Amanita sp-N19

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name	Amanita sp-N19
name status	cryptonomen temporarium
author	Tulloss
intro	This provisional taxon was originally based on a collection from the northeastern U.S., and all collections that have been placed in it since have been from a region extending from Connecticut to New Hampshire. Collections attributed to another provisional taxon A. sp-S01 have been made in the same region, and the question arises as to whether an inappropriate distinction has been made. See also ?Amanita russuloides.
cap	The cap of this species is 38 - 62 mm wide, yellowish with darker disc, tacky to viscid, and shiny. The striations on the cap margin extend to about 20 to 30% of the cap's radius. The cap often bears thin and narrow patches of white or whitish volva.
gills	The gills are free to narrowly adnate, subcrowded to crowded, pale yellowish white to cream in mass, and white in side view. The short gills are truncate to rounded truncate.
stem	The stuffed or solid stem of A. sp-N19 is 54 - 87 × 6 mm, white and may turn brown from handling. Its flesh is white and unchanging when cut or bruised. It bears a bulb that is 15 - 19 × 11 - 14 mm and is ovoid to ellipsoid. There is a small, whitish, membranous ring on the stem somewhere between mid-stem and about one-third of the stem's length from its top. The ring usually collapses on the stem or disappears completely. The white volva takes the form of a very narrow thin collar or a membranous flap of tissue arising from the bulb with the flap's upper tip up to 25 mm above the bottom of the bulb.
odor/taste	The odor has been described as "fungoid" or lacking.
spores	The spores of A. sp-N19 measure (8.8-) 9.5 - 11.5 (- 13.2) × (6.0-) 6.5 - 7.8 (-8.0) µm and are ellipsoid to elongate and inamyloid. Clamps are probably absent from bases of the basidia.
discussion	On the taxon page for A. russuloides, the reader will find a brief discussion of the problem of the actual number of gemmatoid taxa in eastern North America.—R. E. Tulloss
brief editors	RET

name

Amanita sp-N19

author

Tulloss

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



No data available in table

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 by R. E. Tulloss.

pileus

38 - 62 mm wide, yellowish with darker disc, tacky to viscid, shiny; context white, brownish to somewhat yellowish in disc, 3 - 4 mm thick at stipe, thinning evenly for about 80% of radius, then a membrane; margin striate (0.2 - 0.35R), nonappendiculate; universal veil white, unchanging when cut or bruised, as thin and narrow patches, subfloccose to floccose to floccose-felted, detersile, sometimes absent.

lamellae

free to narrowly adnate, with or without decurrent line on stipe apex, subcrowded to crowded, pale yellowish white to cream in mass, white in side view, unchanging when cut or bruised, 3 - 5.5 mm broad; lamellulae truncate to rounded truncate, ??.

stipe

54 - 87 × 6 mm, white, browning from handling, narrowing upward, flaring at apex, longitudinally striatulate, finely fibrillose below; context white, unchanging when cut or bruised, brownish in larva tunnels, solid or stuffed with white cottony material, with central cylinder 1.5^± mm wide; bulb 15 - 19 × 11 - 14 mm, ovoid to ellipsoid; partial veil small, whitish, membranous, submedian or superior (then about one third of stipe length from apex), collapsing on stipe or ephemeral; universal veil in a very narrow thin collar or limbate, if limbate then tip of limb up to 25 mm from bottom of bulb, white.

odor/taste

Odor fungoid to lacking. Taste not recorded.

macrochemical
tests

none recorded.

basidia

35 - 59 × 10.0 - 12.5 μm, ??, projecting up to 15.0 μm beyond surrounding basidioles; clamps ??.

basidiospores

send to graphing tool

[40/2/2] (8.8-) 9.5 - 11.5 (- 13.2) × (6.0-) 6.5 - 7.8 (-8.0) µm; L = 10.4 - 10.7 µm; L’ = 10.6 µm; W = 6.8 - 7.2 µm; W’ = 7.0 µm; Q = (1.31-) 1.38 - 1.72 (-1.83); Q = 1.48 - 1.53; Q’ = 1.50), thin-walled, smooth, hyaline, colorless, inamyloid, ellipsoid to elongate; apiculus sublateral, cylindrical to truncate conic; contents guttulate; ?? in deposit.

ecology

Solitary. New Hampshire: In sandy loam in northern hardwoods-hemlock forest (Tsuga canadensis dominant, with some Quercus). Rhode Island: In sandy soil under Pinus strobus.

material examined

U.S.A.: CONNECTICUT—New Haven Co. - Gilford, 19.ix.1998 William Yule s.n. [Tulloss 9-19-98-F] (RET 288-4; nrITS < 200 bp). MASSACHUSETTS— Worcester Co. - S of Leominster, Leominster St. For., 13.viii.1993 Brian Gottlieb s.n. [RET 8-13-93-C] (RET 095-5). NEW HAMPSHIRE—Cheshire Co. - Wantastiquet St. For., 19.viii.1989 Roger Phillips s.n. [Tulloss 8-19-89-F] (RET 022-7). RHODE ISLAND—Washington Co. - Kingston, Univ. of Rhode Island, campus, 4.viii.1988 NEMF1988 participant s.n. [Tulloss 8-4-88-C] (RET 239-5; nrITS < 200 bp)).

discussion

A number of our collections formerly listed under sp-N19 have been sequenced. As in other cases of temporary codes that were infrequently used over a number of years, "sp-N19" proves to have been used inconsistently in the field—before spore measurements or DNA sequencing could be applied.

The original collections were intended to cover a species that was a candidate for being A. russuloides. The fact that some of the sp-N19 material (RET 288-4 and RET 239-5) turns out to have DNA that has an ITS2 locus matching that of Amanita sp-N60 is, therefore, not surprising.

Because sp-S01 rarely yields a complete nrITS without the use of bacterial cloning, we have been unable to get sequences long enough for deposit in GenBank. We will re-submit samples in the future; and it is possible that the present entity will be merged with Amanita sp-N60 in the future.

citations

—R. E. Tulloss

editors

RET

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name	Amanita sp-N19
name status	cryptonomen temporarium
author	Tulloss

name	Amanita sp-N19

name	Amanita sp-N19

Spore data for collections
provisionally identified as: Amanita sp-N19 Tulloss

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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stirps Eliae
2

species eliae
2

stirps Gemmata
4

Spore Measurements by Collection

1↓ stirps Eliae2

species eliae2

stirps Gemmata4

Amanita sp-N19

Spore Measurements by Collection

1↓
stirps Eliae
2

species eliae
2

stirps Gemmata
4