Morphological Characteristics and Sex Classification of Red-Legged Partridge

1985 ◽  
Vol 49 (1) ◽  
pp. 228 ◽  
Author(s):  
Dominique Pepin
Keyword(s):  
Morphological Characteristics

RHYNCHOLITES AND THE PROBLEM OF NARROW AND BROAD CONCEPTION OF TAXONS

2018 ◽  
pp. 12-17 ◽  
Author(s):  
I. R. Khuzina ◽  
V. N. Komarov
Keyword(s):  
Sexual Dimorphism ◽  
Morphological Characteristics ◽  
Mass Scale ◽  
Individual Variability ◽  
Point Of View ◽  
The Other ◽  
New Taxon ◽  
Artificial System ◽  
Broad Understanding

The paper considers a point of view, based on the conception of the broad understanding of taxons. According to this point of view, rhyncholites of the subgenus Dentatobeccus and Microbeccus are accepted to be synonymous with the genus Rhynchoteuthis, and subgenus Romanovichella is considered to be synonymous with the genus Palaeoteuthis. The criteria, exercising influence on the different approaches to the classification of rhyncholites, have been analyzed (such as age and individual variability, sexual dimorphism, pathological and teratological features, degree of disintegration of material), underestimation of which can lead to inaccuracy. Divestment of the subgenuses Dentatobeccus, Microbeccus and Romanovichella, possessing very bright morphological characteristics, to have an independent status and denomination to their synonyms, has been noted to be unjustified. An artificial system (any suggested variant) with all its minuses is a single probable system for rhyncholites. The main criteria, minimizing its negative sides and proving the separation of the new taxon, is an available mass-scale material. The narrow understanding of the genus, used in sensible limits, has been underlined to simplify the problem of the passing the view about the genus to the other investigators and recognition of rhyncholites for the practical tasks.

scholarly journals Morphological Characteristics, Classifications and Difficulties in the Use of Diagnostic Criteria for Serrated Lesions of the Large Intestine

2021 ◽  
Author(s):  
Cesar de Souza Bastos Junior ◽  
Vera Lucia Nunes Pannain ◽  
Adriana Caroli-Bottino
Keyword(s):  
Diagnostic Criteria ◽  
Morphological Characteristics ◽  
World Health ◽  
Diagnostic Tools ◽  
Serrated Adenoma ◽  
The Past ◽  
The World ◽  
Serrated Lesions ◽  
Health Organization

Abstract Introduction Colorectal carcinoma (CRC) is the most common gastrointestinal neoplasm in the world, accounting for 15% of cancer-related deaths. This condition is related to different molecular pathways, among them the recently described serrated pathway, whose characteristic entities, serrated lesions, have undergone important changes in their names and diagnostic criteria in the past thirty years. The multiplicity of denominations and criteria over the last years may be responsible for the low interobserver concordance (IOC) described in the literature. Objectives The present study aims to describe the evolution in classification of serrated lesions, based on the last three publications of the World Health Organization (WHO) and the reproducibility of these criteria by pathologists, based on the evaluation of the IOC. Methods A search was conducted in the PubMed, ResearchGate and Portal Capes databases, with the following terms: sessile serrated lesion; serrated lesions; serrated adenoma; interobserver concordance; and reproducibility. Articles published since 1990 were researched. Results and Discussion The classification of serrated lesions in the past thirty years showed different denominations and diagnostic criteria. The reproducibility and IOC of these criteria in the literature, based on the kappa coefficient, varied in most studies, from very poor to moderate. Conclusions Interobserver concordance and the reproducibility of microscopic criteria may represent a limitation for the diagnosis and appropriate management of these lesions. It is necessary to investigate diagnostic tools to improve the performance of the pathologist's evaluation, for better concordance, and, consequently, adequate diagnosis and treatment.

scholarly journals Early Iron Age Sword from the Territory of the Middle Yenisei

2021 ◽  
Vol 20 (7) ◽  
pp. 135-143
Author(s):  
Oleg A. Mitko ◽  
Sergey G. Skobelev
Keyword(s):  
Iron Age ◽  
Low Carbon Steel ◽  
Morphological Characteristics ◽  
Early Iron Age ◽  
Low Carbon ◽  
North Caucasus ◽  
Group Iii ◽  
The North ◽  
Minusinsk Basin

Purpose. The article is devoted to the characteristics of a double-edged iron sword, which can be attributed to the unique phenomena of the early Iron Age of the Minusinsk Basin. Results. According to its morphological characteristics, the sword is an increased technological modification of the traditional Tagar dagger. The total length of the sword is 59.5 cm; the width of the lenticular blade in cross-section is about 7 cm. The handle with a volute-like pommel is separated from the blade by a narrow butterfly-shaped crosshair. The length of the hilt is 8 cm, which corresponds to the size of the hilts of most Scythian swords. This is a very small size, since in men the average palm width is about 12 cm. Probably, the rounded outlines of the pommel and narrow crosshairs allow, due to their shape, to hold the short handle of a heavy sword more tightly. Conclusion. According to the classification of O. I. Kura, Scythian swords with a narrow butterfly-shaped crosshair and volute-like pommel are included in Group III, Type II A2 dating from the end of the 5th – 4th centuries BC, which corresponds to the boundary between the Podgorny and Saragashen stages of the Tagar culture. The earliest form of sword hilts with typologically similar forms of crosshairs (kidney-shaped, heart-shaped, butterfly-shaped) with bar-shaped pommels appeared in the North Caucasus in the first half of the 7th century BC. On the territory of the Minusinsk Basin, most morphologically similar daggers are usually dated to the 6th – 4th centuries BC. Before the discovery of the Krasnoyarsk sword, long-bladed iron weapons were not known there. At the same time, swords of the Scythian time were found in the nearest regions of Altai and Kazakhstan. The later appearance of the technology for processing iron in the Minusinsk Basin makes it possible to consider the Krasnoyarsk sword an import item. According to another hypothesis, it belongs to the period of the late 3rd – 2nd centuries BC, when local craftsmen mastered the processing of iron and began to make massive quantities of weapons and tools from low-carbon steel. In doing so, they copied traditional archaic forms.

scholarly journals Characterization of Five New Earthworm Mitogenomes (Oligochaeta: Lumbricidae): Mitochondrial Phylogeny of Lumbricidae

Diversity ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 580
Author(s):  
Hongyi Liu ◽  
Yufeng Zhang ◽  
Wei Xu ◽  
Yu Fang ◽  
Honghua Ruan
Keyword(s):  
Phylogenetic Trees ◽  
Mitochondrial Gene ◽  
Morphological Characteristics ◽  
Molecular Techniques ◽  
Phylogenetic Studies ◽  
Octolasion Tyrtaeum ◽  
Eisenia Nordenskioldi ◽  
Novel Strategy

Identification based on conventional morphological characteristics is typically difficult and time-consuming. The development of molecular techniques provides a novel strategy that relies on specific mitochondrial gene fragments to conduct authentication. For this study, five newly sequenced partial mitogenomes of earthworms (Bimastos parvus, Dendrobaena octaedra, Eisenia andrei, Eisenia nordenskioldi, and Octolasion tyrtaeum) with lengths ranging from 14,977 to 15,715 were presented. Each mitogenome possessed a putative control region that resided between tRNA-Arg and tRNA-His. All of the PCGs were under negative selection according to the value of Ka/Ks. The phylogenetic trees supported the classification of Eisenia and Lumbricus; however, the trees based on cox1 did not. Through various comparisons, it was determined that cox1 fragments might be more suitable for molecular identification. These results lay the foundation for further phylogenetic studies on Lumbricidae.

scholarly journals Classification of Hallucal Sesamoid Bone Correlated with Hallux Valgus Severity

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Lei Zhang ◽  
Junqiu Wang ◽  
Jiaju Liu ◽  
Jiangqin Luo
Keyword(s):  
Hallux Valgus ◽  
Statistical Difference ◽  
Three Dimensional ◽  
Morphological Characteristics ◽  
Metatarsophalangeal Joint ◽  
Metatarsal Head ◽  
Type I ◽  
Sesamoid Bone ◽  
First Metatarsophalangeal Joint

The hallucal sesamoid bones (HSBs), having an important role in reducing load per unit area on the first metatarsal head, can be injured commonly which also affected the first metatarsophalangeal joint and the surrounding structure. Meanwhile, differences among each HSB type may be a major factor affecting the occurrence and development of HV. So far, many researchers had learned that there are three different conditions in hallucal sesamoid bone affecting the choice of clinical surgery corresponding to different solutions in clinic. Thus, it is necessary to study the anatomical morphological characteristics of the HSB which can be helpful in clinical diagnosis and treatment, especially hallux valgus (HV). 150 X-ray and three-dimensional (3D) computed tomographic (CT) images consist of 72 left and 78 right metatarsals were applied in this anatomic study between two variables and showed by a simple scatter plot. The first metatarsophalangeal joint is divided into four different types: type I (no HSB, 1.3%), type II (with one HSB, 0.07%), type IIIa (with two HSBs when THB is bigger, 28%), type IIIb (with two HSBs when FHB is bigger, 65.3%), and type IV (with three HSBs, 4.7%). There was no statistical difference between the left and right sides, except HVA, Meary, and pitch (P<0.05); all a, b, c, d, and i have statistical difference between male and female (P<0.05). Meanwhile, HVA and IMA and HVA and type group have a significant correlation. In summary, HVA and IMA and HVA and classification of HSBs have significant correlations. The classification and location of HSBs can be an important basis to choose operation methods and postoperation evaluation.

scholarly journals Morphological Classification of the Ear Components and the Correlation between Morphological Characteristics in Each Component

2009 ◽  
Vol 14 (2) ◽  
pp. 61-70 ◽  
Author(s):  
Hiroyuki Moriyoshi ◽  
Miki Miyoshi ◽  
Daiki Hino ◽  
Hideki Nakayama ◽  
Toshio Morikawa ◽  
...  
Keyword(s):  
Morphological Characteristics ◽  
Morphological Classification

scholarly journals Descriptions of diplostomid metacercariae (Digenea: Diplostomidae) from freshwater fishes in the Tshwane area

2013 ◽  
Vol 80 (1) ◽  
Author(s):  
Esmey B.E. Moema ◽  
Pieter H. King ◽  
Johnny N. Rakgole ◽  
Chantélle Baker
Keyword(s):  
Clarias Gariepinus ◽  
Morphological Characteristics ◽  
Molecular Techniques ◽  
Cranial Cavity ◽  
Base Pairs ◽  
Parasitic Species ◽  
Larval Stages ◽  
Digenetic Trematodes ◽  
Genomic Regions

The metacercarial (larval) stages of diplostomid digeneans are known to inhabit freshwater fish, causing tissue damage in the process. Due to their widespread diversity, little is known about their life cycle. The classification of these parasitic stages to the species level using only the morphology is very challenging due to the lack of genitalia; they are regarded to be the most important structures in the identification of these organisms. In this study, additional morphological information through light and scanning electron microscopy is given for two different diplostomids found in the cranial cavity of Clarias gariepinus and the vitreous chambers of Tilapia sparrmanii and Pseudocrenilabrus philander. The diplostomid metacercaria inhabiting the cranial cavity of Clarias gariepinus was morphologically identified as Diplostomulum (Tylodelphys) mashonenseand an unknown metacercaria of the genus Diplostomumwas found in the vitreous chambers of Pseudocrenilabrus philander and Tilapia sparrmanii. Both parasitic species’ 28S recombinant deoxyribonucleic acid genomic regions were successfully amplified using Dig 125/1500R primer pairs. The assay yielded a product of approximately 1300 base pairs as seen on the gel images. There were 14 nucleotide differences over the entire analysed sequences resulting in a 1.1% (14/1273) nucleotide difference. In line with the morphological characteristics of these parasites, there seemed to be a slight difference in their genetic makeup. The application of molecular techniques on digenetic trematodes seems very promising and may yield great potential in future descriptions of morphologically similar parasitic species.

scholarly journals Morphology and molecular evaluation of Iphinoe spelaeobios gen. nov., sp. nov. and Loriellopsis cavernicola gen. nov., sp. nov., two stigonematalean cyanobacteria from Greek and Spanish caves

2011 ◽  
Vol 61 (12) ◽  
pp. 2907-2915 ◽  
Author(s):  
V. Lamprinou ◽  
M. Hernández-Mariné ◽  
T. Canals ◽  
K. Kormas ◽  
A. Economou-Amilli ◽  
...  
Keyword(s):  
Morphological Characteristics ◽  
Molecular Data ◽  
Rrna Gene ◽  
Genetic Traits ◽  
Transmission Electron ◽  
Different Strains ◽  
Taxonomic Groups ◽  
Type V ◽  
Micro Organisms

Caves have generally been found to host phototrophic micro-organisms from various taxonomic groups, with cyanobacteria comprising an important group that have adapted to these stable and highly specific environments. A polyphasic study based on aspects of classical morphology and molecular data revealed two new monospecific genera from fresh material of Greek and Spanish caves. Both taxa are characterized by obligatory true branching (T-type, V-type and false branching), the presence of heterocysts, and reproduction by hormocysts and akinetes. They shared some similarities in their morphological characteristics as revealed by light, scanning electron and transmission electron microscopy, but phylogenetic analysis based on 16S rRNA gene sequences showed that the two phylotypes were different (89.8 % similarity); this represents an example of shared morphology in genetically different strains of cave-adapted species. Phenotypic and genetic traits strongly support classification of the phylotypes as independent taxa in the order Stigonematales (the most differentiated and complicated group of cyanobacteria), family Loriellaceae Geitl 1925. Hence, the names Iphinoe spelaeobios Lamprinou and Pantazidou gen. nov., sp. nov. and Loriellopsis cavernicola Hernández-Mariné and Canals gen. nov., sp. nov. are proposed.

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