| name | Amanita madagascariensis | ||||||||||||||||||||
| author | L.P. Tang, Zhu L. Yang and B. Buyck. 2015. Mycol. Progress 14(39): 9, fig. 6, pl.1. | ||||||||||||||||||||
| name status | nomen acceptum | ||||||||||||||||||||
| english name | "Madagascar Ringed Ringless Amanita" | ||||||||||||||||||||
| etymology | Madagascar + i + ensis, originating in. | ||||||||||||||||||||
| MycoBank nos. | 811214 | ||||||||||||||||||||
| GenBank nos. |
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| holotypes | PC | ||||||||||||||||||||
| 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 directly from the protolog of the present taxon. NOTE: Spore measurements from papers by Z. L. Yang use "Times New Roman" face symbols for "Q" and "Q'"—respectively, " protolog: Basidiome medium-sized. | ||||||||||||||||||||
| pileus | protolog: 30 - 70 mm wide, white or dirty white to greyish (1A1; 2A1), dull; context not described; margin indistinctly striate (0.1-R); universal veil as pyramidal to subpyramidal or subconical warts, 2 −3 mm high, greyish to brownish grey (2B2; 2C3−2C4; 3B1; 3C4). | ||||||||||||||||||||
| lamellae | protolog: free, crowded, white; lamellulae truncate. | ||||||||||||||||||||
| stipe | protolog: 30 - 65 × 4 - 6 mm, white to whitish (1A1; 2A1), nearly cylindrical, hollow; partial veil submedian to superior, white to whitish, membranous. universal veil greyish to brownish grey, as small, brownish to brownish grey warts or patches irregularly distribuated, adnate to stipe base, occasionally in incomplete rings. | ||||||||||||||||||||
| odor/taste | neither recorded. | ||||||||||||||||||||
| macrochemical tests |
none recorded. | ||||||||||||||||||||
| pileipellis | protolog: 360–430 μm thick: suprapellis 140 - 170 μm thick, more or less gelatinized, with filamentous hyphae 3 - 5 μm wide and predominantly radially arranged, colorless, hyaline; subpellis 220–260 μm thick, ungelatinized, with filamentous hyphae 5 - 7 μm wide, more or less radially arranged, pale yellowish vacuolar pigment. | ||||||||||||||||||||
| pileus context | protolog: filamentous hyphae 3 - 5 μm wide, dominating, loosely interwoven; inflated cells 45 - 90 × 40 - 20 μm, locally abundant, ovoid to broadly clavate to clavate, thin-walled; vascular hyphae scarce or absent. | ||||||||||||||||||||
| lamella trama | protolog: bilateral; with mediostratum and lateral strata consisting of cylindro-clavate to clavate to fusiform to subfusiform, abundantly inflated cells 65 - 85 × 12 - 16 μm mixed with thin-walled, colorless and hyaline, 4 - 6 μm wide filamentous hyphae; vascular hyphae rare or absent. | ||||||||||||||||||||
| subhymenium | protolog: comprising 3 (-4) layers of irregular subglobose cells 10 - 14 × 8 - 12 μm. | ||||||||||||||||||||
| basidia | protolog: 50 - 65 × 10 - 12 μm, usually 4-sterigmate, with sterigmata 4 - 6 μm long; clamps not observed. | ||||||||||||||||||||
| universal veil | protolog: On pileus, upper part of wart: filamentous hyphae 5 - 7 μm wide, abundant, thin-walled or with walls up to 0.5 μm thick, branched, colorless, hyaline; inflated cells abundant, mostly subglobose to ellipsoid, 30 - 55 × 15 - 30 μm, terminal singly or in chains of 2 - 4; vascular hyphae rare. On pileus, lower part of wart: similar to upper part, but with inflated cells rare. On stipe base: filamentous hyphae 4 - 6 μm wide, very abundant, densely arranged, with walls up to 1 μm thick, colorless and hyaline, frequently septate e; inflated cells 16 - 50 × 10 - 40 μm, locally fairly abundant to rare; vascular hyphae 10 - 12 μm wide, rare. | ||||||||||||||||||||
| stipe context | protolog: longitudinally acrophysalidic; acrophysalides dominating, 90 - 220 × 20 - 40 μm; filamentous hyphae 3 - 10 μm wide. | ||||||||||||||||||||
| partial veil | protolog: filamentous hyphae 3 - 8 μm wide, dominating, thin-walled, colorless, hyaline; inflated cells fairly abundant locally, subglobose to ellipsoid, 35 - 70 × 18 - 35 μm, terminal singly or in short chains; vascular hyphae rare. | ||||||||||||||||||||
| lamella edge tissue | not described. | ||||||||||||||||||||
| basidiospores |
protolog: [140/7/3]
11 - 14 (-15) × (5-) 6 - 8 (-9) μm,
( | ||||||||||||||||||||
| ecology | protolog: Solitary or in small group. By roadside with planted eucalypts. | ||||||||||||||||||||
| material examined | protolog: MADAGASCAR: Eastern escarpment, Andasibe [S 18°94′27.06″ E 48°41′71.38″, 1000 m], 21.ii.1997 B. Buyck, Moreau & Eyssartier 97.560 (paratype, PC 0084419), 97.543-a (paratype, PC 0084420), 97.543-b (holotype, PC 0084421). | ||||||||||||||||||||
| discussion |
At present, A. madagascariensis is known only
from Madagascar. In the protolog, the present species is shown to form a sub-basal clade of section Vaginatae in an nrLSU tree. The reader may wish to review this tree. The authors indicate that the level of support for relationships within this clade are not high. It is intriguing that the present species along with an unnamed African taxon and an African species identified by the authors as A. strobilaceovolvata appear in this clade. All three members have a universal veil with a warted surface; and all three members of the clade are annulate species of section Vaginatae that share absence of clamps with all other Vaginatae. It is possible that the present species could have been introduced to Madagascar with the eucalypt that is the only known associate of A. madagascariensis. "However, according to Buyck (2008) and his unpublished molecular data, Cantharellus Adans. ex Fr. and other ectomycorrhizal fungal species associated with eucalypts in Madagascar are African in origin rather than of Australian origin. It is possible that a host shift of ectomycorrhizal fungi has occurred (Tedersoo et al. 2007)." | ||||||||||||||||||||
| citations | —L. P. Tang, Z. L. Yang, B. Buyck, and R. E. Tulloss | ||||||||||||||||||||
| editors | RET | ||||||||||||||||||||
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