The editors of this site owe a great debt to Dr. Cornelis Bas
whose famous cigar box files of Amanita nomenclatural information
gathered over three or more decades were made available to RET for computerization
and make up the lion's share of the nomenclatural information presented on this site.
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.
The following text may make multiple use of each data field.
The field may contain magenta text presenting data from a type study
and/or revision of other original material cited in the protolog of the present taxon.
Macroscopic descriptions in magenta are a combination of data from the protolog and
additional observations made on the exiccata during revision of the cited original
The same field may also contain black text, which is data from a revision of the present
taxon (including non-type material and/or material not cited in the protolog).
Paragraphs of black text will be labeled if further subdivision of
this text is appropriate.
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.
Because of the invalidity of the original publication the protolog of this taxon is divided into two parts published in 1987 and 1998. The following material is derived from the two parts of the protolog unless a different source is cited.
protolog p.p. (1987): snow white, campanulate, satiny (but not silky), with an exaggerated umbo; margin not described; context white at first, becoming reddish brown when exposed to air; universal veil absent.
[The exaggerated umbo suggests that the type specimen may be malformed or attacked by some other organism. This could also lead to the very small spores reported for this species.—ed.]
protolog p.p. (1987): ??; bulb ??; context as in pileus; partial veil fragile, tearing, deciduous; universal veil ??.
protolog p.p. (1987): KOH or NaOH soln. - yellow on pileipellis.
Wieland Test for amatoxins - positive.
Test voucher: holotype.
[Note: There is insufficient data to support a sporograph. The only species with spores this small are found in dense tropical forest (Tulloss, 2005). As noted above, the editor is concerned that the holotype does not represent a normal state of this species.—ed.]
protolog p.p. (1987): In marginal zone of mixed woods.
protolog p.p. (1987): SPAIN: GALICIA—Pontevedra - Vigo, La Madroa, 28.x.1984 Jaime Diz s.n. (holotype, ??).
[Despite an illustration that shows no basal bulb on the stem and the failure to report whether the spores of the present species are reactive with Melzer's Reagent, the classification of this species in Amanita and the reports that the pileipellis produces a yellow reaction to a strong base and that the Wieland test for amatoxins was positive leads us to place this taxon in Amanita sect. Phalloideae. Indeed, the authors of the 1987 article provide no information that clearly establishes that the species is in the Amanitaceae. Except for spore measurements no microscopic anatomy was provided in the 1987 portion of the protolog. No DNA sequence derived from A. porrinensis has been located.—ed.]
—R. E. Tulloss
Information to support the viewer in reading the content of "technical" tabs
can be found here.
Freire & Castro ex Castro
Spore data for collections provisionally identified as: Amanita porrinensis Freire & Castro ex Castro
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.