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Page number:1008 
Remarks (internal):At first sight Entoloma terreum reminds of a Pouzarella species with its inocybeoid habit and dark colours. However, the microscopy with small spores, clamped basidia, lack of necropigmented hymenial elements, and non-encrusted hyphae of stipitipellis, place it in sect. Hispiduli. Entoloma sanvitalense differs by having a pronouncedly translucently striate pileus, larger spores, and lack of smell. 
Description type:Original description 
Description:Entoloma terreum Esteve-Rav. & Noordel., sp. nov. (fig. 340)
Habit Inocybeoid. Pileus 8-15 mm, conico-campanulate with obtuse umbo and slightly involute margin, not expanding, hygrophanous, not translucently striate, blackish-grey slightly pallescent to cinereous-grey on drying (resembling Tricholoma terreum), entirely radially fibrillose with aeriferous fibrils, glabrescent with age. Lamellae, L = 20-25, distant, adnexed, ascending, ventricose, greyish with slightly paler edge. Stipe 15-25 x 1.5-3 mm, progressively enlarged towards base, curved towards base, fistulose, cinereous-grey, longitudinally striate, densely aeriferously fibrillose. Context greyish. Smell rancid-farinaceous when cut.
Spores 7.8-9.0 x 6.5-7.3 µm, Q = 1.15-1.3, 5-6-angled in side view with rather obtuse angles. Basidia 4-spored, clamped. Lamella edge fertile, cystidia absent. Hymenophoral trama regular, made up of long, parallel, narrow elements, more than 100 µm long. Pileipellis a cutis with transitions to a trichoderm, made up of, up to 10 µm wide hyphae; subpellis poorly differentiated with up to 20 µm wide elements. Pigment brown, incrusting. Stipitipellis a cutis with transitions to a trichoderm, made up of cylindrical hyphae with abundant free, cylindrical to narrowly clavate terminal endings with smooth walls. Clamp-connections present in hymenium, elsewhere absent.
Habitat and distribution: terrestrial in subalpine heath with Calluna vulgaris, Vaccinium myrtillus and Erica australis subsp. aragonensis on poor, acid soil (type), and in subalpine pasture on calcareous soil.
 
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