Xiong, YinruManawasinghe, Ishara S.Liao, ChunfangHyde, Kevin D....
11页
查看更多>>摘要：Microfungi associated with palm are a significant fungal group with a unique ecological niche and a broad distribution in tropical regions. Even though many fungal species have been reported from palm hosts, studies on fungi from Arenga tremula are considerably few. In this study, we isolated a saprobic Botryosphaeriaceae species on A. tremula, collected from Guangzhou, Guangdong Province, China. Morphological characteristics and phylogenetic analysis of the internal transcribed spacer (ITS), small subunit nuclear rRNA gene (SSU),part of the large subunit nuclear rRNA gene (LSU) and translation elongation factor 1-alpha gene (tef 1-alpha). Based on phylogenetic results and morphology we introduced Neodeightonia arengae sp. nov., with species description and illustrations. In addition, we provide a comparison of morphological characters of currently accepted Neodeightonia species. This is the first report of a Neodeightonia species associated with Arenga tremula and so represents an additional contribution to the knowledge of fungi associated with palm trees.
Carnevali, GermanRomero-Gonzalez, Gustavo A.Tapia-Munoz, Jose LuisRamirez-Morillo, Ivon M....
22页
查看更多>>摘要：Gonolobus is reassessed in the Yucatan Peninsula Biotic Province (YPBP). The genus consists of seven taxa in the area: six species and two subspecies. These include a taxon that we propose here as a new species and the treatment of G. yucatanensis as a subspecies of G. stenanthus and the new combination G. stenanthus subsp. yucatanensis is proposed. These two taxa are endemic to the YPBP. The other species are G. barbatus (for which we propose a lectotype), G. cteniophorus, G. fraternus, G. glaberrimus, and G. leianthus. The new species is G. caamalii Carnevali & R. Duno, restricted to the Yucatan state in Mexico and distinguished by its corolla lobes with a dark purple (almost black) longitudinal, callose band along the proximal 2/3 on the right side of the lobes and a 1.1-1.3 mm broad, annular, continuous dark purple-black band surrounding the gynostemium and corona at the base of the corolla lobes. It appears related to G. leianthus from southern Megamexico, a species from humid forests at higher elevations and that differs in its larger flowers with broader corolla lobes and a strikingly different color pattern in the flowers. The new species is described, illustrated, and discussed. Entries for all Gonolobus species from the YPBP include a brief discussion and specimen citations. The conservation status of the Gonolobus taxa endemic to the YPBP are assessed either as as Endangered (EN) or as Near threatened (NT). Distributional maps for all Gonolobus from the area covered are presented. Finally, we offer a key to Gonolobus of the YPBP.
查看更多>>摘要：Linaria subbaetica, a new species from the south of the Iberian Peninsula, is here described, illustrated, and compared with its morphologically closest relatives from L. sect. Supinae: L. badalii, L. caesia, and L. supina. The species is characterised by being annual, and having usually revolute leaves, a short and corymbiform inflorescence at anthesis with a pilose-glandulose axis, a white to pale-yellow corolla (yellow to orangish palate), bearing a spur equalling to slightly longer that the rest of the corolla, and black seeds with a tuberculate and papillose disc surface and a thickened wing. L. subbaetica is an endemic species, growing on calcareous mountains, in the Sierras Subbeticas Natural Park, Cordoba province (Andalusia, Spain).
查看更多>>摘要：Types and recently collected samples of two Paxillus species namely P. rhytidophyllus and P. yunnanensis, originally described from southwestern China, were critically restudied based on morphology and molecular phylogenetic data of DNA sequences from the large subunit of the nuclear ribosomal RNA (nrLSU), the nuclear ribosomal internal transcribed spacer (ITS), and the translation elongation factor 1-alpha (tef1-alpha). The results showed that these two species belong to Boletinellus and Tricholomopsis, respectively. Thus, two new combinations, Boletinellus rhytidophyllus and Tricholomopsis yunnanensis are proposed. Boletinellus rhytidophyllus is characterized by a deeply decurrent and shallow hymenophore which is poroidlamellate to alveolate, slightly thick-walled (0.6-1 mu m) basidiospores, occasionally 2- to 4-spored basidia, rare or infrequent hymenial cystidia, and a trichodermal pileipellis. Tricholomopsis yunnanensis is characterized by a convex pileus densely covered by red-violet to red-brown fibrillose squamules, a yellowish stipe sparsely covered with red to red-brown fibrillose squamules, subglobose to broadly ellipsoid basidiospores, prominent large cheilocystidia measuring 60-195 x 11-39 mu m, and a palisadic pileipellis. New descriptions and line drawings of these two species and their comparisons with allied taxa are presented.
Maciel-Silva, Juliene de Fatimado Nascimento Prata, Ana PaulaLopez, Maria GabrielaBraganca Gil, Andre dos Santos...
9页
查看更多>>摘要：A new species of Bulbostylis (Cyperaceae), only known from the Brazilian Amazonian coast, is here described and illustrated. Bulbostylis litoreamazonicola was found growing over dunes, in seasonally flooded restinga vegetation, and in humid fields near the mangroves from the State of Para, Northern Brazil. This is the fifth Brazilian-native species of Bulbostylis lacking a persistent stylopodium on the mature fruit. The new species is mainly characterized by its annual habit, simple anthelate inflorescences, densely hispid to hispidulous longitudinally ribbed scapes, pubescent glumes, and cordiform nutlets.
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