Department of Biology, Utah State University, Logan, Utah 84322.
Mycologia. 2004 Mar-Apr;96(2):295-309.
We present a morphological and phylogenetic study of Inocybe chelanensis and other North American species of Inocybe that have unusually elongated nodulose spores. Taxonomy and illustrations of these species are provided, along with a key to these and similar species found in Europe and North America. The species concept of I. chelanensis is broadened to include the range of variation occurring for the species in North America. Despite similar basidiospore morphologies, I. chelanensis and I. candidipes are not closely related. Inocybe chelanensis is related more closely to I. stellatospora and I. candidipes is related to I. glabrodisca based on RPB1 and nLSU-rDNA nucleotide sequences. Distal enlongation of Inocybe basidiospores was achieved independently in at least two separate lineages of Inocybe. Inocybe candidipes and I. sierraensis are described as new.
我们对北美具有异常伸长的节结状孢子的榆木蕈属 Chelanensis 及其他种进行了形态学和系统发育学研究。本文提供了这些种的分类和说明，以及在欧洲和北美发现的这些和类似种的一个检索表。榆木蕈属 Chelanensis 的物种概念被扩展，以包括北美种的变化范围。尽管担孢子形态相似，但榆木蕈属 Chelanensis 和榆木蕈属 candidipes 没有密切的亲缘关系。基于 RPB1 和 nLSU-rDNA 核苷酸序列，榆木蕈属 Chelanensis 与榆木蕈属 stellatospora 的亲缘关系更为密切，而榆木蕈属 candidipes 与榆木蕈属 glabrodisca 的亲缘关系更为密切。至少在两个独立的榆木蕈属进化枝中，蕈属 basidiospores 的远端伸长是独立实现的。榆木蕈属 candidipes 和榆木蕈属 sierraensis 被描述为新种。
