| name |
Amanita sp-M36 |
| author |
Tulloss |
| name status |
cryptonomen temporarium |
| english name |
Fluffy Underskirt False Caesar |
| GenBank nos. |
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
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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 |
84 mm wide, pale yellow (slightly more yellow than 3A3) at first, then 3A2, no staining or bruising observed, subhemispheric, then convex and slightly flattened over disc, with decurved margin, waxy, dull; context off-white and pale tannish at the inner end of lamellae and beneath pileipellis, no staining or bruising observed, 9 - 10 mm thick, thinning evenly toward margin; margin sometimes appendiculate with ragged bits of partial veil, striate (0.?R); universal veil as large calyptra nearly covering pileus, whitish, membranous, easily removed. |
| lamellae |
free with decurrent lines connecting to apical partial veil, ??, cream in mass, pale cream to white in side view with pale tannish white along junction with pileus context, 8 - 10 mm thick, broadest at about two-thirds of radius from stipe, partially covered by shreds of partial veil, apparently rather thick; lamellulae truncate to rounded truncate, unevenly distributed, of diverse lengths, plentiful, may arise both at pileus margin and at stipe. |
| stipe |
79 × 21 mm, white, bruising and staining not observed, narrowing upward, not flaring at apex, longitudinally striatulate, somewhat shaggy-floccose below partial veil; context pale yellowish cream, staining and bruising not observed, with 4 mm wide central cylinder stuffed densely with white fibrillose material, with larval tunnels concolorous or slightly brownish; partial veil apical, white, submembranous, shredding, partially remaining on gills and cap margin, striate above, smooth subfloccose below; universal veil as saccate volva attached only at very base of stipe, fleshy, 50 × 38 mm, 7 - 8 mm thick at midpoint of free limb, with exterior and inner surfaces smooth and white, with interior white above junction with stipe base and pale tannish white below that junction, with limbus internus rather small and positioned rather high on the free limb of the volval sac. |
| odor/taste |
Odor somewhat like fish. Taste very slightly sweet at first, then faintly metallic. |
macrochemical
tests |
Spot test for laccase (syringaldazine) - negative. Spot test for tyrosinace (paracresol) - in just maturing specimen, positive rather slowly, first in lower half of stipe and universal veil below stipe base, then becoming stronger in both regions and very strong in pileipellis, finally (after 15 min.) faintly positive in upper part of stipe and pileus context (particularly above stipe) and on exterior surface of volval limb. Test voucher: Tulloss 8-18-98-B. |
| basidiospores |
??; white in deposit. |
| ecology |
Solitary. At ?? m elev. In dark, damp, sandy loam over volcanic ash. |
| material examined |
MÉXICO:
TLAXCALA—Mpio.
Huamantla - La Cañada Grande,
E slope, La Malintzi volcano [19°14’45” N/
97°54’56”
W, 3110 m], 24.vi.1988 Alejandro Kong Luz 615
(RET 127-1; TLXM as "A. affin.
calyptrata"), 13.vii.1988 A. Kong Luz 696
(RET 127-2; TLXM as "A. affin. calyptrata"),
11.vii.1990 G. Santiago Martínez 151 (RET 126-10;
TLXM as "A. affin. calyptrata");
Parq. Nac. La Malintzi, Altamira de Guadalupe,
11.vi.1985 I. González Fuentes 932 (NY).
Mpio. Mariano Arista - 4-5 km E of Nanacamilpa,
25.viii.1989 A. Kong Luz 1251 (RET 126-5; TLXM
as "A. calyptratoides").
Mpio. Tlaxco - Cerro El Peñón, 24.vi.1991 G.
Santiago Martínez 306 (RET 126-9; TLXM as
"A. affin. calyptrata"), 20.viii.1998
David P. Lewis s.n. [RET 8-20-98-A] (RET
293-3). Mpio. Trinidad Sánchez Santos, La Malintzi volcano, Parq. Nac. La Malinche, 4-7 km W of Francisco Javier Mina, 18.viii.1998 A. Kong Luz s.n. [Tulloss 8-18-98-B] (RET 293-4; TLXM). |
| discussion |
In the field, Tulloss 8-18-98-B was first thought to
be A. tuza and later thought to be
A. vernicoccora; however it was never worked
up microscopically. When J.-M. Moncalvo and S.
Sánchez Ramírez reported to me that the cited
collection is genetically isolated from material of
the macroscopically similar A. vernicoccora, a
code name was given to the above cited collection
(sp-M36). A number of other collections from
La Malinche volcano have also been assigned
provisionally to A. sp-M36.
This species appears to be most closely related to
the other taxa of Amanita stirps
Calyptroderma. In that stirps, the
cap color of the present species is most similar to
that of A.
vernicoccora.
The material described on this taxon page would
never have come to RET's attention if it were not
for the staff and students at the Autonomous
University of Tlaxcala. |
| citations |
—R. E. Tulloss |
| editors |
RET |
|
Spore data sets and their composite