This description is taken from the original description of Bas
The cap of A.
crebresulcata is 50 - 75 mm wide, glabrous,
campanulate with a rather acute umbo in young specimens,
plano-convex to flat or plano-convace with low obtuse
umbo in older specimens, with a broad, densely
sulcate-striate margin (45 - 65% of the radius). The cap
is dark umber to fuscous-sepia at the umbo and somewhat
paler away from the umbo.
The gills are free, crowded, narrow, and white. The short gills are truncate
and rather scarce.
The stem is up to 120 × 10
mm, tapering upward, hollow, without a bulb, gray, white
at the base, often paler at the apex, glabrous, smooth,
and exannulate. The saccate volva is membranous, thin,
narrowly sheathing, white to cream, and minutely felted.
The spores from the
original material measured (8.0-) 8.5 - 10.5 (-11.0) × (6.5-) 7.0 - 8.5 (-9.0)
µm and are subglobose to broadly ellipsoid (rarely
ellipsoid) and inamyloid. Clamps are absent at the bases of basidia.
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INPA; isotype, L
Wartchow and Costa Maia. 2007. Hoehnea 34(2): 131-134.
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
The same field may also contain black text, which is data from a revision of the present
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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 the protolog and from (Wartchow and Costa Maia 2007).
A recent revision by Wartchow and Costa Maia (2007) is avaible as a PDF. (open)
from the protolog: [70/7/4] (8.0-) 8.5 - 10.5 (-11.0) × (6.5-) 7.0 - 8.5 (-9.0) μm, (Q = (1.05-) 1.10 - 1.40; Q = 1.15 - 1.30), colorless, hyaline, thin-walled, smooth, inamyloid, subglobose to broadly ellipsoid to ellipsoid; apiculus [drawn as] subapical, cylindric; contents usually as "one large oil-drop"; color in deposit not recorded.
from type study in (Wartchow and Costa Maia 2007): [15/1/1] (7.5-) 8.0 - 10.0 × (6.5-) 7.0 - 8.5 μm, (L = 8.9 μm; W = 7.6 μm; Q = 1.11 - 1.25 (-1.30); Q = 1.17).
from Pernambuco material in (Wartchow and Costa Maia 2007): [40/2/1] (7.5-) 8.0 - 10.5 (-11.5) × 7.0 - 9.0 (-9.5) μm, (L' = 9.1 μm; W' = 8.2 μm; Q = (1.06-) 1.10 - 1.26 (-1.33); Q' = 1.20), hyaline, colorless, thin-walled, smooth, inamyloid, subglobose to broadly ellipsoid, infrequently ellipsoid;, apiculus sublateral; contents as large guttule; color in deposit not recorded.
"Fairly common on the ground in mixed secondary growth tropical rain forest, growing near Neea (Nyctaginaceae; in one case mycorrhizal connections definitely established) and Psychotria (Rubiaceae); also present [were] Sapindaceae, Euphorbiaceae, Leguminosae, Palmae, Flacourtiaceae, Sapotaceae, and Violaceae."
Wartchow & Costa Maia (2007): "isolated on soil in tropical rain forest."
from protolog: BRAZIL: AMAZONAS—Manaus, ca. INPA [3°05'45" S/ 59°59'16" W], 19.v.1977 R. Singer B9680 (holotype, INPA 66.710; isotype, L), 20.v.1977 R. Singer B9684 (paratype, INPA 66.713), 27.v.1977 R. Singer B9729 (paratype, INPA 66.711), 1977 R. Singer B9796 (paratype, INPA 66.712, with color slide).
Wartchow and Costa Maia (2007: BRAZIL: AMAZONAS—Manaus, ca. INPA [3°05'45" S/ 59°59'16" W], 19.v.1977 R. Singer B9680 (holotype, INPA 66.710). PERNAMBUCO—Igarassu,
Usina São José (Mata dos Macacos), 29.vii.2005, F. Wartchow 27/2005 (URM).
A recent revision by Wartchow and Costa Maia (2007) is avaible as a PDF. (open)—R. E. Tulloss and F. Wartchow
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