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Page number:466 
Remarks (internal):Pouzarella fusca is diagnosed by the dark gray to dark blackishbrown to black coloration when young, a pileus that is initially squamulose on the disc and imbricate squamulose near the margin, only slightly nodulose 6-8 angled basidiospores averaging 10.0 x 7.3 µm, caulocystidia of two types (cylindro-clavate or napiform to clavate), and abundant aborted basidia.
The distinctive features of P. fusca are not found in any other Pouzarella species. Entoloma romagnesii described from France has similarly shaped and sized basidiospores but has a dark yellow-brown pileus and stipe, broadly ellipsoid to clavate cheilocystidia, and non-encrusted pileus and stipe hairs (Noordeloos 1979).
See P. setiformis for comparisons with other Australian entolomatoid fungi similar to P. fusca,.
Description type:Original description 
Description:Pouzarella fusca Largent & Abell-Davis, sp. nov. Plates 15-16
MycoBank MB 519573
Pileus 3.5-10 mm broad, 1.5-3.0 mm high, consistently convex, minutely but entirely squamulose, erect in the center, imbricate squamulose elsewhere, becoming appressed squamulose at the very margin, black to a very dark gray brown (not matching any color to Kornerup & Wanscher (1978), fading to dark gray-brown (6F3) except a medium gray-brown (6E-F3) on the margin, dull, opaque, not hygrophanous, not striate; trama dark gray to black, less than 0.5 mm thick above the stipe; margin slightly incurved to decurved, entire. Taste mild. Odor somewhat pungent. Lamellae 2.5-3.5 mm long, 0.5-1.0 mm high, concolorous with the pileus, adnate, subdistant and narrow; margin smooth and concolorous. Lamellulae 3 (2 short, 1 medium) between lamellae. Stipe 8-17 mm long, 0.8-2.0 mm broad, equal, dark gray (6F1), minutely and entirely squamulose to covered with loose fibrils; basal tomentum scarce, strigose base present. Bruising reaction absent.
Basidiospores distinctly angular to slightly nodulose, in profile view typically 6-angled, often 7-8-angled, nearly or definitely heterodiametric, 8.6-11.5 x 6.1-8.7 µm (xm = 10.0 ± 0.8 x 7.3 ± 6 µm; E = 1.22-1.54; Q = 1.38 ± 0.09 (heterodiametric); n = 28/1). Basidia 4-sterigmate, sterigma rather long, 4.2-5.5 µm; clavate, origin unusual for entolomatoid fungi, originating from a basal cell in the subhymenium, 33.9-47.2 x 8.9-12.6 µm (E = 2.8-4.7; Q = 3.83); base 3.0-6.5 µm. Pleurocystidia absent. Pseudocystidia absent. aborted basidia abundant, but scattered on the lamellae, clavate, often with aborted sterigma, not projecting beyond the hymenium and filled with opaque contents that stain reddish-brown in 3% KOH, 35.0-44.6 x 8.7-13 µm (xm = 40.9 x 11.0 µm; E = 3.1-4.6; Q = 3.78; n = 7/1). Hyphae of the lamellar trama rather short, 29.6-179.0 x 4.7-11.0 µm. Pileipellis 240-400 ?m deep, composed of chains of cells, erect or suberect, on or near the disc and towards the margin, becoming repent at the margin. Pileocystidia clavate to broadly cylindric, 36.5-118.9 x 5.2-21.4 µm (E = 2.6-6.1; Q = 5.04). Hyphae of the pileal trama rather short, 45.5-105.4 x 2.1-8.0 µm. Stipitipellis similar to the pileipellis and composed of solitary caulocystidia. Caulocystidia of two types; cylindro-clavate and the terminal cells comprised of a loosely entangled hyphae, 20.8-73.2 x 4.7-10.9 µm (E = 3.6-8.1; Q = 5.53), and clavate to broadly napiform and the terminal cells comprised of solitary hyphal walls and in clusters with the hyphae originating from a common base, 22.3-57.7 x 9.1-14.3 µm (E = 1.7-5.4; Q = 2.71). Hyphae of the stipe trama parallel to subparallel, 60.5-336.3 x 4.5-12.5 µm. Oleiferous hyphae rare in the trama of the stipe, pileus and lamellae. Lipoid bodies present in the basidia, absent in the aborted basidia and tramal hyphae of the pileus, lamellae and stipe. Pigmentation externally incrusting the hyphae of the basal portion of the pileipellis and stipitipellis and distinct and strong on the tramal hyphae of the lamellae, pileus and stipe; suggestively externally incrusting the outer hyphal and more obviously parietal on the inside the hyphal walls of the terminal 2-3 cells of the pileipellis and stipitipellis, including the pileocystidia and the caulocystidia.
Ecology and distribution: Scattered or connate in dark soil on high banks along road just above bridge at end of Davies Creek Road in a simple to complex notophyll vine forest, Dinden National Park.
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