Amanita coprinopsoides

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name

Amanita coprinopsoides

author

Tulloss

name status

nomen provisorum

english name

Coprinopsis-like Ringless Amanita

etymology

coprinopsis + -oides, like

GenBank nos.

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accession	locus	voucher	source
OL410603	nrITS-LSU	9.viii.2018 Geoff Balme s.n. (RET 874-8)	S. D. Russell, Marion, IN
MK093401	nrLSU	7.vi.2013 Ronald Pastorino 6-7-13U (RET 538-4)	L. V. Kudzma, Annandale, NJ
ON796541	nrITS-LSU	9.viii.2018 Geoff Balme s.n. (RET 874-4)	S. D. Russell, Marion, IN
MK204469	nrLSU	22.viii.1984 Cornelis Bas 9086 [Tulloss 8-22-84-P] (L; RET 236-10)	L. V. Kudzma, Annandale, NJ

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 on ?? and original research of R. E. Tulloss.

pileus

gray, finely virgate, with low umbo in central depression at maturity; context ??; margin nonappendiculate, tuberculate striate (0.35-0.45R); universal veil absent.

lamellae

white; lamellulae ??probably truncate.

stipe

white, somewhat sinuate, covered in lower two-thirds with small white fibrils; context ??; exannulate: universal veil as saccate volva, membranous, white, firm.

odor/taste

neither recorded.

macrochemical
tests

none recorded.

basidia

? × ? μm, 4-sterigmate; clamps probably rare or absent.

universal veil

On pileus: absent. On stipe base: ??.

partial veil

absent.

lamella edge tissue

sterile.

basidiospores

send to graphing tool

[40/2/2] (8.0-) 8.6 - 11.0 (-11.1) × (5.1-) 6.1 -8.0 (-9.5) μm, (L = 9.6 - 10.3 μm; L' = 10.0 μm; W = 6.9 -7.4 μm; W' = 7.2 μm; Q = (1.25-) 1.27 - 1.54 (-1.80); Q = 1.40; Q' = 1.40), colorless, hyaline, smooth, thin-walled, inamyloid, adaxially flattened; apiculus sublateral, cylindric; contents granular to multiguttulate to monoguttulate with additional small granules; white in deposit.

ecology

Solitary or in small groups. Alabama: Near small lake. Texas: In mixed forest.

material examined

U.S.A.: ALABAMA—Unkn. Co. - ca. border of Shelby and Jackson Cos., 22.viii.1984 Cornelis Bas 9086 [Tulloss 8-22-84-P] (L; RET 236-10, nrLSU, seq'd.). NORTH CAROLINA—Wake Co. - Raleigh, Umstead St. Pk. - 9.viii.2018 Geoff Balme s.n. (RET 874-4, nrITS-LSU seq'd.), (RET 874-8, nrITS-LSU seq'd.). TEXAS—Polk Co. - Big Thicket National Preserve, Big Sandy Creek Tr. [30.6112° N/ 94.6727° W, 80 m], 7.vi.2013 Ronald Pastorino 6-7-13U [mushroomobserver #136393] (RET 538-4, nrLSU, seq'd.).

discussion

The Alabama collection was made by Dr. Cornelis Bas on a foray with RET and Dr. David T. Jenkins in 1984. When Dr. Bas called our attention to the fungus, he immediately said that it should obviously be named "coprinoides." That genus has since been divided into a number of genera since that time; and we have picked the new species epithet accordingly.

The Texas collection was made by Ronald Pastorino and posted on mushroomobserver.org. The two collections yielded nrLSU sequnces with a 1411 character overlap that provides a 100% match. The Alabama sequence has a single ambiguity. The Texas sequence aligns as a subsequence of the Alabama one and has no ambiguities.

Possibly due to nonhomogenized nrITS, we have not been able to sequence more than a few characters of the 3' end of ITS and a few dozen character including the nrLSU 5' motif. The latter motif is of the dominant form seen in section Vaginatae—"TTTGACCTCAAATCA".

RET has contacted the herbarium at Leiden (L) to see if any notes were made by Dr. Bas on the Alabama collection. None were found.

citations

—R. E. Tulloss

editors

RET

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