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

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name	Amanita tlaxcandela
name status	nomen provisorum
author	Tulloss and Sánch.-Ramírez
english name	"Mexican Candlestick Caesar"
intro	The following material is derived from the original research of this page's authors.
cap	The cap is 66 mm wide, brown at its center, and becoming pale to the edge. The cap's flesh is 7 mm thick over the stem and thins evenly for over 75% of its radius and then is membranous for the remaining distance to the edge. The cap's edge is grooved.
gills	The white gills are 6 mm broad, and have convex edges.
stem	The tallow candle colored stem is 119 x 11 mm and narrows upward. It is usually half buried in substrate. The stem's flesh is white and mostly hollow, the cavity is sometimes separated into chambers by white cottony material, and is unchanging when bruised or cut. The ring is white and locatedtoward the top of the stem; it appears to melt into the stem's surface. The white sack-like volva is membranous and 52 x 19 mm, it is about 2 mm thick at mid-height, and eventually collapses against the stem.
odor/taste	Odor and taste for this species were not recorded.
spores	The spores of the present taxon measure 11.0 - 13.0 (-15.0) × 7.1 - 8.3 (-9.6) μm and are ellipsoid to (occasionally) elongate and inamyloid. Clamps are probably present at bases of basidia.
discussion	This species was found growing by itself in a Pine (Pinus ), Oak (Quercus), and Fir (Abies ) forest. In the field this species was originally identified as A. calyptratoides because of the stem having the typical appearance of the stem of the latter species. Also there are similarities in the spores of the two species. The cap of the present taxa appears to be less gray than most specimens of A. calyptratoides; the limited field notes simply give the cap color as brown. The grooves on the cap's edge appear to be proportionally longer in A. tlaxcandela than in A. calyptratoides. The single known specimen for the present species lacks a membranous volval patch on the cap; such a patch is a prominent characteristic of A. calyptratoides. All comparisons have to be treated with caution because we have notes on only a single specimen of A. tlaxcandela. Phylogenetic studies indicate that the two taxa are distinct.—R. E. Tulloss, S. Sánchez-Ramírez, and N. R. Goldman
brief editors	RET

name

Amanita tlaxcandela

author

Tulloss and Sánchez-Ram.

name status

nomen provisorum

english name

"Mexican Candlestick Caesar"

etymology

Tlaxcala + "candela" (candle)—an elision.

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



JX844689	nrITS (partial)	20.viii.1998 Anna Gerenday s.n. [Tulloss 8-20-98-B] (RET 292-1; TLXM)	S. Sanchez et al., (direct deposit), Roy. Ontario Mus., Toronto
KF877087	rpb2	20.viii.1998 Anna Gerenday s.n. [Tulloss 8-20-98-B] (RET 292-1; TLXM)	S. Sanchez et al., (direct deposit), Roy. Ontario Mus., Toronto
KF877182	tef1	20.viii.1998 Anna Gerenday s.n. [Tulloss 8-20-98-B] (RET 292-1; TLXM)	S. Sanchez et al., (direct deposit), Roy. Ontario Mus., Toronto
KF877297	nrLSU	20.viii.1998 Anna Gerenday s.n. [Tulloss 8-20-98-B] (RET 292-1; TLXM)	S. Sanchez et al., (direct deposit), Roy. Ontario Mus., Toronto

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 derived from original research of this page's authors.

pileus

66 mm wide, brown over disc becoming paler toward margin; context white, unchanging when bruised or cut, 7 mm thick over stipe, thinning evenly for 80% of radius, then membranous to margin; margin striate (0.25R), nonappendiculate; universal veil not evident in single known specimen.

lamellae

??, ??, white, 6 mm broad, broadest ca. mid-radius, ventricose; lamellulae ??.

stipe

119 × 11 mm, with appearance and color of tallow candle, narrowing upward, one-half buried in substrate; context hollow, white, uncanging when bruised or cut, with some cross-walls of loosely packed white cottony material, with central cylinder occupying ca. 40-50% of stipe width; partial veil white, superior, appearing to melt into stipe surface; universal veil as saccate volva, white, membranous, 52 × 19 mm, 1.5 - 2 mm thick at mid-height, eventually collapsing on stipe.

odor/taste

not recorded.

macrochemical
tests

none recorded.

lamella edge tissue

sterile.

basidiospores

send to graphing tool

[20/1/1] 11.0 - 13.0 (-15.0) × 7.1 - 8.3 (-9.6) μm, (L = 12.0 μm; W = 7.9 μm; Q = (1.36-) 1.39 - 1.67 (-1.69); Q = 1.52), ??, smooth, inamyloid, ellipsoid to (occasionally) elongate, adaxially flattened; apiculus sublateral, ??; contents ??; color in deposit not recorded.

ecology

Solitary. At 2775 m elev. In Pinus-Quercus-Abies forest.

material examined

MEXICO: TLAXCALA—Mpio. Tlaxco, Cerro El Peñon, ca. km 4.5 on Camino El Rosario, El Rodeo [19°41'19" N/ 98°14'02"W, 2775 m], 20.viii.1998 Anna Gerenday s.n. [Tulloss 8-20-98-B] (RET 292-1; TLXM).

discussion

In the field, this species was originally identified as A. calyptratoides because of the stipe's having the typical appearance of the stipe of the latter species as well as there being similarities general basidiome stature. The cap appears to be less gray than most specimens of A. calyptratoides, and the limited field notes simply give the cap color as brown. The marginal striations appear to be proportionally longer in A. tlaxcandela. The single annotated specimen for the present species has no membranous volval patch on the cap; such a patch is a prominent characteristic of A. calyptratoides. All comparison has to be done with caution because we have notes on only one specimen.

The very similar spores of A. tlaxcandela and A. calyptratoides are compared via sporographs in the following figure:

Phylogenetic studies indicate that the two taxa are distinct.

citations

—R. E. Tulloss and S. Sánchez-Ramírez

editors

RET

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name	Amanita tlaxcandela
name status	nomen provisorum
author	Tulloss and Sánch.-Ramírez
english name	"Mexican Candlestick Caesar"

name	Amanita tlaxcandela

name	Amanita tlaxcandela

Spore data for collections
provisionally identified as: Amanita tlaxcandela Tulloss and Sánch.-Ramírez

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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