New genera, species, and combinations of Boletaceae from Brazil and Guyana

Brasilioporus olivaceoflavidus, gen. et sp. nov., Brasilioporus simoniarum, sp. nov., Neotropicomus australis, gen. et sp. nov., and Nevesoporus nigrostipitatus, gen. et sp. nov. (Boletaceae, Boletales, Basidiomycota), are described from the endangered Atlantic Forest biome of eastern Brazil. New combinations into these new genera are proposed for the Guyanese taxa Xerocomus parvogracilis, Tylopilus rufonigricans, and Tylopilus exiguus. Boletaceae subfamily Chalciporoideae was recircumscribed to include the new genus Nevesoporus. Molecular phylogenetic analyses using a multilocus data set (ITS+28S+TEF1+RPB1+RPB2) from a large taxon set across the Boletaceae justify recognition of the new genera. Morphological, ecological, and DNA sequence data are provided for the new species. A key to known native and introduced bolete species from the Brazilian Atlantic Forest is provided.

本研究记述了采自巴西东部濒临灭绝的大西洋森林生物群系的4个新分类群，分别为橄榄黄巴西孔菌（Brasilioporus olivaceoflavidus，新属新种）、西蒙氏巴西孔菌（Brasilioporus simoniarum，新种）、南方新热带孔菌（Neotropicomus australis，新属新种）以及黑柄内维斯孔菌（Nevesoporus nigrostipitatus，新属新种），上述类群均隶属于担子菌门（Basidiomycota）牛肝菌目（Boletales）牛肝菌科（Boletaceae）。本研究针对圭亚那的3个类群——小叶绒盖牛肝菌（Xerocomus parvogracilis）、红黑粉孢牛肝菌（Tylopilus rufonigricans）以及细小粉孢牛肝菌（Tylopilus exiguus），提出了将其归入上述新属的新组合。牛肝菌科Chalciporoideae亚科的分类界定得到修订，将新属内维斯孔菌属（Nevesoporus）纳入该亚科。本研究基于覆盖牛肝菌科广泛类群的多基因座数据集（ITS+28S+TEF1+RPB1+RPB2）开展分子系统发育分析，结果支持上述新属的建立。此外，本研究为所有新种提供了形态学、生态学及DNA序列相关数据，并编制了巴西大西洋森林已知本土与外来牛肝菌物种的检索表。