A new species of Boletinellus (Boletinellaceae, Boletales) from India

A new species of Boletinellus, namely B. viridianus, is described from India based on morphological and molecular data. B. viridianus is characterized by basidiomata with a deeply decurrent poroid-lamellate hymenophore turning blue-green on bruising, an eccentric to lateral stipe covered with the hymenophoral structure extending lengthwise, oblong to ellipsoid, thin- to thick-walled, inamyloid basidiospores, two- to four-spored basidia, a pileipellis that is primarily a cutis interrupted by trichodermal clusters, and the presence of clamp connections. DNA sequences of internal transcribed spacer (ITS) and 28S rDNA (28S) gene loci were used for phylogenetic analysis. Detailed description, color photo plates, a species comparison table, and a taxonomic key to Boletinellus species known worldwide are provided.

Automated summary

A new species of Boletinellus, B. viridianus, was identified in India through a combination of morphology and molecular analysis. This species is characterized by its unique features such as a poroid-lamellate hymenophore that turns blue-green when bruised, an eccentric to lateral stipe with a lengthwise extending hymenophoral structure, inamyloid basidiospores, two- to four-spored basidia, a pileipellis interrupted by trichodermal clusters, and presence of clamp connections. The phylogenetic analysis was based on the DNA sequences of the ITS and 28S rDNA loci. Detailed description, color photo plates, comparison table, and taxonomic key to Boletinellus species worldwide are provided.