| name | Amanita privigna |
| name status | nomen acceptum |
| author | Corner & Bas |
| english name | "Step Daughter Death Cap" |
| intro |
This description is based on the original one of Corner and Bas (1962). |
| cap |
The cap of Amanita privigna is 50 - 60 mm wide, becoming subumbonately plano-convex, livid, umber, fuliginous umber at the center, paler and finely innately streaked toward margin, slightly viscid, smooth, glabrous, with a smooth margin. The cap flesh is white, fairly firm, 4 - 5 mm thick in center, and thinning toward the margin. |
| gills |
The gills are free, rather crowded, narrow, white, and becoming pale cream. |
| stem |
The stem is 50 - 60 × 10 -12 mm, white with small, pale gray, floccose-scurfy patches or fibrils, and pure white at the apex. The volva is 8 - 12 mm high, white at the base, and rather firm. |
| spores |
The spores measure 7.4 - 9.0 × 6.7 - 8.5 µm and are globulose to subglobulose (sometimes broadly ellipsoid). Clamps were not observed at bases of basidia. |
| discussion |
The present species was originally described from a single specimen collected in Singapore. The authors of the species suggest comparisons to A. fuliginea Hongo and A. alauda Corner & Bas. No associated plants were reported.—R. E. Tulloss |
| brief editors | RET |
| name | Amanita privigna | ||||||||||||||||||||
| author | Corner & Bas. 1962. Persoonia 2: 281. | ||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||
| english name | "Step Daughter Death Cap" | ||||||||||||||||||||
| etymology | privigna "stepdaughter"; "the species being poorly endowed with characteristic features" (Corner & Bas 1962: 281) | ||||||||||||||||||||
| MycoBank nos. | 326110 | ||||||||||||||||||||
| GenBank nos. |
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| holotypes | L | ||||||||||||||||||||
| 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 entirely from the protolog of the present taxon. | ||||||||||||||||||||
| pileus | from protolog: 50 - 60 mm wide, livid umber, fuliginous umber in center, paler and more finely innately streaked toward margin, becoming subumbonately plano-convex, slightly viscid, smooth: context white, fairly firm, 4 - 5 mm thick over stipe, gradually thinning toward margin; margin nonstriate; universal veil absent. | ||||||||||||||||||||
| lamellae | from protolog: free, rather crowded, white, becoming pale cream, narrow, 3 - 4 mm wide, with 70 primaries; lamellulae obliquely truncate to attenuate, with 1 - 3 between each pair of otherwise adjacent lamellae. | ||||||||||||||||||||
| stipe | from protolog: 50 - 60 × 7 - 8 mm (width measured at apex), white, pure white at extreme apex, subcylindric, with small pale gray floccose-scurfy patches or fibrils above and below partial veil; bulb 10 - 12 mm wide; context white; partial veil 8 - 12 mm broad, pendant from about 10 mm below apex of stipe, membranous, gray, finely striate on upper side, smooth on underside, fairly firm and persistent; universal veil 8 - 12 mm high, with lower third attached to subbulbous base of stipe, with upper two- thirds forming slightly spreading fleshy-membranous limb split into four parts, mostly pale gray, white at base, rather firm, in dried specimen constricted at connection with stipe. | ||||||||||||||||||||
| odor/taste | Odor and taste not recorded. | ||||||||||||||||||||
| macrochemical tests |
none recorded. | ||||||||||||||||||||
| pileipellis | from protolog: gelatinized near surface; filamentous hyphae 2 - 6 µm wide, radially oriented, with pale brown intracellular pigment. | ||||||||||||||||||||
| pileus context | not described. | ||||||||||||||||||||
| lamella trama | not described. | ||||||||||||||||||||
| subhymenium | not described. | ||||||||||||||||||||
| basidia | from protolog: 4-sterigmate; clamps not observed. | ||||||||||||||||||||
| universal veil | from protolog: On stipe base, outer surface layer: filamentous hyphae interwoven, up to 5 µm wide, irregular. On stipe base [probably interior layer]: filamentous hyphae not described; inflated cells densely distributed, clavate, infrequently globose (e.g., 80 × 45 µm, 130 × 25 µm, 60 × 60 µm, etc.). | ||||||||||||||||||||
| stipe context | not described. | ||||||||||||||||||||
| partial veil | not described. | ||||||||||||||||||||
| lamella edge tissue | from protolog: inflated cells 20 - 45 × 10 - 40 µm, clavate or pyriform or globose, colorless, thin-walled, forming sterile edge or lamella. | ||||||||||||||||||||
| basidiospores | from protolog: [-/1/1] 7.4 - 9.0 × 6.7 - 8.5 μm, (Q = 1.0 - 1.20; Q = 1.05 - 1.10), hyaline, colorless, smooth, thin-walled, amyloid, globose to subglobose, sometimes broadly ellipsoid;apiculus proportionately small; contents cloudy vitreous; color in deposit unrecorded. [Fresh spores reported to measure 8.0 - 9.0 × 7.0 - 8.0 μm.] | ||||||||||||||||||||
| ecology | from protolog: Solitary. Terrestrial in forest. | ||||||||||||||||||||
| material examined | from protolog: SINGAPORE: Bukit Timah, 16.viii.1939 E. J. H. Corner s.n. (holotype, L). | ||||||||||||||||||||
| discussion |
from protolog: "The present species belongs to the dark-colored, volvate species with globose spores of section Phalloideae. Amanita fuliginea Hongo (1953: 69) from Japan is similar. However, an examination of authentic material of that species (Hongo 711, 4 Aug. 1953, Mii-dera, Otsu) kindly put at our disposal by Dr. T. Hongo, showed that the cuticle of that species is quite different, viz. only slightly gelatinized and with 5 - 8 (-18) µm wide, repent, subradial, dark brown hyphae. Moreover, the stipe of A. fuliginea is brownish squamulose-fibrillose, the volva is white, and the ring turns brownish. Amanita alauda Corner & Bas differs by the rather conspicuously streaked cuticle with 3 - 10 (-15) µm wide hyphae and the white stipe, ring, and volva." | ||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
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