Multiclavula petricola is described as a new species based on morphological characters, its unique habitat on rocks, and the result of molecular phylogenetic analyses of the sequence of internal transcribed spacer of the nuclear ribosomal DNA. The fruiting bodies of M. petricola were dispersed on wet rock surface with numerous lichenized globules. The globular thallus was organized by several green algal photobiont cells with pyrenoids surrounded by mycobiont hyphae. The phylogenetic analyses indicated that its affiliation was in Multiclavula. The basidiospores of M. petricola germinated on water agar, and the brief descriptions of the colony morphology are also provided.

基于形态特征，其在岩石上的独特栖息地以及对核糖体DNA的内部转录间隔区序列进行分子系统发育分析的结果，Multiclavula petricola被描述为一种新物种。毛果杨的子实体分散在湿的岩石表面，上有许多地衣化的小球。球形的all由数个绿色的藻类光生物体细胞组成，其类胡萝卜素被真菌生物体的菌丝包围。系统发育分析表明，它的隶属在多锁骨中。在水琼脂上萌发的毛状支原体的孢子孢子，并提供了菌落形态的简要描述。