title: A molecular and morphological reassessment of Diademaceae.
abstract: We revisit the family Diademaceae based on available sequence data and morphology. Diademaceae is characterized by ascomata opening with a flat circular lid and fissitunicate, short orbicular frequently cylindrical, pedicellate asci. Ascospores are frequently circular in section but narrowing to one end with three or more transverse septa, without longitudinal septa, and mostly with a thick sheath. In recent treatments Clathrospora, Comoclathris, Diadema, Diademosa, and Graphyllium were placed in the family. Following molecular and morphological study, Clathrospora, Comoclathris, and Diademosa, are excluded from the family and referred to Pleosporaceae. Graphyllium is excluded from Diademaceae, based on hysterothecium-like ascomata with a longitudinal opening, and tentatively placed in Hysteriaceae with uncertainty; species with hysterothecia have now been accommodated in at least five families. The study accepts only Diadema in the family. The status of Diademaceae as a distinct family, based on the ascomata opening by a flat circular lid, is thought to be doubtful. Fresh collections of Diadema are needed for epitypification and to obtain sequence data to establish if this is a well-resolved family.
authors: The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang, Guizhou 550025, China ; School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand ; Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.
authors: Hiran A
authors: HA
authors: Ariyawansa
authors: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand ; Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.
authors: Rungtiwa
authors: 0000-0002-6321-8416
authors: R
authors: Phookamsak
authors: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand ; Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.
authors: Saowaluck
authors: S
authors: Tibpromma
authors: The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of China, Guizhou University, Guiyang, Guizhou 550025, China.
authors: Ji-Chuan
authors: JC
authors: Kang
authors: School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand ; Institute of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand.
authors: Kevin D
authors: KD
authors: Hyde
mesh_terms: D001203:Ascomycota / Q000145:classification / Q000166:cytology* / Q000235:genetics*; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S; D012339:RNA, Ribosomal, 28S
chemical_list: D012337:RNA, Ribosomal, 18S; D012339:RNA, Ribosomal, 28S