A new combination in the genus Siler (Apiaceae) for the Balkan flora

Phytotaxa ◽  
2016 ◽  
Vol 278 (2) ◽  
pp. 171
Author(s):  
FABIO CONTI ◽  
FABRIZIO BARTOLUCCI ◽  
MARJAN NIKETIĆ ◽  
DMITAR LAKUŠIĆ
Keyword(s):  
Molecular Study ◽  
New Combination ◽  
Recent Molecular Study

A recent molecular study (Banasiak et al. 2016) reconstructed the phylogeny of all the genera belonging to tribe Scandiceae Spreng. subtribe Daucinae Dumort., showing that the genus Laserpitium Linnaeus (1753: 248) is polyphyletic. Banasiak et al. (l.c.) split Laserpitium into 5 genera: Laserpitium L., Ekimia Duman & Watson (1999: 200), Laser Borkh. ex Gaertner, Meyer & Scherbius (1799: 244, 384), Siler Miller (1754: without pagination), Silphiodaucus (Koso-Poljansky 1916: 211) Spalik, Wojewódska, Banasiak, Piwczyński & Reduron in Banasiak et al. (2016: 578), and Thapsia Linnaeus (1753: 261).

Nomenclatural novelties and typification of names in Scorzonera sensu lato (Asteraceae, Cichorieae) for the Italian vascular flora

Phytotaxa ◽  
2020 ◽  
Vol 437 (5) ◽  
pp. 279-290 ◽  
Author(s):  
FABRIZIO BARTOLUCCI ◽  
GABRIELE GALASSO ◽  
FABIO CONTI
Keyword(s):  
Molecular Study ◽  
Sensu Stricto ◽  
New Combinations ◽  
Vascular Flora ◽  
Taxonomic Treatment ◽  
Recent Molecular Study

According to recent molecular study, the genus Scorzonera sensu lato is polyphyletic. A revised circumscription of this genus was proposed with the recognition of seven genera: Scorzonera sensu stricto, Gelasia, Lipschitzia, Pseudopodospermum, Pterachaenia, Ramaliella, and Takhtajaniantha. Accordingly, a taxonomic treatment of the genus Scorzonera sensu lato for the Italian vascular flora is presented. Nomenclatural types for six names are designated here: Scorzonera calcitrapifolia var. decumbens, S. columnae, S. deliciosa, S. neapolitana, S. trachysperma var. undulata, and S. villosa. Furthermore, the following new combinations are proposed: Gelasia villosa subsp. columnae, Pseudopodospermum hispanicum subsp. asphodeloides, P. hispanicum subsp. neapolitanum, and P. undulatum subsp. deliciosum.

On the presence of North American clubmoss Huperzia lucidula (Lycopodiaceae) in China: An intercontinental disjunction or misidentification

Phytotaxa ◽  
2015 ◽  
Vol 219 (3) ◽  
pp. 243 ◽  
Author(s):  
Nawal Shrestha ◽  
Xian-Chun Zhang
Keyword(s):  
North America ◽  
American Literature ◽  
North American ◽  
Chinese Literature ◽  
Intergenic Spacer ◽  
Molecular Study ◽  
New Combination ◽  
Disjunct Distribution ◽  
Separate Species ◽  
The North

The North American shining clubmoss, Huperzia lucidula, was originally thought to be endemic to North America. However it was reported from China by Ren Chang Ching in 1981, and hence was believed to have a disjunct distribution in North America and Asia. Since then, in all Chinese literature H. lucidula has been described as a disjunct taxon, although in North American literature it has nearly always only been reported from eastern North America. The studies on the Chinese taxon are at present insufficient to address this taxonomical and biogeographical disparity. In this study we have attempted to unravel this issue using integrative morphological and molecular analyses. Morphological study included a thorough examination of specimens from the entire distribution range of H. lucidula in the USA, Canada and China following field collections. Molecular study included Maximum Likelihood and Bayesian inference phylogenetical analyses of three chloroplast markers: the genes rbcL and matK and the psbA-trnH intergenic spacer. The results showed distinct morphological differences between the North American and Chinese taxa, sufficient to recognize them as separate species. The molecular results corroborated these findings and supported the separation of the two taxa. Based on our results, the Chinese taxon is neither a variant of H. lucidula nor sister to it and therefore the supposed disjunct distribution of H. lucidula is erroneous and a result of misidentification. The Chinese taxon that was firstly reported by Ching as H. lucidula var. asiatica has been elevated to the species rank and a new combination has been made.

The end of the long road: Iranian endemic Seseli elbursense (Apiaceae) has taken its place in the genus Semenovia

Phytotaxa ◽  
2020 ◽  
Vol 435 (1) ◽  
pp. 1-15
Author(s):  
DMITRY LYSKOV ◽  
EUGENE KLJUYKOV ◽  
ELENA TERENTIEVA ◽  
ULIANA UKRAINSKAJA ◽  
TAHIR SAMIGULLIN
Keyword(s):  
Endemic Species ◽  
Molecular Study ◽  
Morphological Features ◽  
New Combination

The little-know Iranian endemic species Seseli elbursense was collected by the first author during fieldwork. It was described originally as Trachydium eriocarpum; however, mature fruits are unknown to date, and therefore its generic affiliation is ambiguous. Rechinger in Flora Iranica concluded that the species can be a member of the genus Platytaenia (now part of Semenovia). Our molecular study and comparison of morphological features confirm the opinion of Rechinger; we therefore transfer Seseli elbursense to the genus Semenovia, establishing a new combination, Semenovia eriocarpa.

Two new species of Huascaromusca Townsend from Colombia, and a new combination for Giovanella carvalhoi (Diptera: Mesembrinellidae)

Zootaxa ◽  
2017 ◽  
Vol 4231 (2) ◽  
pp. 251
Author(s):  
MARTA WOLFF ◽  
YARDANY RAMOS-PASTRANA ◽  
MARCO ANTONIO TONUS MARINHO ◽  
DALTON DE SOUZA AMORIM
Keyword(s):  
New Species ◽  
Molecular Study ◽  
New Combination ◽  
The Family ◽  
Two New Species

The Mesembrinellidae (Diptera: Oestroidea) are a group of exclusively Neotropical flies, with 38 recognized species distributed in nine genera. A total of 11 of these species, present in seven genera, were known to occur in Colombia. Huascaromusca obscura Wolff, sp. nov. and H. cordillera Wolff & Ramos-Pastrana, sp. nov. are herein described and their male terminalia are illustrated. Based on a prior molecular study of the family, Giovanella carvalhoi Wolff et al., 2013 is transferred to Huascaromusca Townsend. A key to all known species of Huascaromusca is provided. 

scholarly journals Global genetic homogeneity in the deep-sea foraminiferan Epistominella exigua (Rotaliida: Pseudoparrellidae)

Zootaxa ◽  
2009 ◽  
Vol 2096 (1) ◽  
pp. 23-32 ◽  
Author(s):  
BEATRICE LECROQ ◽  
ANDREW JOHN GOODAY ◽  
JAN PAWLOWSKI
Keyword(s):  
Deep Sea ◽  
Internal Transcribed Spacer ◽  
Genetic Similarity ◽  
Molecular Study ◽  
Wide Distribution ◽  
Small Subunit ◽  
Genetic Homogeneity ◽  
Rdna Sequences ◽  
Recent Molecular Study ◽  
Epistominella Exigua

Epistominella exigua is one of the most common deep-sea foraminiferal morphospecies and has a world-wide distribution. A recent molecular study revealed high genetic similarity between Arctic, Atlantic and Antarctic populations of this species. Here, we show that the small-subunit (SSU) and internal transcribed spacer (ITS) rDNA sequences of an E. exigua population from Pacific are almost identical to those reported previously from the other three oceans. This result confirms the genetic homogeneity of E. exigua, which contrasts with the prevalence of highly differentiated populations in planktonic and shallow-water benthic foraminiferans. We discuss special features of diversifications mechanisms in the deep sea that may be responsible for the lack of genetic differentiation and global distribution of some meiofauna species.

scholarly journals Taxonomic recognition of some species-level lineages circumscribed in nominal Rhizoplaca subdiscrepans s. lat. (Lecanoraceae, Ascomycota)

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9555
Author(s):  
Katarzyna Szczepańska ◽  
Jacek Urbaniak ◽  
Lucyna Śliwa
Keyword(s):  
Habitat Preferences ◽  
Taxonomic Status ◽  
Molecular Study ◽  
Species Level ◽  
New Combination ◽  
Internal Transcribed Spacer Region ◽  
Worldwide Distribution ◽  
Monophyletic Lineage ◽  
North And South America ◽  
North And South

Background Rhizoplaca subdiscrepans (Nyl.) R. Sant., a saxicolous, placodioid lichen, is considered to have a worldwide distribution in warm-temperate to boreal-arctic areas in Asia, Europe and North America. However, recent studies have revealed that this species includes five unrecognized species-level lineages—‘subd A, B, C, D and E’. During research focused on the diversity of saxicolous lichens in mountainous areas of southern Poland, some interesting representatives of the genus Rhizoplaca were found. The main aim of our study was to determine the taxonomic status of the collected specimens by means of molecular tools and a comparative analysis of similar herbarium materials. Methods Detailed morphological, anatomical and chemical examinations of reference material from Asia, Europe and North and South America focused primarily on a selected group of lecanoroid taxa with a placodioid thallus. In addition, 21 new generated sequences representing Lecanora pseudomellea, Protoparmeliopsis muralis, Rhizoplaca opiniconensis, R. subdiscrepans s. lat. and R. phaedrophthalma were selected for molecular study using the internal transcribed spacer region (ITS rDNA), together with 95 available GenBank sequences mainly from the genus Rhizoplaca. Results Polish specimens that clustered with members of a potential species-level lineage ‘subd E’ of Rhizoplaca subdiscrepans complex were recovered. Comprehensive analyses of the lichen group led us to the conclusion that lineage ‘subd E’ represents R. subdiscrepans s. str. and that the taxon appears to have a limited geographical distribution and specific habitat preferences. Furthermore, some of the recently defined species candidates within R. subdiscrepans s. lat.—‘subd D’ and ‘subd A’—should be assigned to two previously known species of Rhizoplaca, namely R. opiniconensis (Brodo) Leavitt, Zhao Xin & Lumbsch and R. phaedrophthalma (Poelt) Leavitt, Zhao Xin & Lumbsch, respectively. These two species are characterized by phenotypic features observed as well in analyzed specimens representing lineages ’subd D’ and ’subd A’. Moreover, the representatives of these lineages demonstrate some differences in occupied habitat and geographical range that also correspond with the indicated species. Additionally, it was found that Lecanora pseudomellea B.D. Ryan is a strongly supported monophyletic lineage within Rhizoplaca, and therefore an appropriate new combination for the species is proposed.

scholarly journals Robust phylogenetic position of the enigmatic hydrozoan, Margelopsis haeckelii revealed within the family Corymorphidae

2021 ◽  
Author(s):  
Daria M. Kupaeva ◽  
Tatiana S. Lebedeva ◽  
Tatiana P. Ashurkova ◽  
Andrey A. Prudkovsky ◽  
Daniel Vanwalleghem ◽  
...  
Keyword(s):  
18S Rrna ◽  
Phylogenetic Signal ◽  
Sister Group ◽  
Molecular Study ◽  
Phylogenetic Position ◽  
28S Rrna ◽  
Recent Molecular Study ◽  
The Family ◽  
Molecular Phylogenetic ◽  
Multigene Analyses

The life-cycle and polyp morphology of Margelopsidae representatives are very different from all other Aplanulata cnidarians. Until recently, their evolutionary origin and phylogenetic position has been a subject of significant speculation. A recent molecular study based only on COI data unexpectedly placed Margelopsidae as a sister group to all Aplanulata, despite the Margelopsid morphology suggests affiliation with Tubulariidae or Corymorphidae. Here we used multigene analyses, including nuclear (18S rRNA and 28S rRNA) and mitochondrial (16S rRNA and COI) markers of the Margelopsidae hydroid Margelopsis haeckelii Hartlaub, 1897, to resolve its phylogenetic position with respect to other hydrozoans. Our data provides strong evidence that M. haeckelii is a member of the family Corymorphydae, making the family Margelopsidae invalid. Furthermore, we show that medusa previously known as M. harlaubii Browne, 1903 is sister to Plotocnide borealis, Wagner, 1885 and might be a member of Boreohydridae. The phylogenetic signal of polyp and medusа stages is discussed in light of concept of inconsistent evolution and molecular phylogenetic analysis.

Scanning and Transmission Electron Microscopy of Human Red Blood Cells

1969 ◽  
Vol 27 ◽  
pp. 44-45
Author(s):  
A.J. Tousimis ◽  
T.R. Padden
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Blood Cells ◽  
Room Temperature ◽  
Type Specimen ◽  
New Combination ◽  
Human Red Blood Cells ◽  
Transmission Electron ◽  
Microscope Slides ◽  
Scanning Electron

The size, shape and surface morphology of human erythrocytes (RBC) were examined by scanning electron microscopy (SEM), of the fixed material directly and by transmission electron microscopy (TEM) of surface replicas to compare the relative merits of these two observational procedures for this type specimen.A sample of human blood was fixed in glutaraldehyde and washed in distilled water by centrifugation. The washed RBC's were spread on freshly cleaved mica and on aluminum coated microscope slides and then air dried at room temperature. The SEM specimens were rotary coated with 150Å of 60:40- gold:palladium alloy in a vacuum evaporator using a new combination spinning and tilting device. The TEM specimens were preshadowed with platinum and then rotary coated with carbon in the same device. After stripping the RBC-Pt-C composite film, the RBC's were dissolved in 2.5N HNO3 followed by 0.2N NaOH leaving the preshadowed surface replicas showing positive topography.

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