Molecular taxonomy and subgeneric classification of tapeworms of the genus Moniezia Blanchard, 1891 (Cestoda, Anoplocephalidae) in northern cervids (Alces and Rangifer)

2018 ◽  
Vol 67 (2) ◽  
pp. 218-224 ◽  
Author(s):  
Voitto Haukisalmi ◽  
Sauli Laaksonen ◽  
Antti Oksanen ◽  
Kimberlee Beckmen ◽  
Ali Halajian ◽  
...  
Keyword(s):  
Molecular Taxonomy

The Genitourinary Pathology Society Update on Classification of Variant Histologies, T1 Substaging, Molecular Taxonomy, and Immunotherapy and PD-L1 Testing Implications of Urothelial Cancers

2021 ◽  
Vol 28 (4) ◽  
pp. 196-208
Author(s):  
Eva Compérat ◽  
Mahul B. Amin ◽  
Jonathan I. Epstein ◽  
Donna E. Hansel ◽  
Gladell Paner ◽  
...  
Keyword(s):  
Molecular Taxonomy

scholarly journals Mitochondrial genome sequencing and phylogeny of Haemagogus albomaculatus, Haemagogus leucocelaenus, Haemagogus spegazzinii, and Haemagogus tropicalis (Diptera: Culicidae)

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Fábio Silva da Silva ◽  
Ana Cecília Ribeiro Cruz ◽  
Daniele Barbosa de Almeida Medeiros ◽  
Sandro Patroca da Silva ◽  
Márcio Roberto Teixeira Nunes ◽  
...  
Keyword(s):  
Evolutionary Biology ◽  
Yellow Fever Virus ◽  
Stop Codon ◽  
Average Length ◽  
Molecular Taxonomy ◽  
Purifying Selection ◽  
Start Codon ◽  
Morphological Aspects ◽  
Mitochondrial Sequences

Abstract The genus Haemagogus (Diptera: Culicidae) comprises species of great epidemiological relevance, involved in transmission cycles of the Yellow fever virus and other arboviruses in South America. So far, only Haemagogus janthinomys has complete mitochondrial sequences available. Given the unavailability of information related to aspects of the evolutionary biology and molecular taxonomy of this genus, we report here, the first sequencing of the mitogenomes of Haemagogus albomaculatus, Haemagogus leucocelaenus, Haemagogus spegazzinii, and Haemagogus tropicalis. The mitogenomes showed an average length of 15,038 bp, average AT content of 79.3%, positive AT-skews, negative GC-skews, and comprised 37 functional subunits (13 PCGs, 22 tRNA, and 02 rRNA). The PCGs showed ATN as start codon, TAA as stop codon, and signs of purifying selection. The tRNAs had the typical leaf clover structure, except tRNASer1. Phylogenetic analyzes of Bayesian inference and Maximum Likelihood, based on concatenated sequences from all 13 PCGs, produced identical topologies and strongly supported the monophyletic relationship between the Haemagogus and Conopostegus subgenera, and corroborated with the known taxonomic classification of the evaluated taxa, based on external morphological aspects. The information produced on the mitogenomes of the Haemagogus species evaluated here may be useful in carrying out future taxonomic and evolutionary studies of the genus.

Old versus new characters for systematics: Cautionary tales from virology

1990 ◽  
Vol 3 (1) ◽  
pp. 159
Author(s):  
A Gibbs ◽  
A Ding ◽  
J Howe ◽  
P Keese ◽  
A MacKenzie ◽  
...  
Keyword(s):  
Amino Acid ◽  
Genetic Recombination ◽  
Large Subunit ◽  
Molecular Taxonomy ◽  
Amino Acid Sequences ◽  
Sequence Information ◽  
Molecular Sequence ◽  
Taxonomic Methods ◽  
Cautionary Tales

Molecular sequence information about viruses has mostly confirmed the groupings devised by traditional taxonomic methods, but shown in addition that the genes of related species may differ in number, arrangement, orientation and in sequence homology. It has also revealed that true genetic recombination between viruses has been common, even among those with RNA genomes, indeed most virus groups seem to have arisen y recombination. Thus, there is an unexpected wealth of genetic chaos hidden behind the fatade of the phenotype, and it is possible that the difficulties that plant taxonomists have had in identifying the relationships of the major groupings of plants could have similar causes. Nonetheless, molecular taxonomy does give sensible results and this is illustrated by a classification of the large subunit Rubisco proteins of 21 plant species based on their amino acid sequences.

A review of the damselfly genus Megalestes Selys, 1862 (Insecta: Odonata: Zygoptera: Synlestidae) using integrative taxonomic methods

Zootaxa ◽  
2020 ◽  
Vol 4851 (2) ◽  
pp. 245-270
Author(s):  
XIN YU ◽  
JUNLI XUE
Keyword(s):  
Species Diversity ◽  
Molecular Taxonomy ◽  
Species Number ◽  
Distance Analysis ◽  
Diversity Measure ◽  
Taxonomic Methods ◽  
Total Species ◽  
Genetic Distance Analysis ◽  
Molecular Characters

We used morphological and molecular characters to review the classification of damselflies in the genus Megalestes Selys, 1862 (Zygoptera: Odonata). Several methods were used for this review, including morphology, cladistics, genetic distance analysis, and molecular taxonomy. Six species were newly defined as junior synonyms (Megalestes palaceus to Megalestes haui, Megalestes chengi to Megalestes micans, Megalestes discus to Megalestes micans, Megalestes raychoudhurii to M. micans, Megalestes maai to Megalestes riccii, and Megalestes tuska to M. riccii). The total species number in Megalestes was reduced from 18 to 12. The importance of an objective species diversity measure is discussed. 

scholarly journals Phylogenetic evidence for an expanded circumscription of Gabura (Arctomiaceae)

2020 ◽  
Vol 52 (1) ◽  
pp. 3-15
Author(s):  
Nicolas Magain ◽  
Toby Spribille ◽  
Joseph DiMeglio ◽  
Peter R. Nelson ◽  
Jolanta Miadlikowska ◽  
...  
Keyword(s):  
South Africa ◽  
North America ◽  
Molecular Taxonomy ◽  
Distinct Species ◽  
New Combinations ◽  
Morphological Convergence ◽  
The Family ◽  
Phylogenetic Lineages ◽  
First Time

AbstractSince the advent of molecular taxonomy, numerous lichen-forming fungi with homoiomerous thalli initially classified in the family Collemataceae Zenker have been transferred to other families, highlighting the extent of morphological convergence within Lecanoromycetes O. E. Erikss. & Winka. While the higher level classification of these fungi might be clarified by such transfers, numerous specific and generic classifications remain to be addressed. We examined the relationships within the broadly circumscribed genus Arctomia Th. Fr., which has been the recipient of several transfers from Collemataceae. We demonstrated that Arctomia insignis (P. M. Jørg. & Tønsberg) Ertz does not belong to Arctomia s. str. but forms a strong monophyletic group with Gabura fascicularis (L.) P. M. Jørg. We also confirmed that Arctomia borbonica Magain & Sérus. and the closely related Arctomia insignis represent two species. We formally transferred A. insignis and A. borbonica to the genus Gabura Adans. and introduced two new combinations: Gabura insignis and Gabura borbonica. We reported Gabura insignis from Europe (Scotland and Ireland) for the first time. While material from Europe and North America is genetically almost identical, specimens from Madagascar, South Africa and Reunion Island belong to three distinct phylogenetic lineages, all of which are present in the latter area and may represent distinct species. In its current circumscription, the genus Gabura may contain up to six species, whereas Arctomia s. str. includes only two species (A. delicatula Th. Fr. and A. teretiuscula P. M. Jørg.). The Gabura insignis group is shown to have an unexpectedly large, subcosmopolitan distribution. With the extended sampling from Arctomiaceae Th. Fr., the placement of Steinera sorediata P. James & Henssen in the genus Steinera Zahlbr. is confirmed and the presence of a new Steinera species from Chile is highlighted.

scholarly journals Bioinformatics Analysis of the Potentially Functional circRNA-miRNA-mRNA Network in Breast Cancer

2022 ◽  
Author(s):  
Cihat Erdogan ◽  
Ilknur Suer ◽  
Murat Kaya ◽  
Zeyneb Kurt ◽  
Sukru Ozturk ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Molecular Taxonomy ◽  
Mirna Gene ◽  
Disease Free Survival ◽  
Detection Methods ◽  
High Morbidity ◽  
Cancer Type ◽  
Hub Genes ◽  
Study Results

Objective: Breast cancer (BC) is a heterogeneous type of cancer that occurs as a result of distinct molecular alterations in breast tissue. Although there are many new developments in treatment and targeted therapy for BC in recent years, this cancer type is still the most common one among women with high morbidity and mortality. Therefore, new research is still needed for biomarker detection. Methods: GSE101124 and GSE182471 datasets were obtained from Gene Expression Omnibus (GEO) database to evaluate differentially expressed circular RNAs (circRNAs). The Cancer Genome Atlas (TCGA) and Molecular Taxonomy of Breast Cancer International Consortium (METABRIC) databases were used to identify the significantly dysregulated microRNAs (miRNAs) and genes considering the Prediction Analysis of Microarray (PAM50) classification. The circRNA-miRNA-gene relationship was investigated using the Cancer Specific CircRNA (v2.0) (CSCD), miRDB, miRWalk and miRTarBase databases. The circRNA-miRNA-mRNA regulatory network was constructed using Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and Gene Ontology (GO) annotation. The protein-protein interaction network was constructed by the STRING 2021 database and visualized by the Cytoscape tool (v3.9.0). Then, raw miRNA data and genes were filtered using some selection criteria according to a specific expression level in PAM50 subgroups. A bottleneck method was utilized to obtain highly interacted hub genes using cytoHubba Cytoscape plugin. The overall survival (OS) and disease-free survival (DFS) analysis were performed for these hub genes, which are detected within the miRNA and circRNA axis in our study. Results: We identified three circRNAs, three miRNAs, and eighteen candidate target genes that may play an important role in BC. In addition, it has been determined that these molecules can be useful in the classification of BC, especially in determining the basal-like breast cancer (BLBC) subtype. Conclusions: We conclude that hsa_circ_0000515/ miR-486-5p/ SDC1 axis may be an important biomarker candidate in distinguishing patients in the BLBC group, especially according to the PAM50 classification of BC.

Integrating morphological and molecular taxonomy with the revised concept of Stelligeridae (Porifera: Demospongiae)

2019 ◽  
Vol 187 (1) ◽  
pp. 31-81
Author(s):  
Christine Morrow ◽  
Paco Cárdenas ◽  
Nicole Boury-Esnault ◽  
Bernard Picton ◽  
Grace McCormack ◽  
...  
Keyword(s):  
New Species ◽  
New Genus ◽  
Molecular Taxonomy ◽  
The Family ◽  
Molecular Studies ◽  
Close Relationship ◽  
One New Species ◽  
A New Species

Abstract This study reinforces and extends the findings of previous molecular studies showing that there is a close relationship between species assigned to the sponge genera Halicnemia, Higginsia, Paratimea and Stelligera and that the family Heteroxyidae is polyphyletic. The present study has led to the description of one new species of Halicnemia and six new species of Paratimea, the resurrection of Halicnemia gallica and a better understanding of the characters uniting Stelligeridae. A new species of Heteroxya is also described. We demonstrate that many of the taxa assigned to Heteroxyidae are more closely related to other families, and we propose several changes to the classification of Heteroscleromorpha. Desmoxyidae is resurrected from synonymy and transferred to Poecilosclerida; Higginsia anfractuosa is transferred to Hymedesmiidae, and a new genus, Hooperia, is erected for its reception; Higginsia durissima is returned to Bubaris (Bubaridae); Higginsia fragilis is transferred to Spanioplon (Hymedesmiidae); Hemiasterella camelus is transferred to Paratimea; and Raspailia (Parasyringella) australiensis and Ceratopsion axiferum are transferred to Adreus (Hemiasterellidae).

Note on the spectral classification of carbon stars in the photographic infrared region

1966 ◽  
Vol 24 ◽  
pp. 21-23
Author(s):  
Y. Fujita
Keyword(s):  
Infrared Region ◽  
Spectral Classification ◽  
Carbon Stars

We have investigated the spectrograms (dispersion: 8Å/mm) in the photographic infrared region fromλ7500 toλ9000 of some carbon stars obtained by the coudé spectrograph of the 74-inch reflector attached to the Okayama Astrophysical Observatory. The names of the stars investigated are listed in Table 1.

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