| name | Amanita sp-N61 | ||||||||||||||||||||||||||||||||
| author | Tulloss | ||||||||||||||||||||||||||||||||
| name status | cryptonomen temporarium | ||||||||||||||||||||||||||||||||
| GenBank nos. |
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| holotypes | double click in markup mode to edit. | ||||||||||||||||||||||||||||||||
| 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 original research of R. E. Tulloss. | ||||||||||||||||||||||||||||||||
| pileus | 60 -82 mm wide, color in button unknown, at start of sporulation moderately saturated slightly grayish red-brown or medium brown over disc and gradually becoming tan then beige then pale beige toward margin, broadly companulate then convex to planoconvex, sometimes umbonate, tacky and shiny when moist, matte when dry; context 4± mm thick over stipe, whitish to off-white for the most part, not discoloring after exposure, narrowing (?)evenly toward margin for up to ca. 55 - 65% of pileus radius, then membranous; margin nonappendiculate, striate (0.15 - 0.45R); universal veil absent or as unevenly distributed occasional thin white to gray flakes or small patches, smooth, membranous, with underside pale tan at first, at first detersile, sometimes becoming glued to pileus surface, often with raised or distinctly upcurved edges. | ||||||||||||||||||||||||||||||||
| lamellae | free, without decurrent tooth on stipe, subcrowded to crowded, cream in mass, white to off-white in side view, 3.5 - 6 mm broad; lamellulaeae truncate to rounded truncate to subattenuate to attenuate, of diverse lengths, unevenly distributed, apparently infrequent in some exsiccata. | ||||||||||||||||||||||||||||||||
| stipe | 80 - 130 × 6 - 7 mm, white or whitish or pale orangish tan for most of length, white inside universal veil, becoming brownish where handled, narrowing upward, slightly flaring at apex, with upper 30± mm pulverulent and concolorous with ground color, below pulverulent region with some raised fibrils where handled or with such fibrils in light yellow-brown to medium brown snakeskin pattern, with pattern becoming darker toward stipe base (possibly from handling), with lowest 50± mm undecorated; context offwhite except pale orangish white near stipe surface, no bruising or staining observed, stuffed with white cottony material, with central cylinder 2± mm wide; with larval tunnels not observed; exannulate; universal veil as thin membranous saccate volva, originally white, becoming pale gray to gray with age, sometimes staining rusty orange, asymmetrically divided around stipe base, tearing and fragmenting with age, with highest point on fragment 12 - 27 mm from stipe base, with greatest width 8.5 - 11 mm, less than 1 mm thick, attached only at stipe base, with no apparent internal limb. | ||||||||||||||||||||||||||||||||
| odor/taste | Odor indistinct. Taste not recorded. | ||||||||||||||||||||||||||||||||
| macrochemical tests |
none recorded. | ||||||||||||||||||||||||||||||||
| lamella trama | bilateral, divergent; filamentous undifferentiated hyphae ??; inflated cells ??; vascular hyphae 4.0 - 5.3 μm wide, common at least locally. | ||||||||||||||||||||||||||||||||
| partial veil | absent. | ||||||||||||||||||||||||||||||||
| lamella edge tissue | sterile. | ||||||||||||||||||||||||||||||||
| basidiospores | RET: [20/1/1] (8.5-) 9.0 - 12.2 (-14.2) × (6.5-) 7.2 - 10.7 (-11.6) μm, (L = 10.3 μm; W = 9.2 μm; Q = (1.08-) 1.10 - 1.30 (1.40); Q = 1.18), hyaline, colorless, smooth, thin-walled, subglobose to broadly ellipsoid, infrequently ellipsoid, adaxially flattened; apiculus sublateral, cylindric; contents monoguttulate with additional small granules; color in deposit not recorded. | ||||||||||||||||||||||||||||||||
| ecology | Solitary or as a pair. In dark loam or in dark loam of mixed forest with Fagus, Quercus, Tsuga canadensis, and Pinus. | ||||||||||||||||||||||||||||||||
| material examined | U.S.A.: CONNECTICUT—Middlesex Co. - Moodus, 22.viii.2008 Bill Yule s.n. [RET 8-22-08-F] (RET 421-6, nrITS and nrLSU seq'd.); Salmon River St. For (W sect.) [41.5492° N/ 72.4514° W, 37 m], 28.viii.2009 Linda s.n. (RET 437-10, nrITS seq'd.). New London Co. - Colchester, Day Pond [41.5569° N/ 72.4183° W, 134 m], 31.vii.2015 J. Wheeler s.n. [Tulloss 7-31-15-L] (RET 703-7, nrITS & nrLSU seq'd.) | ||||||||||||||||||||||||||||||||
| discussion |
The present species is known from three
collections. The species was segregated by
it unique nrITS sequence. Morphologically, it appears to be related the group of taxa including A. rhacopus. Based on derivation of a sequence from its nrITS locus, it appears strongly genetically differentiated from all taxa of sect. Vaginatae having sequences presently deposited in GenBank. It is also strongly differentiated genetically from all non-GenBank-deposited data in the RET herbarium. The same level of genetic separation (a minimum of over 2%) is also true for the nrLSU sequence derived from the A. sp-N61 collection. The spore size and shape of the present species are compare to those of Amanita rhacopus and A. texasorora in the following sporograph: The reader may also wish to compare the present taxon with Amanita sp-V03 and Amanita sp-58. The collection RET 437-10 is mentioned in RET's older notes as "Amanita homolae_cf04". | ||||||||||||||||||||||||||||||||
| citations | —R. E. Tulloss | ||||||||||||||||||||||||||||||||
| editors | RET | ||||||||||||||||||||||||||||||||
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