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Rhodocybe mellea var. depressa M.D. Xavier, Silva-Filho & Wartchow var. nov. (Figs. 2���4) MycoBank:��� MB 842858. Type:��� BRAZIL. Para��ba, Mamanguape, Reserva Biol��gica Guaribas, SEMA II, 23 July 2019, F. Wartchow, FW 08/2019 (holotype UFRN-Fungos 3386!; isotype JPB) Diagnosis:��� Rhodocybe mellea var. depressa is distinguished by its depressed pileus; the presence of abundant and conspicuous sclerobasidia; small, flexuous-cylindrical pseudocystidia; pileipellis a smooth two-layered cutis; sandy soil habitat; and unique nuclear ITS and LSU sequences. Description:���Basidiomata collybioid(Fig.2a). Pileus 13���35 mm broad, convex with a depressed center, becoming plane and depressed, brownish orange (OAC 729), paling to yellowish orange (OAC 791); surface dry, hygrophanous; margin entire to slightly sulcated, decurved to straight, sometimes lobed; context fleshy, 1 mm thick, cream (OAC 791), unchanging. Lamellae adnexed with a decurrent tooth, moderately close to close, cream-orange (OAC 717); 2���4 mm broad, margin slightly eroded to wavy, concolorous with sides; lamellulae of varying lengths. Stipe 21���30 �� 2���7 mm, equal to slightly enlarged at the base, terete when young, becoming compressed, sometimes slightly flexuous, cream-orange (OAC 717); surface dry, smooth to slightly pruinose; consistency cartilaginous; context solid, fibrous, dark cream (OAC 793); spore print not obtained; odor and taste not determined. Basidiospores 5.2���6.5 �� 4.1���5.4 (5.8 �� 0.30 �� 4.7 �� 0.28 ��m), E = (1.05)1.12���1.38, Q = 1.25, n = 60/2, subglobose to broadly ellipsoid, very rarely globose in profile view, angular in polar view with 7���9 angles, undulate-pustulate in all views, lacking a suprahilar plage, thin-walled, hyaline (Figs. 3b ��� 4a). Basidia 22.4���30 �� 7.4���8.1 ��m clavate, 4-spored, thin-walled, hyaline, some with yellowish contents in KOH 5%; sterigmata 4.5���5 ��m long; sclerobasidia abundant, 4-spored, broadly clavate, 23.6���34.4 �� 5.1���8.1 ��m, with walls up to 1.2 ��m thick (Figs. 3a,c; 4b). Pleurocystidia as pseudocystidia 26.5���41 �� 5.2���7.3 ��m, originating from the subhymenium, mostly not conspicuously projecting from hymenium, flexuous-cylindrical with rounded to aculeate apex, thin-walled, with pale yellow amorphous contents in KOH 5% (Figs. 3a ��� 4c). Lamellae edge mixed composed of a few basidia and abundant pseudo-cheilocystidia, similar to the pseudo-pleurocystidia. Subhymenium ramose. Lamellar trama regular, composed of cylindrical hyphae, 4.1���7.3 ��m wide, thin-walled, hyaline; oleiferous hyphae present, abundant. Pileus trama subregular, composed of cylindrical hyphae, 3.3���6.1 ��m wide, hyaline, thin-walled and smooth; oleiferous hyphae present, abundant, 2.3���3.7 ��m wide. Pileipellis a cutis composed of two layers, golden yellow in KOH 5% (Fig. 3d): suprapellis as a more separate layer with cylindrical entangled periclinal hyphae, thin-walled, smooth, and cylindrical-clavate terminal hyphae with rounded to inflated apex, 2.5���3.1 ��m wide (Fig. 4d); subpellis a layer with strongly entangled periclinal hyphae, thin-walled and smooth. Stipitipellis a cutis of parallel hyphae, 3.6���6.4 ��m wide, thin-walled to slightly thick-walled, and smooth. Caulocystidia absent. Clamp connections absent in all examined tissues. Etymology:���The name ��� depressa ��� comes from the Latin and refers to the depressed pileus. Habitat:���Saprotrophic, gregarious, growing on sandy soil among leaf litter. Coastal tableland landscape with Brazilian Savanna (Cerrado) vegetation (Fig. 2b). Distribution:���Known only from the type locality. Material examined:���The type., Published as part of Xavier, Miguel D., Silva-Filho, Alexandre G. S., Wartchow, Felipe & Baseia, Iuri G., 2022, Fine-scale diversity in Rhodocybe mellea (Entolomataceae, Basidiomycota), with a description of a new variety and notes on sclerotia formation in Rhodocybe, pp. 87-99 in Phytotaxa 538 (2) on pages 92-94, DOI: 10.11646/phytotaxa.538.2.1, http://zenodo.org/record/6333654

Brazil has a rich biodiversity, but many species remain to be discovered, studied and cataloged. In the Paraíba State, taxonomy studies on agaric fungi are still infrequent. Thus, this present work carried out a bibliographic review of fungal species belonging to orders Agaricales, Boletales, Cantharellales Gomphales and Russulales from the Paraíba State previously described or mentioned, because the knowledge about the fungal diversity in the region still remain disaggregated and poorly known. Thus, we organize and present information about the geographic distribution of the taxa in this checklist format. For the compilation of the results, for each species we present the published herbarium numbers and their respective citations. As results, we found 79 taxa belonging 41 genera, 22 families and five orders occurring in areas of the Atlantic Forest and Caatinga. So, this review is extremely important for the dissemination of the valuation of the State’s biodiversity providing information about our Brazilian biomes. RESUMO O Brasil possui uma rica biodiversidade, por isso existem muitas espécies a serem descobertas, estudadas e catalogadas. No Estado da Paraíba, ainda são poucos os estudos envolvendo taxonomia. Com isso, o trabalho realizou um levantamento bibliográfico das espécies fúngicas do Estado da Paraíba já descritas ou citadas, pois o conhecimento sobre a diversidade de fungos que possuímos ainda é muito desagregado e pouco conhecido. Dessa forma, organizamos e apresentamos informações sobre a distribuição geográfica dos táxons em formato de check list. Para a compilação dos resultados, para cada espécie apresentamos os números de tombamento do herbário publicados e suas citações. Como resultado, listamos 79 táxons pertencendo a 41 gêneros, 22 famílias e cinco ordens ocorrendo em áreas de Mata Atlântica e Caatinga. Sendo assim, este trabalho é de extrema importância para a avaliação da biodiversidade do Estado providenciando informação acerca os biomas brasileiros.

Nasl. z nasl. zaslona. Opis vira z dne 12. 1. 2021. Bibliografija: str. 297-299.