| name |
Amanita tullossiana |
| author |
Mehmood, Iqbal Hosen, K. Das, and R. P. Bhatt.
2018. MycoKeys 37: 79. |
| name status |
nomen acceptum |
| english name |
"Himalayan Gray Dust Lepidella" |
| etymology |
Tulloss + -ianus, a possesive form; hence,
"of Tulloss" or "Tulloss'"; named in honor of Rodham E.
Tulloss
[Note: The name should not be confused with A.
tullossii Guzmán & Ram.-Guill., a
probable posterior synonym for
A.
jacksonii.—ed.] |
| MycoBank nos. |
822821 |
| 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 |
RET 717-4 |
| lectotypes |
CAL 1611 |
| 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 directly from the
protolog of the present taxon.
Basidiomes medium-sized to large. |
| pileus |
protolog: 90 - 170 mm wide,
initially
hemispherical then convex to plano-convex and finally
planar, shiny, slightly
viscid when moist, ash gray (1B2), pastel grey (1C1),
grey (4B1-4C1), brownish gray,
brownish-beige (6F2-3) to dark grey (1F1), slightly
darker at center; context
11 - 14 mm thick above stipe, white (1A1), thinning
evenly toward margin, unchanging
when cut or bruised; universal veil as
floccose to subfelted pulverulent
patches, dark grey (1F1) to brownish-grey (6F2),
greyish-black to dark grey (1F1),
soft, up to 4 mm thick, 7 - 12 mm wide, irregularly
distributed. |
| lamellae |
protolog: free to narrowly
adnate, crowded, white (1A1),
unchanging when injured, 6 - 10 mm broad, 8 - 9 per cm
at pileus margin;
lamellulae attenuate or truncate, plentiful,
of several lengths. |
| stipe |
protolog: 150 - 185 × 20 - 25 mm
(excluding bulb), attenuate upwards, with
upper part covered by dark grey (1F1) fibrils,
lower part covered with recurved
scales, with fibrils turn blackish when handled;
context solid, white, unchanging
on cutting or bruising; partial veil superior,
soft, cottony, white, easily collapsing or
deciduous; bulb 70 - 88 × 25 - 41 mm, napiform
to rooting; universal veil covering bulb with
brownish gray (6F2) to dark gray (1F1) remnants,
often causing grey (4B1) to dark grey (1F1)
recurving scales on upper bulb. |
| odor/taste |
protolog: Odor
indistinct. Taste not recorded. |
macrochemical
tests |
protolog:
5% KOH - negative on pileus.
2% phenol - negative [on pileus and in stipe
context].
FeSO4 crystals - negative
on pileus and in stipe context. |
| pileipellis |
protolog: 140 - 195 μm thick,
in two layers;
suprapellis 45 - 55 μm thick, gelatinized colorless;
subpellis 95 - 140 μm
thick; filamentous,
undifferentiated hyphae 2 - 6 μm
wide, densely arranged in subpellis, with
yellowish-brown intracellular pigment; vascular
hyphae 7–10 μm wide, infrequent. |
| pileus context |
protolog: filamentous,
undifferentiated
hyphae 2 - 6 μm wide, thin-walled, hyaline, interwoven; broadly clavate to ellipsoid
acrophysalides 86 - 130 × 26 - 45 μm, thin-walled,
hyaline. |
| lamella trama |
protolog: bilateral, divergent;
wcs= 60 - 80 μm;
well-rehydrated; filamentous, undifferentiated hyphae
3 - 8 μm wide; with lateral stratum
composed of intercalary inflated cells 66 - 110 × 12 -
19 μm wide; vascular hyphae
9 - 14 μm. |
| subhymenium |
protolog: 40 -
50 μm thick, with 3–4 layers of inflated
cells, wst-near = 35–50 μm,
wst-far= 50–70 μm, with basidia
arising from small inflated
cells 8 - 15 × 6 - 10 μm wide. |
| basidia |
protolog: 45 - 55(–65) × 9 - 14
μm, 2 to 4-sterigmate, thin-walled; sterigmata up to
4 μm long; clamps not observed after extensive
search. |
| universal veil |
protolog: Universal veil on
pileus: disordered;
filamentous, undifferentiated hyphae 2–6 μm wide,
branched, thin-walled, infrequent
to scattered, with pale yellow vacuolar pigments;
inflated cells dominantly globose to
subglobose 25 - 88 × 22 - 70 μm, infrequent, broadly
ellipsoid to ellipsoid or pyriform
40 - 60 × 10 - 13 μm, often in chains of 2–3, with
brownish to pale yellow vacuolar pigments;
vascular hyphae 6 - 12 μm wide, frequent.
Universal veil on stipe base: disordered;
filamentous, undifferentiated hyphae 2–5 μm wide, branched, thin-walled, scattered,
with pale yellow vacuolar pigments; inflated cells
dominantly globose to subglobose
30 - 70 × 25 - 65 μm, infrequent broadly ellipsoid
to elongated cells 30 - 90 × 12 - 18 μm,
with brownish to pale yellow vacuolar pigments;
vascular hyphae 10 - 14 μm wide, often
present. |
| stipe context |
protolog: longitudinally
acrophysalidic; filamentous, undifferentiated
hyphae 5 - 7 μm wide; acrophysalides 150 - 230 × 35 -
56 μm, thin-walled, colorless,
hyaline, vascular hyphae not found. |
| partial veil |
protolog: inflated cells abundant, broadly
clavate to clavate 50 - 120 ×
16 - 29 μm, thin-walled, colorless, hyaline,
sometimes with yellowish-brown vacuolar
pigments; filamentous, undifferentiated hyphae 3 - 7
μm wide, dominant, thin walled,
hyaline, colorless or sometimes with yellowish-brown
pigments; vascular hyphae
4 - 8 μm wide. |
| lamella edge tissue |
protolog: sterile; inflated cells
dominating, globose to subglobose
(20 - 35 × 15 - 25 μm) or clavate to subclavate
(40 - 50 × 15 - 18 μm). |
| basidiospores |
protolog: [300/15/10] (8.5–)
9 – 13 (–13.5) × (5.8–) 6 – 8
(–8.5) μm, [L = 9.5 – 11 μm; L' = 10.5
μm; W = 6–7.5 μm; W' = 6.83 μm; Q =
(1.29–)1.40–1.66(–1.83), Q
= 1.38–1.59, Q' = 1.54],
hyaline, thin-walled, smooth, amyloid, ellipsoid,
infrequently broadly ellipsoid or elongate;
contents monoguttulate; apiculus lateral
to sublateral, up to 1 μm long; white in
deposit. |
| ecology |
protolog: Solitary to
subgregarious. At 2350-2655 m elev.
In temperate mixed forest of Quercus
semicarpifolia and Abies pindrow. |
| material examined |
protolog: INDIA:
UTTARAKHAND—Rudhraparyag Distr. -
Baniyakund [30.4833° N/ 79.1776° E, 2655 m],
26.viii.2014 T. Mehmood TM 14-475
(holotype, RET 717-4; isotype, CAL 1611),
14.vii.2015 T. Mehmood TM 15-624 (paratype,
GUH-M-27002), 1.viii.2015 T. Mehmood TM 15-786
(paratype, GUH-M-27003), 2.viii.2015 T. Mehmood
TM 15-815 (paratype, GUH-M-27004), 8.viii.2015
T. Mehmood TM 15-891 (paratype, GUH-M-27005),
30.viii.2015 T. Mehmood TM 15-1017 (paratype,
GUH-M-27006), 22.vii.2016 T. Mehmood TM 16-1123
(paratype, GUH-M-27007), 26.viii.2016 T. Mehmood TM
16-1369 (paratype, GUH-M-27008); Nainital Distr.,
Mukteshwar 24.viii.2016 T. Mehmood TM 16-1338
(paratype, GUH-M-27009). |
| citations |
—T. Mehmood, Md. Iqbal Hosen, K. Das, & R. P. Bhatt |
| editors |
RET |
|
