Amanita instannea - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella

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name	Amanita instannea
name status	nomen provisorum
author	Tulloss, Kudzma, & States
discussion	—R. E. Tulloss
brief editors	RET

name

Amanita instannea

author

Tulloss, S. D. Russell et al.

name status

nomen provisorum

etymology

in-, particle used to negate an adjective + stannea, "tin" or "like tin"

specifically, not like the species A. stannea A. H. Sm. nom. prov.—the name of which has been misapplied to the present species.

GenBank nos.

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accession	locus	voucher	source



KY655766	nrLSU	30.viii.1994 Jack S. States AEF 1089 (MICH)	L. V. Kudzma, Annandale, NJ
KY655767	nrLSU	31.viii.1994 Jack S. States AEF 1095 (MICH)	L. V. Kudzma, Annandale, NJ
KY655768	nrLSU	31.viii.1994 Jack S. States AEF 1096 (MICH)	L. V. Kudzma, Annandale, NJ
KY655769	nrITS	30.viii.1994 Jack S. States AEF 1089 (MICH)	L. V. Kudzma, Annandale, NJ
KY655770	nrITS	31.viii.1994 Jack S. States AEF 1093 (MICH)	L. V. Kudzma, Annandale, NJ
KY655771	nrITS	31.viii.1994 Jack S. States AEF 1095 (MICH)	L. V. Kudzma, Annandale, NJ
KY655772	nrITS	31.viii.1994 Jack S. States AEF 1096 (MICH)	L. V. Kudzma, Annandale, NJ
MK351820	nrITS	summer.2003 Larry Evans s.n. (RET 372-8)	L. V. Kudzma, Annandale, NJ
MK351836	nrLSU	summer.2003 Larry Evans s.n. (RET 372-8)	L. V. Kudzma, Annandale, NJ
OL439039	nrITS-LSU	26.vii.2016 Britt Bunyard s.n. (RET 734-8)	S. D. Russell, Marion, IN
OL439040	nrITS-LSU	15.viii.2016 Terri Clements & Donna Fulton TAC 1522 (RET 770-8)	S. D. Russell, Marion, IN

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.

Information below is from examination of dried basidiomes, genetic studies by L. V. Kudzma, and other original research of R. E. Tulloss.

pileus

margin nonappendiculate, short striate; universal veil not present.

stipe

universal veil as robust saccate volva, often with rusty stains, with volva sometimes separated into membranous or submembranous fragments by basidiome expansion, sometimes with these fragments become rusty, brown, or sordid.

odor/taste

neither recorded.

macrochemical
tests

none recorded.

basidia

4-sterigmate...

stipe context

longitudinally acrophysalidic; ...

partial veil

absent.

lamella edge tissue

sterile.

basidiospores

send to graphing tool

[80/4/3] (9.6-) 10.1 - 14.0 (-15.0) × (7.5-) 8.8 - 12.5 (-13.5) μm, (L = 11.2 - 12.3 μm; L' = 11.7 μm; W = 9.9 - 11.0 μm; W' = 10.3 μm; Q = (1.04-) 1.06 - 1.25 (-1.39); Q = 1.11 - 1.15; Q' = 1.13), hyaline, colorless, smooth, thin-walled, inamyloid, subglobose to broadly ellispoid to (infrequently) ellipsoid, adaxially flattened, sometimes narrowing toward one end; apiculus sublateral, cylindric; contents guttulate; color in deposit not recorded.

ecology

At 1889-2835 m elev. In grove of Populus tremuloides or with Pop. tremuloides and Pinus ponderosa or with Pop. tremuloides and Picea or with Pop. tremuloides and mixed conifers..

material examined

U.S.A.: ARIZONA—Apache Co. - Apache Nat. For. [35.2374º N/ 109.5725º W, 1889 m], 15.viii.2016 Terri Clements & Donna Fulton TAC 1522 [mushroomobserver #248703] (RET 770-8, nrITS-LSU seq'd.); White Mtns., ca. Greer, Udall Knoll [33.9072º N/ 109.4085º W, 2835 m], 26.vii.2016 Britt Bunyard s.n. (RET 734-8, nrITS-LSU seq'd.). Coconino Co. - San Francisco Peaks, 30.viii.1994 Jack S. State AEF 1089 (MICH on extended loan to RET, nrITS & nrLSU seq'd.), 31.viii.1994 Jack S. States AEF 1093 (MICH on extended loan to RET, nrITS seq'd.), AEF 1095 (MICH on extended loan to RET, nrITS & nrLSU seq'd.), AEF 1096 (MICH on extended loan to RET, nrITS & nrLSU seq'd.). COLORADO—Gunnison Co. - Crested Butte, summer.2003 Larry Evans s.n. (RET 372-8, nrITS & nrLSU seq'd.).

discussion

We were able to segregate this taxon phylogenetically using nrITS and nrLSU sequences.

Unfortunately, we have little information about characters observed on fresh material. Notes in the packets indicate that photos were taken of AEF1093 and AEF1096. Some caps have retained an orangish tint.

The basidiomes can be rather large and have some rusty stains on the cupulate or saccate or fragmented volva that are reminiscent of species such as A. fulva, A. nishidae, and A. populiphila.

A recent nrLSU tree of the Vaginatae included the present species as sister to a small grouping including branches representing A. sp-MN03 and A. populiphila. The hypothetical proximity to A. populiphila is interesting because at least one specimen of the present species (RET 372-8) was originally mistaken for A. populiphila on morphological grounds. This is further evidence that the cap of A. sp-AZ28 is off-white and may have a tendency to stain orangish or rusty and that the volva of the latter species is friable and stains as the cap does.

A comparison of the spores of the present species to those of A. populiphila and A. sp-MNO3 follows:

citations

—R. E. Tulloss

editors

RET

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name	Amanita instannea
name status	nomen provisorum
author	Tulloss, Kudzma, & States

name	Amanita instannea

name	Amanita instannea

Spore data for collections
provisionally identified as: Amanita instannea Tulloss, Kudzma, & States

Spore data sets and their composite

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.

basidiospore definition

Spore Measurements by Collection

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