Amanita sp-M15 - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella

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name	Amanita sp-M15
name status	cryptonomen temporarium
author	Tulloss et al.
images	1. Amanita sp-M15, Mpio. Tlaxco, Tlaxcala edo., México.
intro	The following material is based on original research by R.E. Tulloss.
cap	The orange-brown to brown cap is up to 75 mm wide and is darkest over the center. The distribution of pigment over the cap suggests fine radial hairs. The cap is convex with a distinct rounded knob in the center depression. The cap's flesh is white with darker lines above the gills. The cap is 4 mm thick over the stem, thins evenly for more than half of its radius, and then is membranous to its edge. The edge is striate. No volval remnants are present.
gills	The pale cream gills are free and up to 8.5 mm broad. The short gills are cut off squarely or somewhat rounded, are unevenly distributed, and are of diverse lengths.
stem	The off-white stem is up to 161 x 11.5 mm and can become faintly brown from handling. The stem narrows upward and flares at the top. It is almost satiny at its top and has fine fibers near its bottom. The stem's flesh is off-white except where it is darker at the bottom above the base. The stem is hollow with a central cylinder 4.5 mm wide that is lined with wispy white fibers. The volva is sac-like and membranous; its surface and interior are soft and white. The volva is 57 x 21 mm and up to 1⁺ mm thick. A small internal limb is present at the point of the volva's attachment to the stipe.
odor/taste	This mushroom's odor is indistinct. It's taste was not recorded.
spores	t.b.d.
discussion	This species was found growing singly at 2800 m elevation in the dark loam of a mixed forest dominated by multiple species of Oak (Quercus), Mexican Weeping Pine (Pinus patula), Sacred Fir (Abies religiosa), a groundsel-like shrub in the Aster family (Baccharis conferta), and the Texas Madrone (Arbutus xalapensis). This species has also been called "Amanita species M24" by RET in species lists and draft keys.—R. E. Tulloss and N. Goldman
brief editors	RET

name

Amanita sp-M15

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
MK377378	nrITS	14.viii.1998 A. Kong Luz s.n. [Tulloss 8-14-98-A] (RET 292-9)	J. Geml et al., Naturalis Biodiversity Centre, Leiden
MZ615412	nrITS-LSU	31.viii.1994 A. Estrada Torres & L. Varela Fregoso p.p. , [Tulloss 8-31-94-K] (RET 133-6)	S. D. Russell, Marion, IN
MK377376	nrITS	16.vii.1996 A. Montoya Esquivel & R. E. Tulloss [Tulloss 7-16-96-C] (RET 256-4)	J. Geml et al., Naturalis Biodiversity Centre, Leiden
MK377377	nrITS	16.vii.1996 A. Montoya Esquivel & R. E. Tulloss [Tulloss 7-16-96-D] (RET 256-5)	J. Geml et al., Naturalis Biodiversity Centre, Leiden
MK377379	nrITS	18.viii.1998 C. E. Skovnik s.n. [Tulloss 8-18-98-C] (RET 293-1)	J. Geml et al., Naturalis Biodiversity Centre, Leiden
MK377375	nrITS	4.vii.1996 Adriana Montoya Esquivel 1544 (RET 252-3)	J. Geml et al., Naturalis Biodiversity Centre, Leiden

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 molecular studies of Drs. Jozsef Geml and Linas Kudzma and other original research by R. E. Tulloss.

pileus

up to 75 mm wide, orange-brown to brown, darkest over disc and (occasionally) over striations, unchanging when cut or bruised, subvirgate, convex with distinct umbo, becoming planoconvex with umbo in depression, tacky, subshiny; context white with sordid line over lamellae, 4 mm thick over stipe, thinning evenly for 0.65R, then membranous to margin; margin striate (0.4 - 0.45R), nonappendiculate; universal veil absent.

lamellae

free, ??, pale cream in mass, off-white in side view, up to 8.5 mm broad, broadest at about 0.75 distance from stipe to margin; lamellulae subtruncate to rounded truncate, unevenly distributed, of diverse lengths, infrequent.

stipe

up to 161 × 11.5 mm, off-white, becoming faintly brown from handling, narrowing upward, flaring at apex, subsatiny above, finely fibrillose below; context off-white except sordid in region of lower stipe not including base, unchanging when cut or bruised, hollow, with central cylinder 4.5 mm wide and lined with wispy white fibrils; exannulate; universal veil as saccate volva, membranous, white on surface and throughout interior, soft, up to 57 × 21 mm, up to 1+ mm thick, with point of attachment about 0.35 distance from stipe base to highest point of limb, with small limbus internus place approximately at point of attachment.

odor/taste

Odor indistinct. Taste not recorded.

macrochemical
tests

Spot test for laccase (syringaldazine) - completely negative throughout basidiome. Test voucher: Tulloss 8-31-94-A.

ecology

Solitary. At 2800 m elev. In dark loam of mixed forest dominated by Quercus spp. with Pinus patula, Abies religiosa, Baccharis conferta, and Arbutus xalapensis.

material examined

MÉXICO: EDO. MÉXICO—Mpio. Toluca - km 22 Toluca-Temacaltepec Rd., El Mapa [3150 m], 4.vii.1996 Adriana Montoya Esquivel 1544 (RET 252-3, nrITS seq'd.; TLXM). Mpio. Unkn. - Llano Grande, 18.viii.1998 C. E. Skovnik s.n. [Tulloss 8-18-98-C] (RET 293-1, nrITS seq'd.; TLXM). TLAXCALA—Mpio. Huamantla - El Volcán La Malintzi, La Cañada Grande [19°14’45” N/ 97°54’56” W, 3110 m], 16.vii.1996 A. Montoya Esquivel & R. E. Tulloss [Tulloss 7-16-96-C] (RET 256-4, nrITS seq'd.; TLXM), [Tulloss 7-16-96-D] (RET 256-5, nrITS seq'd.; TLXM). Mpio. Panotla - 1 km E of San Francisco Temezontla [19°20’41” N/ 98°16’31” W, 2640 m], 17.vii.1996 A. Montoya Esquivel & R. E. Tulloss [Tulloss] 7-17-96-D (RET 255-7, nrITS seq'd.; TLXM), 14.viii.1998 unkn. colls. s.n. [Tulloss 8-14-98-??] (RET ??; TLXM). Mpio. San Luis Teolocholco - Parq. Nac. La Malinche, SW slope of La Malintzi volcano [19°13’53” N/ 98°03’59” W, 3250-3290 ], 14.viii.1998 A. Kong Luz s.n. [Tulloss 8-14-98-A] (RET 292-9, nrITS seq'd.; TLXM). Mpio. Tlaxco - El Rodeo, Cerro El Peñon [19°41'19" N/ 98°14'02"W, 2775 m], 31.viii.1994 A. Estrada Torres & L. Varela Fregoso p.p. [Tulloss 8-31-94-A] (RET 133-9; TLXM), [Tulloss 8-31-94-G] (RET 133-10; TLXM), [Tulloss 8-31-94-K] (RET 133-6; TLXM), 14.vii.1996 A. Estrada Torres et al. [Tulloss 7-14-96-C] (RET 254-3; TLXM).

discussion

This species has also been called "Amanita species M24" by RET in species lists and draft keys.

citations

—R. E. Tulloss

editors

RET

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Spore data for collections
provisionally identified as: Amanita sp-M15 Tulloss et al.

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.

Spore Measurements by Collection

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