Amanita sp-Arora-01-555 - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella

[print] [map]

name	Amanita sp-Arora-01-555
name status	cryptonomen temporarium
english name	"Zambian Ringed Ringless Amanita"
images
intro	This species is based on a single specimen from Zambia. Molecular data has been obtained. We are inquiring concerning more morphological data.
cap	The umbonate cap of this species is yellow-brown and bears quite short marginal striations.
gills	The short gills of this species are truncate.
stem	The slender stem of A. sp-Arora-01-555 bears a narrow, membranous ring near the top. In the one specimen that is known, a membranous patch of whitish volva was found low on the stem.
odor/taste	Neither odor nor taste were recorded for this taxon.
spores	The spores of this species measure (10.2-) 10.5 - 13.2 (-15.0) × (7.3-) 7.9 - 9.4 (-10.5) μm and are broadly ellipsoid to ellipsoid and inamyloid. Clamps are not found at the bases of basidia.
discussion	The present species is known only from a single collection made in Zambia's Northern Province. Amanita sp-Arora_01-555 somewhat near A. madagascariensis based on the limited genetic data available concerning the latter. Both taxa belong in the small group within section Vaginatae that have rings on their stems.—R. E. Tulloss
brief editors	RET

name

Amanita sp-Arora-01-555

name status

cryptonomen temporarium

english name

"Zambian Ringed Ringless Amanita"

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



KU186807	nrITS	31.xii.2000-7.i.2001 David Arora 01-555 (RET 345-3)	L. V. Kudzma, Annandale, NJ
KU186808	nrLSU	31.xii.2000-7.i.2001 David Arora 01-555 (RET 345-3)	L. V. Kudzma, Annandale, NJ

pileus

yellow-brown, umbonate; context ??; margin short striate, nonappendiculate; universal veil absent.

lamellae

??; lamellulae truncate.

stipe

tall, with unknown amount of stipe base missing in sole exsiccatum; partial veil membranous, superior, persistent, proportionately narrow; universal veil as pallid membranous patch on lower stipe, ??.

odor/taste

neither recorded.

macrochemical
tests

none recorded.

universal veil

longitudinally acrophysalidic.

lamella edge tissue

sterile.

basidiospores

send to graphing tool

[40/1/1] (10.2-) 10.5 - 13.2 (-15.0) × (7.3-) 7.9 - 9.4 (-10.5) μm, (L = 11.9 μm; W = 8.7 μm; Q = (1.21-) 1.26 - 1.47 (-1.60); Q = 1.36), hyaline, colorless, smooth, thin-walled, inamyloid, broadly ellipsoid to ellipsoid, usually adaxially flattened; apiculus sublateral, cylindric; contents mono- to multiguttulate (oil drop type); color in deposit unrecorded.

ecology

not recorded.

material examined

ZAMBIA: NORTHERN PROV.—Mpika Distr. - ca. Mpika, 22 km off Great North Hwy., Mutinondo Wilderness Area, 31.xii.2000-7.i.2001 David Arora 01-555 (RET 345-3, nrITS & nrLSU seq'd.).

discussion

The most similar nrLSU sequence fragment in GenBank is a fragment of less than 400 characters from A. madagascariensis, an annulate species of sect. Vaginatae.

The following figure provides a comparison of the sporographs of the present species and A. madagascariensis:

citations

—R. E. Tulloss, L. V. Kudzma, and D. Arora

editors

RET

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

name	Amanita sp-Arora-01-555
name status	cryptonomen temporarium
english name	"Zambian Ringed Ringless Amanita"
images

name	Amanita sp-Arora-01-555

name	Amanita sp-Arora-01-555

Spore data for collections
provisionally identified as: Amanita sp-Arora-01-555

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]