Collections on Lonicera in Northwest Iran represent an undescribed species in the Inonotus linteus complex (Hymenochaetales)

The Inonotus linteus complex has been subject to thorough phylogenetic studies in the past few years, with several new species described in the complex. Species in this complex have been recently assigned to two new genera, Sanghuangporus and Tropicoporus. During field works made in Northwest Iran, a number of specimens belonging to the Inonotus (Phellinus) linteus complex were collected on Lonicera, and provisionally referred to as Phellinus cf. baumii. With fine data newly gathered on the delimitation of taxa in the Inonotus linteus complex, a re-examination of morphological characters of Iranian collections was made and analysis of ITS sequences was performed. The results show that the Iranian collections represent a new species. Sanghuangporus ligneus sp. nov. is closely related to S. lonicericola and is distinguished from it by its much larger pores, ungulate to triquetrous basidiomes, and its distribution.