作为担子菌的一个新科石花菌科目前包括单属、单种，即新属石花菌属和新种石花菌。新种子实体大型，胶质，石花菜状，具多级分枝；担子器（basidiopycnidium，新术语，用于描述一种内部产生担子的、发育良好的壳状结构）自末端分枝产生，长颈瓶状，具细长的喙，有发育良好的壁，内生担子和担孢子；担子短柱状，具3个横隔，无色，担孢子梗侧生；担孢子椭圆形，无色，单细胞。提供了子实体的形态、担子器形态及解剖结构、担子和担孢子的图解和详细描述，并对新种的分类地位进行讨论。

A new basidiomycete family Mycogelidiaceae with a new genus Mycogelidium is established to accommodate a Gelidium-like or coralloid macrofungus producing pycnidioid, long-beaked, basidium-bearing bodies, with transversely septate basidia and ellipsoid basidiospores. The gross morphology and anatomic structure of a new species are described and illustrated in a detail, and its distinctions from fungi with similar basidium-bearing structures are discussed. Basidiopycnidium is coined to term the well-developed, pycnidioid, basidium-bearing structure.