taxonID	type	description	language	source
03BFB20CFF90FF8CFF7BBF80FB53F9D7.taxon	etymology	Etymology: — Named after its morphological closeness with the taxon Agaricus duplocingulatus. Diagnosis: — Differs from Agaricus duplocingulatus by its smaller pileus (22 – 32 mm), much smaller stipe (20 – 25 mm), absence of catenulate cheilocystidia, somewhat longer basidiospores (6 – 8 × 3.5 – 4.5 μm), and 11 positions in the entire nrDNA ITS sequences. Holotype: — INDIA. West Bengal: East Midnapur district, Ramnagar, Kasafaltalya, 21 ° 43 ′ 29.9 ″ N, 87 ° 31 ′ 36.6 ″ E, 10 m elev., 23 June 2016, E. Tarafder & A. K. Dutta, CUH AM 537. Description: — Fruit - body small to medium-sized, agaricoid. Pileus 22 – 32 mm diam., convex when young, becoming applanate at maturity with a shallow central depression, surface dry, appressed squamulose, arranged in concentric manner throughout the entire pileus on a white to cream background, surface turns yellow with KOH, negative in Schäffer’s reaction, squammules light brown (6 E 4) to brownish grey (10 D 2, 6 E 2) or greyish brown (6 E 3) towards margin, margin non-striate when young, faintly striate on extreme maturity, incurved, partial veil present, flappy membranous, white (1 A 1), context white to cream, fleshy, fibrous, unchanging when bruised but turning brownish beige (6 E 3) with KOH. Lamellae 2 – 3 mm broad, free, pinkish white (10 A 2) to pink (12 A 4) when young, becoming greyish brown (8 D 3) to brownish grey (8 D 2) on maturity, dark brown (6 F 8) to coal black (5 H 2) on drying, crowded with 2 – 4 series of lamellulae, edges discolorous, even. Stipe 20 – 25 × 2 – 4 mm, tapered at apex, base ca. 7 mm broad, surface white (1 A 1) when young, grey (5 C 1 - 6 D 1) to brownish grey (5 C 2 - 6 D 2) on age, turns brownish on bruising, silky fibrillose to slightly pruinose, fistulose to hollow, fleshy fibrous, base with white (1 A 1) rhizomorphs. Annulus present, double edged, the upper one membranous, lower one fugacious, white (1 A 1). Odour mild phenolic. Taste unknown. Basidiospores (6 –) 6.5 – 7.5 (– 8) × 3.5 – 4.2 (– 4.5) μm [X m = 6.9 ± 0.5 × 4.0 ± 0.3, Q = 1.6 – 1.9, Q m = 1.7 ± 0.1, n = 30 spores from each of the collected two specimens], ellipsoid, light brown (6 D 5, 6 D 6) to brown (6 E 6, 6 E 7), smooth, amyloid, metachromatic in cresyl blue, thick-walled (up to 1.4 μm). Basidia 14 – 21 × 6 – 7 μm, clavate to broadly clavate, smooth, hyaline, 4 - spored, sterigmata 1.5 – 2.5 μm long. Basidioles (11 –) 13 – 14 (– 16) × 5.5 – 6.5 (– 7.5) μm, clavate, smooth, hyaline, thin-walled. Lamellae edge fertile with well-developed cheilocystidia. Cheilocystidia 17 – 25 × 8 – 11 μm, pyriform, mostly vesiculose, sometimes broadly clavate, hyaline, smooth, thin-walled. Pleurocystidia absent. Pileipellis a cutis, composed of 3.5 – 13 μm broad, short terminal inflated hyphal elements, cylindrical to palisade in shape, hyaline in KOH, thin-walled. Pileus trama hyphae 7.5 – 10 μm broad, cylindrical, hyaline, thin-walled. Lamellae trama regular, hyphae 7 – 12 μm broad, hyaline, thin-walled. Stipitipellis hyphae 2.5 – 5.5 μm broad, light yellowish with KOH, thin-walled. Stipe trama regular, hyphae 6.5 – 12 μm broad, cylindrical, thin-walled. Caulocystidia absent. Clamp - connections absent. Habit and habitat: — solitary or in a group of two, on soil and associated with stone chips, under angiospermous trees. Additional specimen examined: — INDIA. West Bengal: East Midnapur District, Ramnagar, Kasafaltalya, 21 ° 43 ′ 04.8 ″ N, 87 ° 31 ′ 38.2 ″ E, 8 m elev, 12 June 2017, E. Tarafder & A. K. Dutta, CUH AM 602.	en	Tarafder, Entaj, Dutta, Arun Kumar, Sarkar, Jit, Acharya, Krishnendu (2018): A new species of Agaricus sect. Brunneopicti from Eastern India. Phytotaxa 374 (2): 139-146, DOI: 10.11646/phytotaxa.374.2.5, URL: http://dx.doi.org/10.11646/phytotaxa.374.2.5
