Abstract
Species of genus Otidea previously reported in China are mainly distributed in the northeast, northwest and southwest regions of China, but the species diversity of Otidea in north China is not very clear. In this study, newly collected Otidea specimens from northern China and some herbarium specimens deposited in three important Chinese fungus herbaria (HMAS, HKAS, HMJAU) were studied using morphological and phylogenetic methods. The internal transcribed spacers of the nrDNA (ITS), the nrRNA 28S subunit (nrLSU), the translation elongation factor 1-alpha (tef1-α), and the second largest subunit of RNA polymerase II (rpb2), were employed to elucidate the phylogenetic relationships between Otidea species. Results identified 16 species of Otidea, of which seven new species are described, namely O. aspera, O. cupulata, O. filiformis, O. khakicolorata, O. parvula, O. plicara and O. purpureobrunnea. Otidea bicolor and O. pruinosa are synonymized as O. subpurpurea. Two species, O. mirabilis and O. nannfeldtii, are being reported for the first time in China. The occurrence of O. bufonia, O. leporina and O. onotica are confirmed by molecular data in China.
Highlights
Introduction on Molecular and MorphologicalThe genus Otidea (Pers.) Bonord. (Pyronemataceae, Pezizales), with O. onotica (Pers.)Fuckel as the type species, was established in the mid-19th century [1,2]
The species of Otidea formed a monophyletic clade with high support values (BS = 100%, posterior probability (PP) = 1.00)
Otidea pruinosa is proposed as a new species because of receptacle surface with pruinose, but we found a similar granulate on the surface of dry specimens of O. bicolor and O. subpurpurea
Summary
Introduction on Molecular and MorphologicalThe genus Otidea (Pers.) Bonord. (Pyronemataceae, Pezizales), with O. onotica (Pers.)Fuckel as the type species, was established in the mid-19th century [1,2]. The taxonomy of Otidea species are mainly based on the morphological characteristics studied in work before 2006 [5,6,11–17]. Taxonomists began to introduce molecular methods into the taxonomy and identification of Otidea species. Molecular techniques have revolutionized phylogenetics and species delimitation of Otidea [3,4,10,18–25]. In 2009, a whole new set of morphological and histochemical features was introduced in Otidea by Harmaja [15] and further by Hansen and Olariaga [3] and Olariaga et al [4]. These features have made it possible to recognize the species morphologically to a large extent and have since been employed
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