name | Amanita myrmeciae | ||||||||||||||||||||||||
author | Tulloss, Kudzma & Albertella nom. prov. | ||||||||||||||||||||||||
name status | nomen provisorum | ||||||||||||||||||||||||
english name | "Bull Ants' Ringless Amanita" | ||||||||||||||||||||||||
etymology | "belonging to the Myrmecia ('Bull Ants')" | ||||||||||||||||||||||||
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 derived from collection annotations and photographs of L. Albertella, molecular studies of L. V. Kudzma, and other original research of R. E. Tulloss. | ||||||||||||||||||||||||
pileus | 62 mm wide, light brown to brown, convex, smooth, dull; context white except for narrow gray region immediately below pileipellis, 6 mm thick above stipe, thinning evenly for two-thirds to three-quarters of gill length from stipe, then membranous to pileus margin; margin striate (0.3±R), nonappendiculate; universal veil as single patch, membranous, white, detersile. | ||||||||||||||||||||||||
lamellae | free to receding, close, white to cream in mass, white in side view, projecting below edge of pileus, with white minutely fimbriate edge, 6.5 - 8.5 mm broad, broadest at one-third to one-half of length from stipe; lamellulae truncate to subtruncate, rather common (not between every pair of otherwise adjacent lamellae), of diverse lengths, unevenly distributed. | ||||||||||||||||||||||||
stipe | 56 × 8 mm, white, subcylindric, largely undecorated except for closely spaced lines of lamella edge material near apex; context stuffed with rather densely packed longitudinally oriented white fibrils, possibly becoming hollow, with central cylinder 1.5 mm wide; exannulate; universal veil as proportionately rather thick, cupulate/saccate volva, white, short and broad, flaring, 16.5 × 19 mm, with limb 1+ mm thick at mid-height. | ||||||||||||||||||||||||
odor/taste | Odor lacking. Taste not recorded. | ||||||||||||||||||||||||
macrochemical tests |
none recorded. | ||||||||||||||||||||||||
basidia | 50 - 59 × 15.5 - 18.0 μm, 4- and rarely 2-sterigmate, with sterigmata up to 6.5 × 2.5 μm, with basidia arising from ??. Clamps not observed at bases of basidia. | ||||||||||||||||||||||||
lamella edge tissue | sterile. | ||||||||||||||||||||||||
basidiospores |
RET: [11/1/1] (8.6-) 9.0 - 11.2 (-12.5) ×
(7.6-) 8.0 - 10.5 (-11.4) μm, (L =
10.6 μm; W = 9.6 μm; Q = 1.06 - 1.18;
Q 1.10), colorless, hyaline, thin-walled,
smooth, inamyloid, subglobose, adaxially flattened;
apiculus sublateral, cylindric;
contents mono- to multiguttulate; color in
deposit not recorded. [Note: The sole specimen from which spores were measured is immature (see "ecology" and "discussion" data fields, below) and spores might be expected to be larger or smaller in more mature material.—ed.] | ||||||||||||||||||||||||
ecology | RET: In soil in which Bull Ants (Myrmecia spp.) live, in lawn ca. 8 m from Eucalyptus. This species is a food sought out by the Bull Ants. Most basidiomes are eaten before they reach maturity. | ||||||||||||||||||||||||
material examined | RET: AUSTRALIA: NEW SOUTH WALES—City of Lithgow, Blue Mountains, Little Hartley [33.5599° S/ 150.2021° E, 821 m], 26.iii.2011 Lucy Albertella s.n. [mushroomobserver #64743] (RET 473-8, nrITS segm. & nrLSU seq'd.), 11.xii.2011 Lucy Albertella s.n. [mushroomobserver #84440] (RET 495-10, nrITS segm. & nrLSU seq'd.), 23.ii.2015 L. Albertella s.n. [mushroomobserver #199598] (RET 687-7, nrITS segm. & nrLSU seq'd.). | ||||||||||||||||||||||||
discussion |
The single specimen of RET 495-10
which is the basis of the above description was
incompletely mature when dried. This
makes the material
difficult to compare with the six species of section
Vaginatae described
by Wood (1997). We believe we have A. punctata sensu A. E. Wood from the same site as the present speciess and, hence, can say given our interpretation of Wood's species, the present species is distinct from it both morphologically and genetically. Amanita pallidobrunnea has broadly ellipsoid to ellipsoid spores; for this reason it is distinguishable from the present species. Amanita sordidobubalina is unusual among the Vaginatae treated by Wood because of having yellow tints to the pigment on the pileus. This also distinguishes A. sordidobubalina from A. myrmeciae. Amanita albovolvata has gills and volva that are or become gray; spores that are broadly ellipsoid to ellipsoid; and a stipe with gray, zebroid decoration. Amanita subvaginata sensu A. E. Wood is apparently a species of section Vaginatae rather than section Amanita, which is the probable home of the true species. ...t.b.d. Amanita vaginata sensu A. E. Wood has a cap dominated by shades of gray, larger spores, and a stipe that is longer and proportionately much narrower. RET 495-10 is immature and yielded only 11 measurable spores from two sections. This species is on of those in section Vaginatae that share an unusual 5'-motif for the nrLSU locus. The majority of agaricoid amanitas and some sequestrate species exhibit the most common for of this motif—TTGACCTCAAATCA. The variant motif for taxa of the above-cited group of taxa in the Vaginatae contains a single character, "C," between the first two characters of the dominant form—TCTGACCTCAAATCA. The reader may wish to refer to several other taxa of this morphologically diverse group: A. cinderella, A. chiricahuana, A. drummondii, A. minnesorora, A. penetratrix, etc. For the current list of taxa in this group, see the latter page. The species was previously given the temporary code name "sp-AUS06" on this site. RET 473-8 is immature (preserved as a barely opening button). | ||||||||||||||||||||||||
citations | —R. E. Tulloss, L. V. Kudzma, and L. Albertella | ||||||||||||||||||||||||
editors | RET | ||||||||||||||||||||||||
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