Amanita ifeifensis

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name	Amanita ifeifensis
name status	nomen provisorum
author	Tulloss, S. D. Russell & Alofe
english name	"Ife-Ife Ringless Amanita"
intro	We only have information about the appearance of a fruiting body of this species that could be deduced from dried material.
gills	We expect that marginal striations on the cap will take up more than half of the cap's radius.
stem	The volva at the stem base is sack-like and tubular. A lengthwise section of the stem will show the stem is attached the volva for a short distance on the stem's sides as well as at its base.
odor/taste	We have no information about odor or taste of this species.
spores	The spores of Amanita ifeifensis measure (10.4) 11.3 - 12.6 (-15.0) × (5.2-) 5.3 - 6.0 (-7.5) μm and are inamyloid and elongate to cylindric (rarely ellipsoid). Clamps are not found at bases of basidia.
discussion	This species is only known from Osun State, Nigeria where it is associated with a leguminous tree that is mycorrhizal. We have seen only one specimen of this mushroom, and it was not fully mature. This may affect microscopic measurements such as size of the spores.
brief editors	RET

name

Amanita ifeifensis

author

Tulloss, S. D. Russell & Alofe

name status

nomen provisorum

english name

"Ife-Ife Ringless Amanita"

etymology

Ife-Ife + -ensis, occuring in

GenBank nos.

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accession	locus	voucher	source



MN727374	nrLSU	27.x.2003 F. V. Alofe #2 (RET 329-7)	S. D. Russell et al., Purdue Univ.

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. Molecular data are courtesy Stephen D. Russell, Purdue University.

stipe

universal veil as saccate volva, membranous, tubular, apparently attach to lower sides of stipe (not just at base).

odor/taste

record not available.

macrochemical
tests

record not available.

hymenial trama

bilateral, divergent.

subhymenium

probably immature in this material, shallow, perhaps only one layer of inflated cells below longest basidia, nearly subparenchymtous in some regions of section, with clear branching structure and less inflation of cells in other regions.

basidia

41 - 56 × 9.5 - 10.5 μm, 4-sterigmate, arising from branching structure of inflated cells and short uninflated cells [note: material seems not completely mature.—ed.]; clamps very rare if present.

universal veil

On pileus: with plentiful gelatinized elements still clearly intimately attached to pileipellis.

stipe context

longitudinally acrophysalidic; dominantly hyphal at surface, dominantly acrophysalidic in context; filamentous undifferentiated hyphae 1.9 - 7.6 μm wide, partially gelatinized near stipe surface, branching; acrophysalides 152 - 292 × 20 - 36 μm; vascular hyphae 2.6 - 13.7 μm with insoluble content, relatively common, especially near surface, scattered, rarely branched; clamps rare if present (not observed).

lamella edge tissue

sterile; subparenchymatous in side view; filamentous undifferentiated hyphae infrequent on surfaces; inflated cells in ca. 7 layers, thin-walled or with wall up to 0.5 μm thick, 13.5 - 28 × 10.0 - 27 μm, globose to pyriform to subglobose to ellipsoid, in chains of up to six or more.

basidiospores

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RET: [40/1/1] (10.4) 11.3 - 12.6 (-15.0) × (5.2-) 5.3 - 6.0 (-7.5) μm, (L = 12.0 μm; W = 5.8; Q = (1.39-) 1.91 - 2.26 (-2.40); Q' = 2.09), hyaline, colorless, thin-walled, smooth, inamyloid, elongate to cylindric (rarely ellipsoid), adaxially flattened; apiculus sublateral, elongate to cylindric, occasionally constricted, occasionally expanded at one end; contents monoguttulate, with or without additional small granules; color in deposit not recorded.

ecology

Associated with Brachystegia eurycoma (Fabaceae subgenus Caesalpinioideae), a mycorrhizal leguminous tree.

material examined

NIGERIA: OSUN STATE—Ife-Ife, Obafemi Owolowo State Univ., Parks and Gardens Unit, 27.x.2003 F. V. Alofe #2 (RET 329-7, nrITS & nrLSU seq'd.)

discussion

In evaluating the microscopic data, it should be noted that only one exsiccatum was available and that it was not fully mature. Hence, for example, the spores and the lamella trama were viewed in sections taken near the stipe-end of a lamella—the most mature area. Whether these obsevations would be identical to those from more mature material is not clear.

The nrLSU 5' motif (TCTGACCTCAAATCA...) places this species in the provisional "subsection Penetratrices". Among the nearly sixty species with this motif, the present one is the only one known to bear spores with Q' > 2.0.

The only other species in the Penetratrices with a techtab (Amanita sp-N58) has a maximum Q value of 1.81.

Unfortunately because of difficulties with original documentation, it is not possible to connect this collection with more macroscopic information than can be deduced from the exsiccatum. To this we can add both anatomical data from my 2003 examination of the specimen and rDNA sequence data.

citations

—R. E. Tulloss

editors

RET

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name	Amanita ifeifensis
name status	nomen provisorum
author	Tulloss, S. D. Russell & Alofe
english name	"Ife-Ife Ringless Amanita"

name	Amanita ifeifensis

name	Amanita ifeifensis

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