| name |
Amanita thria |
| author |
Tulloss & Kudzma |
| name status |
nomen provisorum |
| etymology |
Thria was the nurse of Apollo in Greek mythology.
She is said to have invented divination by means of
drawing pebbles from a jar. The upper part of the
unusual volva in the present species remains on the
cap like a group of pebbles. |
| 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.
|
| pileus |
30 - 60 mm wide, chocolate brown, becoming gray-brown or dark gray-brown with age,convex to planoconvex, sometimes depressed over disc, subviscid to dry; context white to sordid white, up to 6 - 8 mm thick over stipe; margin striate (0.35R - 0.5R), nonappendiculate; universal veil as irregular warts and patches, whitish at first, becoming grayish with age, adnate, granular, often densely placed over disc. |
| lamellae |
free, close, white both in mass and in side view, unchanging when cut or bruised, becoming grayish with age, 3 - 8 mm broad, often forking, with fimbriate margin becoming light gray in age; lamellulae truncate to rounded truncate, relatively common, not between every pair of otherwise adjacent lamellae, of diverse lengths. |
| stipe |
60 - 90 × 5 - 14 mm, white at first, graying somewhat with age, cylindric, not flaring at apex, dry and subsquamose above partial veil, sometimes becoming fibrillose-shaggy or with surface cracking into recurved scales below partial veil, with obconic base; context stuffed to hollow, white; partial veil superior, membranous, skirt-like, fragile, sometimes persistent, whitish at first, becoming sordid with age, striate above, collapsing on stipe with age; universal veil cupulate to saccate, up to 55 × 19 mm, sometimes with upper edge of limb decorated with warts like those found on pileus. |
| odor/taste |
Odor slight. Taste not recorded. |
macrochemical
tests |
none recorded. |
| lamella edge tissue |
sterile. |
| basidiospores |
[50/3/3] (9.9-) 10.5 - 14.1 (-16.5) × (6.6-) 7.0 - 9.1 (-10.5) μm, (L = 12.2 - 12.4 μm; L' = 12.3 μm; W = 7.8 - 8.0 μm; W' = 7.8 μm; Q = (1.38-) 1.39 - 1.75 (-1.88); Q = 1.55 - 1.58; Q' = 1.56), colorless, hyaline, thin-walled, smooth, inamyloid, ellipsoid to elongate, adaxially flattened; apiculus sublateral, cylindric or truncate-conic; contents dominantly monoguttulate with or without additional small granules; white in deposit. |
| ecology |
Solitary to gregarious. Missouri: In rocky clay soil near old Quercus stellata. Texas: With Q. pagoda. |
| material examined |
U.S.A.:
ILLINOIS—Cook Co. - Chicago River Tr. [42.0244º
N/ 87.8739º W, 195 m], 7.viii.2017 Turk Meyers s.n. (RET
810-3, nrITS seq'd.).
MISSIPPI—Clay Co. - Montpelier [33.7134º N/
88.9469º W, 86 m], 7.viii.2017 David Tate s.n. (RET 810-4,
nrITS seq'd.).
MISSOURI—Butler Co. - Poplar Bluff
[36.7124° N/ 90.407° W, 98 m], 17.ix.2012 John
McDonough s.n. [mushroomobsever
#110108]
(RET 516-8, nrITS seq'd.).
TEXAS—Tyler Co. - Forest Lake,
plot 9, 6.ix.1992 David P. Lewis 4788
(RET 617-8). |
| discussion |
The spores in this taxon are rather broader
than the spores of A. spreta:
Some time ago we wrote: "We only have two mature collections of the present
species and one that is in a relatively early stage of
sporulation. Given that the spore size in the
material examined shows little variation so far and
that the break-up of the universal veil into small
fragments is consistent in all the material, it seems
increasingly likely that this taxon is distinct from
A. spreta."
Molecular investigation reveals that this species is
a "Ringed Ringless Amanita." It can be assigned
to section Vaginatae and has a genetic marker
shared with other species of the "ringed ringless"
grouping and other apparently early diverging species
of the Vaginatae such as A.
penetratrix—the 5' motif of nrLSU for the
present species is "TCTGACCTCAAATCA."
On this site, the present species was formerly called
"Amanita sp-MO01." |
| citations |
—R. E. Tulloss |
| editors |
RET |
|
Spore data sets and their composite