| name | Amanita volvarielloides | ||||||||
| author | B. J. Rees in B. J. Rees et al. 2009. Australasian Mycologist: 28: 26. | ||||||||
| name status | insufficiently known | ||||||||
| MycoBank nos. | 513335, 540290 | ||||||||
| GenBank nos. |
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| holotypes | UNSW | ||||||||
| intro |
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 material. 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. The following material is derived from the protolog. The idiosyncratic methodology employed in the protolog make necessary an extensive revision of the holotype in order to provide an understanding of this species. | ||||||||
| pileus | from protolog: 45 - 55 mm wide at maturity, light ochraceous to pale, grayish fawn (5A-B3), with vaguely metallic sheen, circular to oval, broadly convex, with slight umbo, dry, not hygrophanous, smooth to vaguely radially fibrillose; margin infrequently short striate in older basidiome; universal veil as white, flat sheets over large areas of pileus surface. | ||||||||
| peridium | double click in markup mode to edit. | ||||||||
| lamellae | from protolog: adnexed, moderately close, creamy white, thin, "irregular", with intervenations, with "particulate faces," with edges ragged and concolorous; lamellulae in two series, "most nearly meeting" stipe, with "occasional short one at margin." | ||||||||
| stipe | from protolog: 35 - 40 × 8 - 10 mm [with length including bulb], white, central to slightly eccentric, separating easily from pileus, slightly flattened, narrowing downward to bulb apex, apex covered in small scales; context hollow, with central cylinder filled with white fibrous material; bulb [present, subglobose to ovoid in illustration]; partial veil not apparent, "but with dirty, grayish yellow, universal veil remains appressed to the stipe just above" tbasal bulb; universal veil "well-developed saccate, wrinkled volva." | ||||||||
| odor/taste | not recorded. | ||||||||
| macrochemical tests |
none recorded. | ||||||||
| pileipellis | not described. | ||||||||
| pileus context | not described. | ||||||||
| lamella trama | not described. | ||||||||
| subhymenium | from protolog: "sub-basidial cell not especially swollen." [Note: no illustrations of any anatomy of the lamellae are provided except for a grouping of cells called "facial lamella cells"—a phrase that I've not previously seen in the description of an agaric.—RET] | ||||||||
| basidia | from protolog: 28 - 30 × 10 - 13 μm, clavate, 4-sterigmate, with sterigmata up to 5.0 μm long; clamps not observed at the base. [Note: The absence of clamps at the base of the basidia is questionable because clamps are reported elsewhere in the basidiome—see data on the universal veil anatomy, below. To date, in hundreds of species examined, there is no known case in which clamps are present in basidiomes of a species and are not present at the bases of the basidia in basidiomes of that species. Of course, there is also the possibility that the clamps found elsewhere on tissue that was foreign to the mushroom.—RET] | ||||||||
| universal veil | from protolog: On the pileus: filamentous, undifferentiated hyphae much wider than 4.2 μm, "including intercalary and clavate to crescent-shaped terminal cells 8.5 - 14.5 μm wide. No free cells present. [Note: In the illustration of universal veil material from the pileus, there is included a hypha with very frequent septa that is probably from a foreign spore that germinated on the pileus from which the universal veil was sampled. This hypha or one similar to it is probably the source of this element of the description that RET removed from the above: "narrow, segmented hyphae 3.5 - 4.2 μm wide, broken up into short cells, together with..." A crescent-shaped cell is very unlikely in the volva of an amanita; the cell viewed was probably damaged as are all but one of the cells shown in the illustration of the universal veil cited above.—RET] From the upper free edge of limbate volva: "Cells ... interwoven, and extremely long," as on the pileus, "but with thicker walls and abundant clamp connections." | ||||||||
| stipe context | not described. | ||||||||
| partial veil | reportedly absent in holotype. | ||||||||
| lamella edge tissue | from protolog: filamentous undifferentiated hyphae not described; inflated cells 25 - 30 × 10 - 13 μm, broadly clavate. [Note: Two cells are illustrated. In aging material such as is illustrated in the protolog, many of the deciduous marginal cells may have collapsed and disappeared.] | ||||||||
| basidiospores | from protolog: [30/3/2] 8.7 - 10.3 × 7.8 - 9.0 μm, (Q = 1.01 - 1.25), "weakly amyloid"; apiculus very prominent; contents granular with large central spherical guttule; color in deposit not recorded. [Note: From numerous indications in the article, the authors are apparently unfamiliar with describing Amanita morphology. Hence, we are especially cautious about excepting the idea of amyloid spores in section Amanita. Since the drawings of spores which are provided do not show the spores in lateral view, we are concerned that dimensions and Q values for the spores may be somewhat in error. The editors are at a loss to interpret the information provided about the number specimens from which spores were measured as they seem to imply that there was a second collection revised; however, no collection other than the holotype is mentioned in the protolog. The photograph of the holotype collection shows two basidiomes, not three.—RET] | ||||||||
| ecology | from protolog: In sandy soil of open Eucalyptus and Allocasuarina woodland, most closely associated with the latter. | ||||||||
| material examined | from protolog: AUSTRALIA: NEW SOUTH WALES—Wedderburn, 2.iv.2003 B. J. Rees et al. s.n. (holotype, UNSW 2003/29). | ||||||||
| discussion |
The authors apparently relied upon molecular methods to determine the species as an Amanita and to place the species within section Amanita because the morphological information provided in the protolog does not establish placement in the Amanitacaeae. The editors have attempted to give probable meanings to the idiosyncratic description of microscopic anatomy. This species must be considered insufficiently known. The specimens illustrated with photographs in the article appear to be abnormal and probably were drying in situ when collected. The editor is not sure what is meant by "facial lamella cells." The written description suggests that they are either basidioles or cells from the lamella marginal tissue that were deposited on the hymenial surface during sectioning. The illustration provided for such cells suggest the latter for the most part. | ||||||||
| citations | —R. E. Tulloss | ||||||||
| editors | RET | ||||||||
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