Amanita sp-54

[print] [map]

name	Amanita sp-54
name status	cryptonomen temporarium
author	Tulloss & Rodríguez Caycedo
images	1. Amanita sp-54, Roosevelt, Monmouth Co., New Jersey, U.S.A. 2. Amanita sp-54, Roosevelt, Monmouth Co., New Jersey, U.S.A.
cap	The unevenly pigmented cap of Amanita sp-54 is 50 - 63 mm and predominantly gray-brown (darkest over disc); sometimes it appears coarsely streaky. At first it is subhemispheric; when expanded it can be irregularly planoconcave and, sometimes, depressed in the middle at maturity. Oddly, for species of sect. Validae, the cap margin is unevenly striate even when immature (at least in the few specimens seen so far). No volval warts or patches have been seen on the cap.
gills	The gills are free to receding with occasional short decurrent tooth and crowded. They are pale cream in mass and off-white in side view and unchanging when cut or bruised. Short gills are rounded or more or less smoothly narrowing on the inner ends. There is at least one between every pair of regular gills.
stem	The approximately cylindric stem is 77 - 92 × 8 - 8.5 mm long. It is whitish to pale cream and unchanging. The stem barely flares at its top in mature specimens. The bulb is barely broader than the stem and is sometimes dog-legged; it can be short or long and root-like. The stem is stuffed densely with white fibers; larval tunnels were not observed. The skirt-like ring is high on the stem, thin, membranous, white to cream above, yellowish below, with a band of yellow at the edge on the bottom. The crumbling yellow volva is present on the lower stem and upper bulb as patches or small warts that may be easily lost in collecting.
odor/taste	The odor is indistinct.
spores	Spores of this species measure (6.0-) 7.0 - 7.8 (-8.0) × (4.0-) 4.5 - 5.5 (-5.6) μm and are ellipsoid (infrequently elongate) and amyloid. Clamps are not present on basidia.
discussion	So far, this species is only known from one site in New Jersey where a pair of mushrooms was found under Norway Spruce at a short distance from White Pine during an extraordinarily rainy August. Amanita sp-54 is generally similar to A. flavoconia: however, it has the very unusual trait in sect. Validae of having a striate cap margin. In addition, the streaky gray-brown cap, yellow volva, very small spores and deeply rooting stem base are important diagnostic characters. There is a common undescribed species of sect. Vaginatae which is extremely similar when viewed from above.—R. E. and M. A. Tulloss and C. Rodríguez Caycedo
brief editors	RET

name

Amanita sp-54

name status

cryptonomen temporarium

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.

accession	locus	voucher	source



KX270306	nrITS	26.viii.2011 M. K. & R. E. Tulloss 8-26-11-A (RET 487-6)	L. V. Kudzma, Annandale, NJ
KX270307	nrITS	8.vi.2012 Stephen Roberts s.n. (RET 503-9)	L. V. Kudzma, Annandale, NJ
MW592834	nrITS-LSU	7.vi.2019 Ron Pastorino 6-7-19F (RET 868-4)	S. D. Russell, Marion, IN

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 original research of R. E. Tulloss and C. Rodríguez Caycedo.

pileus

50 - 63 mm, unevenly pigmented, predominantly gray-brown, darker over disc, with margin slightly darker than 5D3 and disc 5E-F4, virgate or more coarsely streaky, subhemispheric to irregularly planoconcave, sometimes centrally depressed at maturity, tacky, dull; context pale cream, except gray between stipe apex and pileipellus, unchanging, 2.5 - 4 mm thick above stipe, thinning evenly for 75 - 80% of cap radius then membranous to margin; margin unevenly striate (0.2-0.4R) even when immature, nonappendiculate; universal veil absent.

lamellae

Free to receding with occasional short decurrent tooth, crowded, pale cream in mass, off-white in side view, unchanging, 4 - 7 mm broad, broadest at about 80% of length from stipe; lamellulae rounded truncate, subattenuate, attenuate, attenuate in steps, evenly distributed (at least one between every pair of lamellulae), of diverse lengths.

stipe

77 - 92 × 8 - 8.5 mm, whitish to pale cream, unchanging, narrowing upward or cylindric, barely flaring at apex in mature specimen, faintly longitudinally striatulate; bulb barely broader than stipe, as short to extended radical, 11.5 - 33⁺ × 8.5 - 9.5 mm, sometimes dog-legged; context stuffed, off-white, unchanging, with central cylinder 1.5 - 2.5 mm wide, with stuffing comprising dense longitudinally oriented white fibers, with obconic lacuna just below pileus context, with larval tunnels not observed; partial veil superior, thin, membranous, white to cream above, yellowish below, with band of yellow at edge on undersurface; universal veil as patches or crumb-like fragments, rather bright yellow, friable, detersile.

odor/taste

Odor indistinct. Taste not recorded

macrochemical
tests

none recorded.

basidiospores

send to graphing tool

[20/1/1] (6.0-) 7.0 - 7.8 (-8.0) × (4.0-) 4.5 - 5.5 (-5.6) μm, (L = 7.4 μm; L' = 7.4 μm; W = 5.0 μm; W' = 5.0 μm; Q = (1.36-) 1.38 - 1.60 (-1.64); Q = 1.49; Q' = 1.49), hyaline, colorless, smooth, thin-walled, amyloid, ellipsoid ,infrequently elongate, adaxially flattened; apiculus sublateral, cyclindric; contents monoguttulate, with or without granules; white in deposit.

ecology

Indiana: In hardwood forest. New Jersey: Paired. At 43 m elev. In sandy loam under Picea abies with Pinus strobus at 15-20 m distance with Quercus at 50 m or more distance.

The original collection (RET 503-9) was made during a period of extraordinary rainfall.

material examined

U.S.A.: INDIANA—Monroe Co. - Burlington, Griffey Lk., 8.vi.2012 Stephen Roberts s.n. [mushroomobserver #96720] (RET 503-9, nrITS seq'd.). NEW JERSEY—Monmouth Co. - Roosevelt, Farm Lane [40°13'01" N/ 74°28'16" W, 43 m], 26.viii.2011 M. K. & R. E. Tulloss 8-26-11-A (RET 487-6, nrITS seq'd.). TEXAS—Unkn. Co. - Big Thicket Nat. Preserve, Turkey Creek Unit, Gore Rd. Tr. [30.5078° N/ 94.3506° W, 33 m], 7.vi.2019 Ron Pastorino 6-7-19F [mushroomobserver #371463] (RET 868-4, nrITS-LSU seq'd.).

discussion

The most curious characteristic of the present species is the occurence of marked marginal striations on incompletely opened (hemispheric) pilei before the start of sporulation. If this trait is found consistently in future collections, this species will be the only one in sect. Validae known from North America to have this characteristic.

With the exception of the above trait, A. sp-54 is similar to taxa such as A. elongata and A. flavoconia. As shown in the following illustration, A. sp-54 has spores that are distinctively smaller than those of the other two named species.

citations

—R. E. Tulloss and C. Rodríguez Caycedo

editors

RET

Information to support the viewer in reading the content of "technical" tabs can be found here.

name	Amanita sp-54
name status	cryptonomen temporarium
author	Tulloss & Rodríguez Caycedo
images	1. Amanita sp-54, Roosevelt, Monmouth Co., New Jersey, U.S.A. 2. Amanita sp-54, Roosevelt, Monmouth Co., New Jersey, U.S.A.
photo	RET - (1-2) Roosevelt, Monmouth County, New Jersey, U.S.A.

name	Amanita sp-54

name	Amanita sp-54

Spore data for collections
provisionally identified as: Amanita sp-54 Tulloss & Rodríguez Caycedo

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

[top]

infrasp. taxa of flavoconia
3

infrasp. taxa of franchetii
2

infrasp. taxa of fritillaria
2

infrasp. taxa of pilosella
2

infrasp. taxa of rubescens
1

Spore Measurements by Collection

infrasp. taxa of flavoconia3

infrasp. taxa of franchetii2

infrasp. taxa of fritillaria2

infrasp. taxa of pilosella2

infrasp. taxa of rubescens1

Amanita sp-54

Spore Measurements by Collection

infrasp. taxa of flavoconia
3

infrasp. taxa of franchetii
2

infrasp. taxa of fritillaria
2

infrasp. taxa of pilosella
2

infrasp. taxa of rubescens
1