Botanical Museum, Department of Biology, P.O. Box 3000, 90014 University of Oulu, Finland.
Mycologia. 2010 Sep-Oct;102(5):1089-95. doi: 10.3852/09-317.
Thuemenidium is a small earth tongue genus with three recognized white-spored species. Within Thuemenidium, T. atropurpureum and T. arenarium have been reported only from the northern hemisphere while T. berteroi is known solely in the southern hemisphere. We reviewed the ecology, examined the morphology and inferred the systematic positions of northern species of Thuemenidium from LSU-rDNA gene phylogeny of 48 taxa in Pezizomycotina including recent collections. Our results suggest that Thuemenidium in its current sense is polyphyletic and that T. atropurpureum, closely related to Microglossum and Leotia species, is a member of Leotiaceae (Helotiales, Leotiomycetes). Our phylogeny placed the other northern species, T. arenarium, in Geoglossaceae (Geoglossales, Geoglossomycetes), retaining genus Thuemenidium, pending further investigation.
地舌属是一个包含三个具有白色孢子物种的小属。在该属中，T. atropurpureum 和 T. arenarium 仅在北半球有报道，而 T. berteroi 则仅在南半球有报道。我们回顾了生态学，检查了形态学，并从包括最近采集的 Pezizomycotina 中的 48 个分类群的 LSU-rDNA 基因系统发育推断了北方地舌属的系统发育位置。我们的结果表明，目前意义上的地舌属是多系的，与 Microglossum 和 Leotia 物种密切相关的 T. atropurpureum 是 Leotiaceae（Helotiales，Leotiomycetes）的成员。我们的系统发育将另一个北方物种 T. arenarium 置于地舌科（Geoglossales，Geoglossomycetes）中，保留地舌属，待进一步研究。
