Helvellosebacina granulata, collected from the Euro-Siberian phytogeographical region by the eastern Black Sea in Turkey but most probably also present in Estonia, is described as a species new to science based on both morphological and rDNA data. The new species is well distinguished from similar taxa by typically granular, tough, smooth, whitish to beige basidiomata, elliptical to cylindrical or allantoid basidiospores and elliptical to subglobose or pyriform, longitudinally septate hypobasidia. Several DNA sequences originating from unidentified Estonian material but almost identical or closely similar to those of the type of Helvellosebacina granulata were found in databases, suggesting a wider distribution of the species. The species was found in mixed deciduous forest but is presumed to form mycorrhiza with Carpinus spp. The presence of the genus Helvellosebacina in Turkey is herby revealed for the first time in this study. A full description of the new species is provided with field photos of holotype and paratype collections, micromorphological illustrations, a phylogenetic reconstruction and a short discussion.

中文翻译：

---

Helvellosebacina granulata sp. 十一月 （担子菌：Sebacinaceae）来自土耳其东黑海地区

Helvellosebacina granulata收集自土耳其黑海东部的欧洲-西伯利亚植物地理区域，但很可能也存在于爱沙尼亚，根据形态学和 rDNA 数据，它被描述为科学上的新物种。新种与类似分类群的区别在于典型的颗粒状、坚韧、光滑、白色至米色担子体、椭圆形至圆柱形或尿囊状担子孢子以及椭圆形至近球形或梨形、纵向分隔的亚基胞。几个源自不明爱沙尼亚材料的 DNA 序列，但与Helvellosebacina granulata类型的 DNA 序列几乎相同或非常相似在数据库中发现，表明该物种的分布范围更广。该物种在混交落叶林中被发现，但据推测与Carpinus spp形成菌根。本研究首次揭示了土耳其存在Helvellosebacina属。提供了新物种的完整描述，包括正模和副型收集的实地照片、微形态学插图、系统发育重建和简短讨论。