New Chinese Pruinose Fungi Expand Lichen Identification Guide

In a recent issue of MycoKeys, researchers reported four novel species within the lichen‑forming family Acarosporaceae, all exhibiting pruina—a waxy coating that aids field identification ¹.net]. The study was led by Fuhui Liang and colleagues—Jiaxin Wang, Ling Hu, Congcong Miao, Hongli Si, Runlei Chang, Lulu Zhang, Xinyu Wang, Lisong Wang, and Zuntian Zhao—and appears on pages 175–197 of volume 137.

The team identified three new pruinose species of Sarcogyne: Sarcogyne bayingolinensis, S. parasitica and S. yiliensis. Each displays distinctive features useful to foragers and taxonomists. S. bayingolinensis is marked by a lobate thallus margin and lacks pruina around its apothecial disc; this absence helps distinguish it from other pruinose relatives. S. parasitica shows areoles with deep fissures surrounding the disc and exhibits a parasitic lifestyle. S. yiliensis has a thin hymenium (50–60 µm) and tall subhymenium (50–80 µm). All three species share an IKI+ blue hymenial gel reaction.

In addition, researchers described Acarospora iqbalii, the first Acarosporaceae species recorded in China. The paper also revisited A. tianshanica, noting two distinct chemical types—one containing gyrophoric acid and one lacking it—and supplemented the molecular data of A. glaucocarpa from China. These updates refine phylogenetic relationships within the family and provide a more robust key for identification.

The authors emphasize that Acarosporaceae species often present morphological similarities that challenge even seasoned mycologists. By detailing subtle differences such as pruina distribution, hymenial thickness, and chemical reactions, the study equips both academic and hobbyist communities with clearer diagnostic criteria. For mushroom foragers who rely on quick visual cues to avoid toxic look‑alikes, these new markers could reduce misidentification risks when encountering lichenized fungi in temperate Chinese forests.

Accurate field identification underpins safe mushroom foraging, especially where edible species coexist with poisonous mimics. The clarified distinctions among Sarcogyne species help prevent confusion with other pruinose taxa that might be mistakenly classified by casual observers.

In sum, Liang et al.’s work expands the known diversity of Acarosporaceae in China, supplies practical identification tools, and underscores the importance of detailed morphological and chemical analysis for reliable mycological surveys¹.net].