Review of the current objectives and modern approaches to studying extant and extinct shrews (Soricomorpha: Soricidae) investigation: the origin of the modern subfamilies and diversity of Crocidosoricinae

2021 ◽  
Vol 325 (4) ◽  
pp. 409-429
Author(s):  
L.L. Voyta
Keyword(s):  
Comparative Analysis ◽  
Morphological Analysis ◽  
Phylogenetic Signal ◽  
Taxonomic Composition ◽  
Morphological Data ◽  
Practical Application ◽  
Preliminary Results ◽  
Current Review ◽  
Fossil Material ◽  
Upper Molar

The current review is devoted to topical issues of the origin of modern shrew’ subfamilies Soricinae Fischer, 1817 and Crocidurinae Milne-Edwards, 1868 (Soricomorpha: Soricidae), as well as to the consideration of the possibility of using morphological analysis to search for ancestral groups of modern soricine and crocidurine shrews within the extinct subfamily Crocidosoricinae Reumer, 1987. The data on the taxonomic composition of the Crocidosoricinae subfamily and the preliminary results of a comparative analysis of the Neogene shrews Miosorex Kretzoi, 1959 and Shargainosorex Zazhigin et Voyta, 2018 (Crocidosoricinae) shrews with the representatives of Soricinae and Crocidurinae according to the shape of the first upper molar M1 are presented as an example to substantiate urgent problems in this area. The problem of relations of molecular and morphological data are discussed using individual groups as examples. Modern approaches of geometric morphometry are described, which together with phylogenetic data allow assessing the expression of the phylogenetic signal when analysing the shape of morphological structures. Possible prospects for the practical application of these approaches for the study of fossil material and the search for ancestral lineages of modern shrews among Crocidosoricinae are described.

Promiscuity in the Andes: Species Relationships in Polylepis (Rosaceae, Sanguisorbeae) Based on AFLP and Morphology

2006 ◽  
Vol 31 (3) ◽  
pp. 547-559 ◽  
Author(s):  
Alexander N. Schmidt-Lebuhn ◽  
Michael Kessler ◽  
Mahendra Kumar
Keyword(s):  
Morphological Analysis ◽  
Phylogenetic Signal ◽  
Morphological Data ◽  
Aflp Analysis ◽  
Species Relationships ◽  
Geographic Proximity ◽  
The Andes ◽  
Hybridization And Introgression

AFLP and morphological data were used to reconstruct the phylogeny of Polylepis (Rosaceae). Results from the morphological analysis correlate well with earlier hypotheses about the evolution of the genus, showing a transition from tall, thin-leaved trees with large inflorescences to small trees with thick leaves and reduced inflorescences. While a basic phylogenetic signal is also discernible in the AFLP analysis, it is partly eclipsed in that samples from different species sometimes cluster according to geographic proximity rather than systematic affiliation. This structure is interpreted as indicative of frequent hybridization and introgression.

The genus Synura (Synurales, Synurophyceae) in small urban rivers of Nizhniy Novgorod

2017 ◽  
Vol 51 ◽  
pp. 57-70 ◽  
Author(s):  
E. S. Gusev ◽  
O. S. Perminova ◽  
N. A. Startseva ◽  
A. G. Okhapkin
Keyword(s):  
Taxonomic Composition ◽  
Morphological Data ◽  
Small Rivers ◽  
Urban Rivers ◽  
Large Lakes ◽  
Volga River ◽  
Volga River Basin ◽  
Means Of Transmission ◽  
Special Studies ◽  
The City

The latest special studies of the genus Synura in Russia were conducted in the 1970s. In the last decade, 14 new species of the genus were described based on molecular and morphological data. The total number of valid taxa of the genus has increased to 49. Only 18 taxa of Synura are known in Russia up to date, and the diver sity of the genus on this huge territory is strongly underestimated. Previous studies of the genus were focused mainly on large lakes or reservoirs. To reveal a more complete flora, it is necessary to include other habitats into account. Small urban rivers can be prospective habitats for interesting taxa including synuralean algae. Our study focuses on the taxonomic composition of the genus Synura in four small rivers in Nizhniy Novgorod (European Russia): Chyornaya, Levinka, Borzovka and Rzhavka. All the rivers flow in the city and fall under strong anthropogenic impact. The genus Synura was studied by means of transmission and scanning electron microscopy during 2011, 2012, 2014, 2015. In total, eight species and one form of Synura have been found: S. conopea, S. curtispina, S. echinulata, S. glabra, S. macropora, S. petersenii, S. spinosa f. spinosa, S. spinosa f. longispina, S. uvella. All nine taxa were observed in the river Chyornaya. Five taxa were found in the rivers Levinka, Borzovka and Rzhavka. One species (Synura conopea) is a new record to the flora of Russia. It was found in all studied rivers. Four taxa (S. conopea, S. glabra, S. macropora, S. spinosa f. longispina) are new records to the Middle Volga river basin.

Sampling, Preservation and Counting of Samples II: Zooplankton

2017 ◽  
Author(s):  
Peter H. Wiebe ◽  
Ann Bucklin ◽  
Mark Benfield
Keyword(s):  
Genetic Analysis ◽  
High Speed ◽  
Morphological Analysis ◽  
Taxonomic Composition ◽  
Sampling Techniques ◽  
Sample Analysis ◽  
Sample Preservation ◽  
The Past ◽  
Plankton Collection

This chapter reviews traditional and new zooplankton sampling techniques, sample preservation, and sample analysis, and provides the sources where in-depth discussion of these topics is addressed. The net systems that have been developed over the past 100+ years, many of which are still in use today, can be categorized into eight groups: non-opening/closing nets, simple opening/closing nets, high-speed samplers, neuston samplers, planktobenthos plankton nets, closing cod-end samplers, multiple net systems, and moored plankton collection systems. Methods of sample preservation include preservation for sample enumeration and taxonomic morphological analysis, and preservation of samples for genetic analysis. Methods of analysis of zooplankton samples include determination of biomass, taxonomic composition, and size by traditional methods; and genetic analysis of zooplankton samples.

Stimulation and limits of cloud-based ITSM system application by Russian companies

2021 ◽  
Vol 19 (10) ◽  
pp. 2001-2010
Author(s):  
Yurii P. KISHKOVICH
Keyword(s):  
Information Systems ◽  
Comparative Analysis ◽  
Financial Performance ◽  
System Application ◽  
Management System ◽  
Business Processes ◽  
Enterprise Management ◽  
Practical Application ◽  
Russian Economy ◽  
Enterprise Management System

Subject. This article discusses the use of information systems in various spheres of the Russian economy. Objectives. The article aims to assess the prospects for the use of cloud-based ITSM systems by Russian medium-sized and large companies. Methods. For the study, I used a comparative analysis. Results. The article finds that the cloud-based ITSM system reduces the time of business processes significantly and saves money resources. Conclusions. The practical application of cloud-based ITSM systems expands the opportunities and capabilities of medium-sized and large enterprises significantly and contributes to improving the financial performance of their activities. The enterprise management system is an important factor the implementation of these systems depends on.

Alpha-taxonomy and phylogeny of African Junoniini butterflies based on morphological data, with an emphasis on genitalia, and COI barcode (Lepidoptera: Nymphalidae)

Zootaxa ◽  
2021 ◽  
Vol 4991 (3) ◽  
pp. 401-433
Author(s):  
TOMASZ W. PYRCZ ◽  
KLAUDIA FLORCZYK ◽  
STEVE COLLINS ◽  
SZABOLCS SÁFIÁN ◽  
OSCAR MAHECHA-J. ◽  
...  
Keyword(s):  
Male Genitalia ◽  
Morphological Analysis ◽  
Cladistic Analysis ◽  
Central Africa ◽  
Molecular Data ◽  
Morphological Data ◽  
East African ◽  
East African Coast ◽  
Afrotropical Region ◽  
Close Relationship

The tribe Junoniini is a predominantly Paleotropical group of the cosmopolitan butterfly subfamily Nymphalinae (Nymphalidae), with highest diversity in the Afrotropical region. Its systematics and relationships are not entirely resolved. Question marks remain concerning the validity of some genera; and the apparently close relationship between the Indo-Australian genus Yoma and the Afrotropical Protogoniomorpha, as evidenced by molecular phylogenies, remains a puzzle. Here, we present a cladistic analysis, based on 42 characters of the male and female genitalia of 41 species of Junoniini belonging to six genera, nearly all of them continental Afrotropical, and 3 species of two Indo-Australian genera Yoma and Rhinopalpa. A ML COI-based tree is produced for 36 species of Afrotropical Junoniini and Yoma. The molecular data are consistent with previous studies. However, morphological analysis does not confirm a close relationship between Protogoniomorpha and Yoma. Despite the evolution of a number of modifications, the male genitalia within all genera and species of the Junoniini share a cohesive build plan, in particular a transformed sacculus, from which Yoma is highly divergent. The position of the genus Kamilla, previously synonymized with Junonia, is discussed. Three East African coast taxa, Junonia elgiva stat. reinst., Protogoniomorpha nebulosa stat. reinst. and Salamis amaniensis stat. reinst., and one from central Africa, Precis silvicola stat. reinst. are raised to species level, based on comparative analysis of their male genitalia.  

scholarly journals Mapping occipital bone thickness using computed tomography for safe screw placement

2015 ◽  
Vol 23 (2) ◽  
pp. 254-258 ◽  
Author(s):  
Tomonori Morita ◽  
Tsuneo Takebayashi ◽  
Hiroyuki Takashima ◽  
Mitsunori Yoshimoto ◽  
Kazunori Ida ◽  
...  
Keyword(s):  
Morphological Analysis ◽  
Reference Range ◽  
Occipital Bone ◽  
Institutional Review Board ◽  
Morphological Data ◽  
Screw Placement ◽  
Female Group ◽  
Bone Thickness ◽  
Institutional Review ◽  
Neck Disease

OBJECT Safe and effective insertion of occipital bone screws requires morphological analysis of the occipital bone, which is poorly documented in the literature. The authors of this study present morphological data for determining the area of screw placement for optimal internal fixation. METHODS The subjects of this institutional review board-approved retrospective study were 105 individuals without head and neck disease who underwent CT imaging at the authors’ hospital. There were 55 males and 50 females, with a mean age of 57.1 years (range 20–91 years). Measurements using CT were taken according to a matrix of 55 points following a grid with 1-cm spacing based on the external occipital protuberance (EOP). RESULTS The maximum thickness of the occipital bone was at the level of the EOP at 16.4 mm. Areas with thicknesses > 8 mm were more frequent at the EOP and up to 2 cm in all directions, as well as up to 1 cm in all directions at a height of 1 cm inferiorly, and up to 3 cm from the EOP inferiorly. The male group tended to have a thicker occipital bone than the female group, and the differences were significant around the EOP. The ratio of the trabecular bone to the occipital bone thickness was > 30% in the central region. At positions more than 2 cm laterally, the ratio was < 15%, and the ratio gradually decreased further laterally. CONCLUSIONS Screws that are 8 mm long can be placed in the area extending 2 cm laterally from the EOP at the level of the superior nuchal line and approximately 3 cm inferior to the center. These results suggest that it may be possible to effectively insert a screw over a wider area than the conventional reference range.

scholarly journals Analysis of diagnostic possibilities of radio- logic and CT examination for pelvic injuries in children

1996 ◽  
Vol 3 (2) ◽  
pp. 45-48
Author(s):  
E. M. Kil’dyushov ◽  
I. V. Buromsky ◽  
V. M. Rozinov ◽  
L. E. Kuznetsov
Keyword(s):  
Comparative Analysis ◽  
Morphological Data ◽  
Ray Method ◽  
Diagnostic Reliability ◽  
X Ray ◽  
Ct Examination ◽  
Radiologic Examination ◽  
Pelvic Injuries

The purpose of this report is the determination of the diagnostic reliability of routine radiologic and CT examinations for pelvic injuries in children. The comparative analysis of these examinations and postmortem morphologic studies of pelvic spesimens was performed in 10 children, aged 2-12 years. It was shown that the X-ray method allowed to diagnose only 47.37% and CT method - 76.32% of all real pelvic injuries (by morphological data) in those children. However, the detectability of damage of the structures that formed the anterior pelvic semi-ring was 50% by radiologic examination, and 60% by CT examination, while for the structures forming posterior pelvic semi-ring it was 44.44% and 94.44%, respectively.

scholarly journals Comparative Cladistics: Fossils, Morphological Data Partitions and Lost Branches in the Fossil Tree of Life

2017 ◽  
Author(s):  
Ross Mounce
Keyword(s):  
Large Scale ◽  
Phylogenetic Signal ◽  
Scientific Progress ◽  
Molecular Data ◽  
Morphological Data ◽  
Data Sets ◽  
Phylogenetic Groups ◽  
Use Of Data ◽  
Wide Range ◽  
Cladistic Analyses

In this thesis I attempt to gather together a wide range of cladistic analyses of fossil and extant taxa representing a diverse array of phylogenetic groups. I use this data to quantitatively compare the effect of fossil taxa relative to extant taxa in terms of support for relationships, number of most parsimonious trees (MPTs) and leaf stability. In line with previous studies I find that the effects of fossil taxa are seldom different to extant taxa – although I highlight some interesting exceptions. I also use this data to compare the phylogenetic signal within vertebrate morphological data sets, by choosing to compare cranial data to postcranial data. Comparisons between molecular data and morphological data have been previously well explored, as have signals between different molecular loci. But comparative signal within morphological data sets is much less commonly characterized and certainly not across a wide array of clades. With this analysis I show that there are many studies in which the evidence provided by cranial data appears to be be significantly incongruent with the postcranial data – more than one would expect to see just by the effect of chance and noise alone. I devise and implement a modification to a rarely used measure of homoplasy that will hopefully encourage its wider usage. Previously it had some undesirable bias associated with the distribution of missing data in a dataset, but my modification controls for this. I also take an in-depth and extensive review of the ILD test, noting it is often misused or reported poorly, even in recent studies. Finally, in attempting to collect data and metadata on a large scale, I uncovered inefficiencies in the research publication system that obstruct re-use of data and scientific progress. I highlight the importance of replication and reproducibility – even simple reanalysis of high profile papers can turn up some very different results. Data is highly valuable and thus it must be retained and made available for further re-use to maximize the overall return on research investment.

scholarly journals Characteristics of heat ceramics of Mordovian territory: on the example of the collection of Mordovian republican S. D. Erzia Fine Art Museum

2019 ◽  
Vol 11 (2) ◽  
pp. 222-231
Author(s):  
Andrey S. Barmenkov
Keyword(s):  
Comparative Analysis ◽  
Morphological Analysis ◽  
Fine Art ◽  
Art Museum ◽  
Maximum Extension ◽  
Different Types ◽  
The Subject ◽  
Functional Purpose

Introduction. The article is devoted to the description of pottery ceramics on Mordovian territory. The purpose of the article is to analyze the development of ceramics in Mordovian region. The object of the article is a collection of ceramics of Mordovian republican S.D. Erzia Fine Art Museum, the subject – the main features of the ceramics based on the morphological analysis of its exhibits. Materials and Methods. The material of the study was the results of the research of Russian scholars on ceramics of antiquity and modernity, as well as empirical materials presented by the ceramics funds of Mordovian republican S.D. Erzia Fine Art Museum. One of the main approaches implemented in the article is a comparative analysis of the exhibits based on the color of the shard. It allows the author to systematize utensils according to their functional purpose, and also to make an assumption about the various historical stages of the emergence of different types. Results and Discussion. The article systematizes the variety of forms of ceramics, reveals their quantitative relationships, the prevailing forms, and gives the comparative analysis of the existing forms. The classification of vessels was carried out in accordance with a number of criteria: the height and thickness of the neck, the design of the corolla cut, the diameter of the mouth and the maximum extension of the trunk, which allows one to draw conclusions about the similarity of the collection’s exhibits with other Mordоvian artefacts. Conclusion. It concludes about the existence of a certain standard in the production of ceramic dishes, and on the similarity of the studied ceramics and the collections of Russian monuments. Therefore, it states the preservation of local Mordovian pottery traditions in the course of wide interactions with Russian pottery ceramics.

scholarly journals Importance of the postcranial skeleton in eusuchian phylogeny: Reassessing the systematics of allodaposuchid crocodylians

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0251900
Author(s):  
Alejandro Blanco
Keyword(s):  
Current Knowledge ◽  
Phylogenetic Signal ◽  
Morphological Data ◽  
Phylogenetic Position ◽  
Postcranial Skeleton ◽  
Skull Morphology ◽  
Taxonomic Descriptions ◽  
The Family ◽  
Phylogenetic Hypotheses ◽  
Internal Relationships

Our current knowledge on the crocodyliform evolution is strongly biased towards the skull morphology, and the postcranial skeleton is usually neglected in many taxonomic descriptions. However, it is logical to expect that it can contribute with its own phylogenetic signal. In this paper, the changes in the tree topology caused by the addition of the postcranial information are analysed for the family Allodaposuchidae, the most representative eusuchians in the latest Cretaceous of Europe. At present, different phylogenetic hypotheses have been proposed for this group without reaching a consensus. The results of this paper evidence a shift in the phylogenetic position when the postcranium is included in the dataset, pointing to a relevant phylogenetic signal in the postcranial elements. Finally, the phylogenetic relationships of allodaposuchids within Eusuchia are reassessed; and the internal relationships within Allodaposuchidae are also reconsidered after an exhaustive revision of the morphological data. New and improved diagnoses for each species are here provided.

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