University of Alberta, Department of Biological Sciences CW405, Edmonton, AB T6G 2R3, Canada.
Department of Life Sciences, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK; Comparative Plant and Fungal Biology, Royal Botanic Gardens, Kew, Surrey, TW9 3DS, UK; Jilin Agricultural University, Changchun, Jilin Province, 130118, China.
Fungal Biol. 2021 Jul;125(7):495-504. doi: 10.1016/j.funbio.2021.01.007. Epub 2021 Feb 4.
The lichen, to which the name Lecidea lichenicola is found to have been misapplied, was first described from England and is an extreme specialist of chalk pebbles. It has long been known that it is not closely related to Lecidea in the strict sense, but its true evolutionary relationships have been unknown. Here we use metagenome-assembled genome data to place this fungus in a six-locus phylogeny of Ascomycota, and find strong support for its placement in the class Lichinomycetes. Multiple gene trees using existing data from Lichinomycetes support its further placement within the family Lichinaceae. Based on a revision of types and original descriptions, we conclude that the earliest name for this species is Lecidea obsoleta (syn. Thrombium cretaceum). We neotypify that name by a modern collection and accommodate it in the new genus Watsoniomyces. Type and other original material of L. lichenicola (syn. Discocera lichenicola) was re-examined and found not to be on chalk and to represent a different lichen, Trapelia glebulosa. Watsoniomyces is the first described member of Lichinomycetes with an endolithic thallus.
被错误应用于“Lecidea lichenicola”名称的地衣，最初是在英国被描述的，它是白垩卵石的极端专性物种。长期以来，人们一直知道它与狭义上的 Lecidea 没有密切关系，但它的真实进化关系一直未知。在这里，我们使用宏基因组组装基因组数据，将这种真菌置于子囊菌的六个基因座系统发育中，并发现其在 Lichinomycetes 类中的位置有很强的支持。使用 Lichinomycetes 现有数据的多个基因树支持其在 Lichinaceae 科内的进一步位置。基于对类型和原始描述的修订，我们得出结论，该物种的最早名称是 Lecidea obsoleta（同义词 Thrombium cretaceum）。我们通过现代收集来对该名称进行正型化，并将其归入新属 Watsoniomyces 中。对 L. lichenicola（同义词 Discocera lichenicola）的模式和其他原始材料进行了重新检查，发现它不在白垩石上，而是代表一种不同的地衣 Trapelia glebulosa。Watasiomyces 是第一个描述的具有内生叶状体的 Lichinomycetes 成员。
