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Mycosystema 菌物学报15 January 2009, 28(1): 001-013 jwxt@im.

ac.cn ISSN1672-6472 CN11-5180Q ?2009 Institute of Microbiology, CAS, all rights reserved. Supported by the National Natural Science Foundation of China (No. 30525002,

30470010 and 30700005), the Knowledge Innovation Program of the Chinese Academy of Sciences (No. KSCX2-YW-G-025), the National Basic Research Program of China (No. 2009CB522300) and the Joint Funds of the National Natural Science Foundation of China and Yunnan Provincial Government (No. U0836604). Part of the field work was supported by the National Science Foundation of the USA (DEB-0321846 to D.E. Boufford and Richard H. Ree). * Corresponding author. E-mail: fungi@mail.kib.ac.cn;

fungiamanita@gmail.com Received: 19-12-2008, accepted: 22-12-2008 A new systematic arrangement of the genus Oudemansiella s. str. (Physalacriaceae, Agari- cales) YANG Zhu-Liang1* ZHANG Li-Fang1 Gregory M. MUELLER2 Gerhard W. KOST3 Karl-Heinz REXER3

1 Key Laboratory of Biodiversity and Biogeography, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China

2 Department of Botany, Field Museum of Natural History, Chicago, IL 60605-2496, U.S.A.

3 Systematic Botany &

Mycology, FB17, Philipps-University Marburg,

35032 Marburg, Germany Abstract: The genus Oudemansiella s. str. has been revised and circumscribed as an assemblage of taxa excluding the genus Xerula s. str. A new systematic arrangement with four sections, i.e., Oudemansiella, Mucidula, Dactylosporina and Radicatae, is proposed. Section Oudemansiella is comprised of tropical to south temperate species, e.g., O. platensis, O. australis, O. canarii and O. crassifolia, with an ixotrichoderm pileipellis composed of filamentous hyphae that, in many cases, are intermixed with inflated cells often occurring in chains, while section Mucidula encompasses north temperate and subtropical taxa such as O. mucida, O. venosolamellata and O. submucida that have an ixohymeniderm-trichoderm pileipellis composed of more or less clavate terminal cells. Sections Oudemansiella and Mucidula share similar habitats and forms of basidiomata, i.e., with or without a (rudimentary) annulus on the stipe and growing on exposed rotten wood. Section Dactylosporina accommodates species from South and Central America with basidiospores that have finger-like ornamentation. Section Radicatae, represented by O. radicata and its allies, is the largest section and includes the remaining species of the genus in its restricted sense. Oudemansiella americana, O. caussei and O. hongoi, previously treated in O. sect. Albotomentosae or Xerula sect. Hyalosetae, are excluded from Oudemansiella in this treatment because preliminary data indicate that they represent a segregate genus. Section Mucidula,

32 combinations and

1 name are newly proposed. Key words: Basidiomycetes, new combinations, new name, nomenclature, systematics, taxonomy 狭义小奥德蘑属(膨瑚菌科,蘑菇目)的一个新系统 杨祝良

1 张丽芳

1 Gregory M. MUELLER

2 Gerhard W. KOST

3 Karl-Heinz REXER

3 2 Mycosystema

1 中国科学院昆明植物研究所生物多样性与生物地理学重点实验室 昆明

650204 2 美国芝加哥费尔德自然历史博物馆植物部 芝加哥 IL 60605-2496

3 德国马尔堡大学生物学系系统植物学与真菌学实验室 马尔堡

35032 摘要:本文对狭义小奥德蘑属 Oudemansiella s. str.的概念做了修订,在修订后的属中,狭义干蘑属 Xerula s. str.的物种不 纳入其中.在狭义小奥德蘑属下,提出了一个包含