hyphae; vascular hyphae rare or absent.
protolog: 50 - 65 × 10 - 12 μm,
usually 4-sterigmate, with sterigmata 4 - 6 μm long;
clamps not observed.
protolog: On pileus, upper
part of wart:
filamentous hyphae 5 - 7 μm wide, abundant,
thin-walled or with walls up to 0.5 μm thick,
branched, colorless, hyaline; inflated cells
abundant, mostly subglobose to ellipsoid,
30 - 55 × 15 - 30 μm, terminal singly or in chains
of 2 - 4; vascular hyphae rare.
lower part of wart:
similar to upper part, but with inflated cells
On stipe base: filamentous hyphae 4 - 6 μm
wide, very abundant,
densely arranged, with walls up to 1 μm thick,
colorless and hyaline, frequently septate
e; inflated cells 16 - 50 × 10 - 40 μm, locally
fairly abundant to rare; vascular hyphae
10 - 12 μm wide, rare.
protolog: Solitary or in small
group. By roadside with
protolog: MADAGASCAR: Eastern escarpment,
Andasibe [S 18°94′27.06″ E 48°41′71.38″, 1000 m],
21.ii.1997 B. Buyck, Moreau & Eyssartier 97.560
(paratype, PC 0084419), 97.543-a
(paratype, PC 0084420), 97.543-b (holotype,
At present, A. madagascariensis is known only
In the protolog, the present species is shown to
form a sub-basal clade of section Vaginatae
in an nrLSU tree. The reader may wish to
review this tree. The authors indicate that
the level of support for relationships within this
clade are not high. It is intriguing that
the present species
along with an unnamed African taxon and an African
species identified by the authors as
A. strobilaceovolvata appear in this
clade. All three members have a universal
veil with a warted surface; and all three members
of the clade are annulate species
of section Vaginatae that share
absence of clamps with all other
It is possible that the present species could have
been introduced to Madagascar with the eucalypt
that is the only known associate of A.
"However, according to Buyck
and his unpublished molecular data,
Cantharellus Adans. ex Fr. and other
ectomycorrhizal fungal species associated with
eucalypts in Madagascar are African in
origin rather than of Australian origin. It
is possible that
a host shift of ectomycorrhizal fungi has occurred
(Tedersoo et al. 2007)."
—L. P. Tang, Z. L. Yang, B. Buyck, and R. E. Tulloss
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L. P. Tang, Zhu L. Yang & B. Buyck
"Madagascar Ringed Ringless Amanita"
Spore data for collections provisionally identified as: Amanita madagascariensis L. P. Tang, Zhu L. Yang & B. Buyck
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.