name | Amanita tullossiana | ||||||||||||||||
author | Mehmood, Iqbal Hosen, K. Das, and R. P. Bhatt. 2018. MycoKeys 37: 79. | ||||||||||||||||
name status | nomen acceptum | ||||||||||||||||
english name | "Himalayan Gray Dust Lepidella" | ||||||||||||||||
etymology |
Tulloss + -ianus, a possesive form; hence,
"of Tulloss" or "Tulloss'"; named in honor of Rodham E.
Tulloss [Note: The name should not be confused with A. tullossii Guzmán & Ram.-Guill., a probable posterior synonym for A. jacksonii.—ed.] | ||||||||||||||||
MycoBank nos. | 822821 | ||||||||||||||||
GenBank nos. |
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holotypes | RET 717-4 | ||||||||||||||||
lectotypes | CAL 1611 | ||||||||||||||||
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 directly from the protolog of the present taxon. Basidiomes medium-sized to large. | ||||||||||||||||
pileus | protolog: 90 - 170 mm wide, initially hemispherical then convex to plano-convex and finally planar, shiny, slightly viscid when moist, ash gray (1B2), pastel grey (1C1), grey (4B1-4C1), brownish gray, brownish-beige (6F2-3) to dark grey (1F1), slightly darker at center; context 11 - 14 mm thick above stipe, white (1A1), thinning evenly toward margin, unchanging when cut or bruised; universal veil as floccose to subfelted pulverulent patches, dark grey (1F1) to brownish-grey (6F2), greyish-black to dark grey (1F1), soft, up to 4 mm thick, 7 - 12 mm wide, irregularly distributed. | ||||||||||||||||
lamellae | protolog: free to narrowly adnate, crowded, white (1A1), unchanging when injured, 6 - 10 mm broad, 8 - 9 per cm at pileus margin; lamellulae attenuate or truncate, plentiful, of several lengths. | ||||||||||||||||
stipe | protolog: 150 - 185 × 20 - 25 mm (excluding bulb), attenuate upwards, with upper part covered by dark grey (1F1) fibrils, lower part covered with recurved scales, with fibrils turn blackish when handled; context solid, white, unchanging on cutting or bruising; partial veil superior, soft, cottony, white, easily collapsing or deciduous; bulb 70 - 88 × 25 - 41 mm, napiform to rooting; universal veil covering bulb with brownish gray (6F2) to dark gray (1F1) remnants, often causing grey (4B1) to dark grey (1F1) recurving scales on upper bulb. | ||||||||||||||||
odor/taste | protolog: Odor indistinct. Taste not recorded. | ||||||||||||||||
macrochemical tests |
protolog: 5% KOH - negative on pileus. 2% phenol - negative [on pileus and in stipe context]. FeSO4 crystals - negative on pileus and in stipe context. | ||||||||||||||||
pileipellis | protolog: 140 - 195 μm thick, in two layers; suprapellis 45 - 55 μm thick, gelatinized colorless; subpellis 95 - 140 μm thick; filamentous, undifferentiated hyphae 2 - 6 μm wide, densely arranged in subpellis, with yellowish-brown intracellular pigment; vascular hyphae 7–10 μm wide, infrequent. | ||||||||||||||||
pileus context | protolog: filamentous, undifferentiated hyphae 2 - 6 μm wide, thin-walled, hyaline, interwoven; broadly clavate to ellipsoid acrophysalides 86 - 130 × 26 - 45 μm, thin-walled, hyaline. | ||||||||||||||||
lamella trama | protolog: bilateral, divergent; wcs= 60 - 80 μm; well-rehydrated; filamentous, undifferentiated hyphae 3 - 8 μm wide; with lateral stratum composed of intercalary inflated cells 66 - 110 × 12 - 19 μm wide; vascular hyphae 9 - 14 μm. | ||||||||||||||||
subhymenium | protolog: 40 - 50 μm thick, with 3–4 layers of inflated cells, wst-near = 35–50 μm, wst-far= 50–70 μm, with basidia arising from small inflated cells 8 - 15 × 6 - 10 μm wide. | ||||||||||||||||
basidia | protolog: 45 - 55(–65) × 9 - 14 μm, 2 to 4-sterigmate, thin-walled; sterigmata up to 4 μm long; clamps not observed after extensive search. | ||||||||||||||||
universal veil | protolog: Universal veil on pileus: disordered; filamentous, undifferentiated hyphae 2–6 μm wide, branched, thin-walled, infrequent to scattered, with pale yellow vacuolar pigments; inflated cells dominantly globose to subglobose 25 - 88 × 22 - 70 μm, infrequent, broadly ellipsoid to ellipsoid or pyriform 40 - 60 × 10 - 13 μm, often in chains of 2–3, with brownish to pale yellow vacuolar pigments; vascular hyphae 6 - 12 μm wide, frequent. Universal veil on stipe base: disordered; filamentous, undifferentiated hyphae 2–5 μm wide, branched, thin-walled, scattered, with pale yellow vacuolar pigments; inflated cells dominantly globose to subglobose 30 - 70 × 25 - 65 μm, infrequent broadly ellipsoid to elongated cells 30 - 90 × 12 - 18 μm, with brownish to pale yellow vacuolar pigments; vascular hyphae 10 - 14 μm wide, often present. | ||||||||||||||||
stipe context | protolog: longitudinally acrophysalidic; filamentous, undifferentiated hyphae 5 - 7 μm wide; acrophysalides 150 - 230 × 35 - 56 μm, thin-walled, colorless, hyaline, vascular hyphae not found. | ||||||||||||||||
partial veil | protolog: inflated cells abundant, broadly clavate to clavate 50 - 120 × 16 - 29 μm, thin-walled, colorless, hyaline, sometimes with yellowish-brown vacuolar pigments; filamentous, undifferentiated hyphae 3 - 7 μm wide, dominant, thin walled, hyaline, colorless or sometimes with yellowish-brown pigments; vascular hyphae 4 - 8 μm wide. | ||||||||||||||||
lamella edge tissue | protolog: sterile; inflated cells dominating, globose to subglobose (20 - 35 × 15 - 25 μm) or clavate to subclavate (40 - 50 × 15 - 18 μm). | ||||||||||||||||
basidiospores | protolog: [300/15/10] (8.5–) 9 – 13 (–13.5) × (5.8–) 6 – 8 (–8.5) μm, [L = 9.5 – 11 μm; L' = 10.5 μm; W = 6–7.5 μm; W' = 6.83 μm; Q = (1.29–)1.40–1.66(–1.83), Q = 1.38–1.59, Q' = 1.54], hyaline, thin-walled, smooth, amyloid, ellipsoid, infrequently broadly ellipsoid or elongate; contents monoguttulate; apiculus lateral to sublateral, up to 1 μm long; white in deposit. | ||||||||||||||||
ecology | protolog: Solitary to subgregarious. At 2350-2655 m elev. In temperate mixed forest of Quercus semicarpifolia and Abies pindrow. | ||||||||||||||||
material examined | protolog: INDIA: UTTARAKHAND—Rudhraparyag Distr. - Baniyakund [30.4833° N/ 79.1776° E, 2655 m], 26.viii.2014 T. Mehmood TM 14-475 (holotype, RET 717-4; isotype, CAL 1611), 14.vii.2015 T. Mehmood TM 15-624 (paratype, GUH-M-27002), 1.viii.2015 T. Mehmood TM 15-786 (paratype, GUH-M-27003), 2.viii.2015 T. Mehmood TM 15-815 (paratype, GUH-M-27004), 8.viii.2015 T. Mehmood TM 15-891 (paratype, GUH-M-27005), 30.viii.2015 T. Mehmood TM 15-1017 (paratype, GUH-M-27006), 22.vii.2016 T. Mehmood TM 16-1123 (paratype, GUH-M-27007), 26.viii.2016 T. Mehmood TM 16-1369 (paratype, GUH-M-27008); Nainital Distr., Mukteshwar 24.viii.2016 T. Mehmood TM 16-1338 (paratype, GUH-M-27009). | ||||||||||||||||
citations | —T. Mehmood, Md. Iqbal Hosen, K. Das, & R. P. Bhatt | ||||||||||||||||
editors | RET | ||||||||||||||||
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