查看更多>>摘要：During a survey of benthic diatoms from the Bulgarian Black Sea coast near the historic town of Sozopol, we found a high diversity of Amphora sensu lato taxa at a single site and on a single type of artificial substratum. A total of 40 taxa from the current genera Amphora, Halamphora, Seminavis and Tetramphora were recognized during light microscopy (LM) and scanning electron microscopy (SEM) observations. We were able to identify with a high degree of certainty only 6 taxa based on the literature. whereas for 19 taxa (or almost 50% of all taxa) we could not find even sufficiently similar species, and they remained unidentified to species level. Many of the species had small valve dimensions. The paper presents all taxa with short morphometric data and microphotographs under LM and SEM, where possible. All taxa are discussed and compared with similar known taxa. The illustrative materials in earlier works from the Black Sea and species descriptions, where such were available, were also consulted. Diversity of Amphora sensu lato in the Black Sea coastal waters seems to be underestimated, whereas some of the past records are uncertain. A discussion on the current state of knowledge of Amphora sensu lato species from the Black Sea is given.
Leme, Elton M. C.Zizka, GeorgDe Souza, Everton HiloPaule, Juraj...
43页
查看更多>>摘要：The continuous refinement of the morphological, anatomical, and molecular studies on the genera of the ???Cryptanthoid complex???, mainly considering the recently discovered outlier species, gave rise to new interpretations of species relationships. It reinforced the monophyly of the groups, and allowed the recognition of the new monotypic genus Siqueiranthus based on a morphologically unique endemic species from northeastern Brazil on the brink of extinction, as well as generic status for Krenakanthus and Orthocryptanthus previously conceived as subgenera of Orthophytum, with readjustments in the positioning of some species. An integrative approach with the combination of multiple traits and the critical assessment of the diagnostic characters proved to be useful for the establishment of the new monophyletic genera. A new unusual species of Orthophytum is also described and illustrated, and its phylogenetic relationships are discussed.
查看更多>>摘要：Bixa is a Neotropical genus with four to five species recognized and meaningful economic importance due to Bixa orellana, the source of annatto, widely used as a condiment and food coloring. Despite this importance, the genus has had little attention in recent taxonomic studies, and the principal monograph for the genus is outdated and remains unpublished. In the course of the preparation of the treatment of Bixaceae for the Flora of Espirito Santo, Brazil, many specimens identified as Bixa arborea were found, however, they differ from that species in several morphological features, especially in fruit. Instead, these specimens resemble Bixa excelsa; nevertheless, they differ in leaf venation, petal color, fruit color and morphology. These unmatched specimens belong to Bixa atlantica, a new species proposed here, endemic to the Atlantic Forest. Additionally, we provide a distribution map, photograph plates, and phenology graphics for Bixa atlantica and B. excelsa, a preliminary conservation status assessment and comments on the ecology and recognition for the new species.
查看更多>>摘要：During the surveys of air fungi in Beijing, China, a new ascomycetous black yeast-like species was isolated. Morphological and phylogenetical analyses of combined internal transcribed spacer (ITS) and the large ribosomal subunit (LSU) showed that it can be recognized as a new species of the genus Aureobasidium. Herein, Aureobasidium aerium sp. nov. is proposed and illustrated.
查看更多>>摘要：Xenoastrosphaeriella aquatica sp. nov. was discovered during an investigation of lignicolous freshwater fungi in northwestern Yunnan Province, China. Evidence of morphological characters and sequence data indicated that the new collection has affiliation to Xenoastrosphaeriella. Phylogenetic analysis of combined LSU, SSU and tef1-?? sequence data was carried out to determine the phylogenetic placement of this species, which showed that X. aquatica clustered with X. tornata and X. trochus, but these three species are phylogenetically distinct. Xenoastrosphaeriella aquatica differs from other species in having dark olive to brown and larger ascospores. A detailed description and illustration of the new species are provided, as well as the comparisons with similar taxa.
查看更多>>摘要：Magnolia brunnescens is described and illustrated as a new species. This taxon belongs to Magnolia sect. Manglietia and is similar to M. dandyi, but differs from the latter by its brown-tomentose indument in buds, twigs, stipules, petioles and peduncles, elliptic-ovoid vegetative buds ca. 1.0 cm long, adaxially villous leaf blades, apically semi-orbicular anthers and sparsely villous carpels. A line illustration, photograph image and an estimate of preliminary conservation status for the new species are provided.
查看更多>>摘要：Butyriboletus brunneoides sp. nov. and Bu. sinoregius sp. nov. are described from Shanxi Province of China based on morphology and molecular work. Butyriboletus brunneoides differs from Bu. brunneus by the small to medium basidiome, smooth pileus, and a thin stipe that develops reddish stains near the base. Butyriboletus sinoregius differs from the European B. regius by a basidiome bluing when bruised and a pileus covered with fine tomentum. Phylogenetic analyses based on ITS, nrLSU, tef1-?? and rpb2 sequences support the taxonomic position of the two new species. Illustrated macro-and micro descriptions are provided along with a key to the Butyriboletus species from China.
查看更多>>摘要：Stryphnodendron is a Neotropical genus of Fabaceae (Caesalpinioideae, mimosoid clade), comprising 36 taxa occurring from Nicaragua to Southern Brazil, most of them found and endemic in Brazil, being especially frequent in savannas (Cerrado) and the Amazon Forest. This synopsis presents the designation of 16 lectotypes, eight new synonyms, a new combination with a nomenclatural status change, a species??? reestablishment, two doubtful names and three excluded species. We also present nine new species, which are described and illustrated. All the species are accompanied by comments on geographical distribution, habitat and IUCN Conservation status.
NSTL
Magnolia Press