| name | Amanita sp-Ridley-pekeoides-friable-volva | ||||||||
| name status | cryptonomen temporarium | ||||||||
| GenBank nos. |
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| 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 (Ridley 1991) and original research of R. E. Tulloss. The group of "friable volva individuals" of A. pekeoides sensu Ridley (1991) was identified by Ridley with A. punctata sensu G. Stev. Note: Portions of the following macroscopic description in square brackets are taken from notes on a paratype that RET has not reviewed [New Zealand, Nelson Lakes Nat. Pk., Rotoiti, 5.iii.1955 G. Stevenson 969 (K)]. These notes were taken by Dr. Ridley and kindly provided by him. | ||||||||
| pileus | 31 - [70] mm wide in exsiccata, dark brown to grayish brown; context not described; margin pectinate (0.25R - 0.35R in exsiccata), nonappendiculate; universal veil absent or as numerous, confluent, friable, patches (PDD 32108, specimen B), grayish sepia to dark grayish sepia fresh, reddish brown in exsiccatum. | ||||||||
| lamellae | [free, moderately crowded,] white, with grayish tones in exsiccata, marginate (with margin brown vinaceous to dark grayish sepia) and with dark edge easily seen in exsiccata; lamellulae not described, absent in those portions of exsiccata where obervation possible (PDD 32108, specimen A), but “intercalaries” mentioned in Dr. Ridley’s notes on Stevenson 969. | ||||||||
| stipe | up to 118 × 5 mm in exsiccata, dark brown, in exsiccata dark brown in upper two thirds and paler reddish brown in lower third (above remains of universal veil), narrowing upward[, sometimes with point on base]; context not described; exannulate; universal veil as incomplete ring or very short limb less than 10 mm from stipe base (PDD 31276), apparently white or quite pallid at first, becoming grayish sepia to dark grayish sepia [to sepia gray] except at very base of stipe and there remaining pallid [or becoming mouse gray] in exsiccata, occasionally also deposited in small patch (e.g., 6.5 × 2.5 mm in exsiccatum of PDD 31276) slightly higher on stipe than ring/limb cited. | ||||||||
| odor/taste | not recorded. | ||||||||
| macrochemical tests |
none recorded. | ||||||||
| pileipellis | 70 - 110 µm thick, gelatinizing only at surface or to depth of less than 10 µm, with upper most 10 - 15 µm colorless, with remainder orange-brown to red-brown; filamentous undifferentiated hyphae 2.8 - 7.0 µm wide, branching, dominantly subradially arranged, occasionally at other angles, closely packed; vascular hyphae 4.8 - 18.2 µm wide, branching, sinuous, common, locally plentiful, locally tangled. | ||||||||
| pileus context | filamentous undifferentiated hyphae 2.5 - 5.5 µm wide, branching, common to plentiful, singly and in fascicles, interwoven in very sparse lattice; acrophysalides dominating, thin-walled, broadly clavate to clavate to subfusiform, up to 113 × 40 µm or larger; vascular hyphae 3.8 - 17.0 µm wide, sinuous, locally in tangles, common. | ||||||||
| lamella trama | bilateral, divergent; central stratum collapsed in material examined; subhymenial base not distinguishable in material examined; filamentous undifferentiated hyphae 3.0 - 8.2 µm wide, branching, occasionally with yellowish subrefractive walls (but these possibly from invasive mold); terminal, divergent inflated cells not observed; vascular hyphae not observed. | ||||||||
| subhymenium | ?pseudoparenchymatous; parameters unmeasurable in material examined; with two to three cells below bases of longest basidia/-oles and three to six cells below bases of shortest basidia/-oles, with cells smallest near bases of basidia/-oles, with larger cells up to 21 × 16.0 µm [but these possibly(?) in central stratum], with basidia arising from inflated cells (dominantly) and (occasionally) from short partially inflated hyphal segments. | ||||||||
| basidia | 41 - 66 × 9.8 - 25 µm, with those of greater width having balloon-like apical portions, dominantly 4-, but also 2- and 1-sterigmate, with sterigmata up to 6.5 × 2.5 µm; clamps not observed. | ||||||||
| universal veil | On pileus (PDD 32108, specimen B): as gelatinized lumps of reddish brown tissue; filamentous undifferentiated hyphae 2.5 - 7.5 µm wide, branching, plentiful, singly and in fascicles, collapsing, partially gelatinized; inflated cells colorless to slightly sordid to reddish brown, clavate to broadly clavate to ellipsoid to subglobose to globose, up to 90 × 52 µm, dominating, terminal singly, thin-walled, collapsing, partially gelatinizing; vascular hyphae not observed. On lower stipe, exterior surface: probably dominated by hyphae, collapsed and gelatinized, red-brown. On lower stipe, interior: filamentous undifferentiated hyphae 2.8 - 10.0 µm wide, branching, plentiful, singly and in fascicles, interwoven in rather sparse lattice; inflated cells dominating, terminal singly [or in chains per Ridley (1991: 333)], thin-walled, pale brown, broadly subfusiform to clavate to broadly clavate to ellipsoid to subglobose, up to 77 × 62 µm; vascular hyphae not observed. On lower stipe, inner surface: like interior, but slightly gelatinized. | ||||||||
| stipe context | longitudinally acrophysalidic; filamentous undifferentiated hyphae 2.0 - 6.0 µm wide, branching, plentiful, often in fascicles; acrophysalides plentiful, dominating away from exterior surface, occasionally broadly rounded at base, with thin walls, up to 343 × 51 µm; vascular hyphae 8.0 - 13.2 µm wide, common near (concentrated at) surface, locally tangling, occasionally branching. | ||||||||
| partial veil | absent. | ||||||||
| lamella edge tissue | sterile; red-brown layer up to 140 µm thick, at first dominated by inflated cells (up to 47 × 35 µm) in eight or more layers but these extensively gelatinizing and depigmenting, then dominated by densely packed, interwoven, filamentous undifferentiated hyphae in layer 15 - 20 hyphal diameters thick, not so strongly gelatinizing. | ||||||||
| basidiospores | [80/3/2] (10.5-) 11.0 - 14.0 (-21.2) × (10.0-) 10.2 - 13.5 (-20.0) μm, (L = 12.2 - 12.3 μm; L’ = 12.3 μm; W = 11.6 - 11.8 μm; W’ = 11.7 μm; Q = (1.0-) 1.02 - 1.09 (-1.13); Q = 1.04 - 1.06; Q’ = 1.05), hyaline, colorless, smooth, with walls slightly thickened or up to 0.7 µm thick or (occasionally) thin, inamyloid, globose to subglobose, at least somewhat adaxially flattened; apiculus sublateral, cylindric to truncate-conic, prominent; contents granular to multiguttulate to monoguttulate with additional small granules; color in deposit not recorded | ||||||||
| ecology | Solitary to subgregarious. Under Nothofagus fusca and N. menziesii or under N. menziesii or under N. solandri var. | ||||||||
| material examined |
NEW ZEALAND: NORTH ISLAND—Gisborne Region - Urewera Nat. Pk., Mokau Track, 24.iii.1974 B. & S. Kendrick & J. M. Dingley s.n. (paratype of A. pekeoides, PDD 32108). SOUTH ISLAND—Nelson Region - Maruia, 27.iii.1970 R. F. R. McNabb s.n. (paratype of A. pekeoides, PDD 31276). Should also obtain 14.ii.1982 Taylor 1171, 17.iv.1987 G. M. Taylor s.n. [Ridley 528], and 5.iii.1955 G. Stevenson 969 (K). Note that Ridley 528 is not a paratype of A. pekeoides; but, according to Geoff, is listed in the accessory publication mentioned on the second page of the protolog. | ||||||||
| discussion |
Having a nonmembranous universal veil dominated by inflated cells is sufficient to segregate these paratypes as a species distinct from A. pekeoides. In addition, the “individuals with with friable volva” differ from A. pekeoides in the following:
Among taxa examined, the most similar is A. sororcula Tulloss et al. from Andean Colombia. However, this species has
Unfortunately, both collections of “individuals with friable volva” examined were somewhat damaged by mold. Since this material undoubtedly represents a new species, additional well-annotated and well-dried collections of this entity are necessary in order to have a suitable type collection. | ||||||||
| citations | —R. E. Tulloss | ||||||||
| editors | RET | ||||||||
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