Institute of Microbiology, Chinese Academy of Sciences, Beijing, China.
Mycologia. 2012 Nov-Dec;104(6):1478-89. doi: 10.3852/11-430. Epub 2012 Jun 8.
Three new freshwater ascomycetes, Diaporthe aquatica sp. nov. (Diaporthaceae), Ophioceras aquaticus sp. nov. (Magnaporthaceae) and Togninia aquatica sp. nov. (Togniniaceae), are described and illustrated based on morphological and molecular data (ITS, 18S, 28S rDNA sequences). Diaporthe aquatica is characterized by globose to subglobose, black ascomata with long necks, broadly cylindrical to obclavate asci, and small, ellipsoidal to fusiform, one-septate, hyaline ascospores; it is unusual among Diaporthe species in the fact that it lacks a stroma and has freshwater habitat. Ophioceras aquaticus is characterized by globose ascomata with a long beak, cylindrical, eight-spored asci with J- subapical rings and 3-5-septate filiform ascospores with slightly acute ends. Togninia aquatica is characterized by globose ascomata with long necks, clavate and truncate asci clustered on distinct ascogenous hyphae, and small, reniform, hyaline ascospores. Differences among the new taxa and similar species are discussed.
基于形态学和分子数据（ITS、18S、28S rDNA 序列），描述并图示了三种新的淡水子囊菌：水生盘菌 Diaporthe aquatica sp. nov.（盘菌科）、水生角担霉 Ophioceras aquaticus sp. nov.（Magnaporthaceae）和水生离褶伞 Togninia aquatica sp. nov.（离褶伞科）。水生盘菌的特征为球形至近球形、黑色子囊壳，具长颈；宽阔的圆柱形至倒棍棒形子囊；小、椭圆形至梭形、单隔膜、透明的子囊孢子；它与 Diaporthe 属的其他种不同，因为它没有菌核且生存在淡水中。水生角担霉的特征为球形子囊壳，具长喙；圆柱形、具 J 亚顶环的八孢的子囊；具 3-5 个隔膜的丝状子囊孢子，末端稍尖。水生离褶伞的特征为具长颈的球形子囊壳，棍棒形至截形的子囊簇生在明显的产囊丝上；小、肾形、透明的子囊孢子。讨论了新分类群与相似种之间的差异。
