Species of Entoloma (Entolomataceae) with cuboidal basidiospores from Brazil Author Karstedt, Fernanda Instituto de Botânica, Núcleo de Pesquisa em Micologia, Caixa Postal 68041, 04045 - 902 São Paulo, SP, Brazil Author Bergemann, Sarah E. Middle Tennessee State University, Biology Department, PO Box 60, Murfreesboro, TN 37132, USA. Author Gates, Genevieve 9 Winmarleigh Ave, Taroona, Tasmania, 7053, Australia. Author Ratkowsky, David Tasmanian Institute of Agriculture, Private Bag 98, Hobart, Tas. 7001, Australia. Author Cunha, Kelmer Martins 0000-0003-2140-9916 MIND. Funga / MICOLAB, Botany Department, Santa Catarina Federal University, 88040 - 900 Florianópolis, SC, Brazil. * Correspondence to: fernanda. karstedt @ gmail. com fernanda. karstedt @ gmail. com; https: // orcid. org / 0000 - 0003 - 2140 - 9916 sarah. bergemann @ gmail. com; https: // orcid. org / 0000 - 0001 - 7875 - 2040 ggggates @ gmail. com; https: // orcid. org / 0000 - 0002 - 9561 - 7788 d. ratkowsky @ utas. edu. au; https: // orcid. org / 0000 - 0002 - 7514 - 3570 kelmermartinscunha @ gmail. com; https: // orcid. org / 0000 - 0002 - 0545 - 5966 mcapelariibot @ yahoo. com; https: // orcid. org / 0009 - 0001 - 0737 - 3681 fernanda.karstedt@gmail.com Author Capelari, Marina Instituto de Botânica, Núcleo de Pesquisa em Micologia, Caixa Postal 68041, 04045 - 902 São Paulo, SP, Brazil text Phytotaxa 2024 2024-06-20 654 1 1 76 http://dx.doi.org/10.11646/phytotaxa.654.1.1 journal article 10.11646/phytotaxa.654.1.1 1179-3163 13217065 Entoloma mocamboense Karstedt & Capelari , sp. nov . Figs. 22 , 38f MB 838595 Etymology:— Mocamboense refers to the Mocambo Reserve where the species was collected. Diagnosis:— Entoloma mocambaense is characterized by the combination of a brownish beige-pink delicate basidiome with a strongly translucent-striate pileus, the presence of clavate cheilocystidia, and cuboidal basidiospores with scarcely elongated angles. Type :— BRAZIL . Pará : Belém , Mocambo Reserve , 22 February 2011 , F. Karstedt & E. Castro FK1899 ( Holotype , SP) . Description:— Pileus 13 mm diam., broadly conical, strongly translucent-striate, brownish beige-pink with brownish center and striae, hygrophanous, slightly adpressed-fibrillose, margin irregular and radially torn. Pileus context thin. Lamellae sinuate, ventricose, pink, distant, with lamellulae in two tiers, faces smooth, margins irregular, serrate. Stipe 45 × 1–2 mm , cylindrical, centrally attached, pinkish beige, slightly translucent, smooth, glabrous, adpressed-fibrillose with a silky aspect, hollow, with white basal tomentum. Stipe context translucent. Odor and taste not observed. Spore print pink, seen at the apex of the stipe. FIGURE 22. Entoloma mocamboense ( FK1899 ) : a . basidiospores; b . basidia; c . cheilocystidia. Scale: 10 µm. Basidiospores cuboidal with or without scarcely elongated angles, 4-angled in profile view, excluding the projections 6.2–8.7 × 7–8.7 µm [xm = 7.28 (± 0.61) × 7.85 (± 0.61) µm, Q = 1–1.4, Qm = 1.08 (± 0.11), n = 20], including the projections 7.5–10 × 7.5–11.2 µm [xm = 8.3 (± 2.5) × 9.14 (± 1) µm, Q = 1–1.33, Qm = 1.1 (± 0.11), n = 20], and diagonally 8.7–11.2 × 10–12.5 µm [xm = 10.37 (± 1) × 11 (± 1) µm, Q = 1–1.43, Qm = 1.06 (± 0.06), n = 20], thin-walled. Basidia clavate, 29–44 × 10–12.5 µm (n = 9), hyaline, thin-walled, 4-sterigmate. Cheilocystidia cylindrical, cylindro-clavate or clavate, 25–70 × 5–19 µm (n = 10), hyaline, thin-walled. Pleurocystidia and pseudocystidia absent. Lamellar trama of parallel, cylindrical or broadly cylindrical hyphae, 3.7–21 µm diam. (n = 21), hyaline, thin-walled, septa distant; sub-hymenium branched. Pileitrama not observed. Pileipellis formed by prostrate hyphae, cylindrical, 2.5–13.7 µm diam. (n = 20), hyaline, thin-walled, septa distant. Stipitipellis a cutis, hyphae cylindrical, 3.7–8.75 µm diam., with straw yellow intracellular pigment, thin-walled, septate (n = 20). Caulocystidia absent. Clamp connections present. Refractive hyphae present. Habitat:—Solitary, in soil with litter, in the domain of the Amazon Forest. Distribution:—Known only from the material collected in Belém, Pará . Comments:— Aside from the African species, E. roseomurinum (Romagn. & Gilles) Noordel. & Co-David (2009: 173) , E. mocambaense does not resemble any named species of Entoloma and differs from this species by the combination of a brownish beige-pink delicate basidiome with a strongly translucent-striate pileus, the presence of clavate cheilocystidia, and cuboidal basidiospores with scarcely elongated angles. It is placed in the /Cervinum subclade, along with other species having a delicate basidiome and cuboidal basidiospores with scarcely elongated angles.