Sieve-type pore canals in the Timiriaseviinae—A contribution to the comparative morphology and the systematics of the Limnocytheridae (Ostracoda, Crustacea)

Zootaxa ◽  
2018 ◽  
Vol 4495 (1) ◽  
pp. 1 ◽  
Author(s):  
DAN L. DANIELOPOL ◽  
M. CRISTINA CABRAL ◽  
ALAN LORD ◽  
PIERRE CARBONEL ◽  
MARTIN GROSS ◽  
...  
Keyword(s):  
Comparative Morphology ◽  
Living Animal ◽  
Detailed Structure ◽  
The Family ◽  
New Tribe ◽  
Definition Of ◽  
Pore Canals ◽  
New Evidence ◽  
The Relationship ◽  
Scanning Electron

Examination of normal pore canals, especially sieve-type pore canals, in living and fossil representatives of ten genera of the family Limnocytheridae, subfamily Timiriaseviinae, has revealed important diversity of structure. These complex pore canals have been studied via high-resolution scanning electron microscopy (the Cartographic Method) and analysed via the application of newly devised indices to assess patterns of consistency and variation in both detailed structure of individual pores and of their distribution on the calcified valve. The timiriaseviine taxa are compared with species of the genera Limnocythere, sub-family Limnocytherinae and Cyprideis (family Cytherideidae). The relationship between the living animal and its aquatic environment is discussed in the light of previous studies and of new evidence herein. The importance of normal pore canals for systematics is highlighted by the recognition and definition of the new tribe Gomphodellini Danielopol, Cabral & Lord nov. tribe, subfamily Timiriaseviinae, family Limnocytheridae. 

Femininity, Post-Fordism, and the ‘New Traditionalism’

1993 ◽  
Vol 11 (6) ◽  
pp. 689-708 ◽  
Author(s):  
D A Leslie
Keyword(s):  
Gender Relations ◽  
Female Identity ◽  
Space And Place ◽  
Private Sphere ◽  
The Family ◽  
Home Space ◽  
Definition Of ◽  
The Relationship ◽  
Cultural Shifts

In this paper I explore the links between identity and space, and in particular the relationship between female identity, consumption, and the space of the home. I argue for the centrality of images to the construction of femininity. Through a case study of contemporary representations of the family and traditionalism in advertising, I illustrate how advertisers exploit tensions in femininity, and in turn mediate and negotiate these tensions. Alongside the economic and cultural shifts associated with post-Fordism, a reorganization of gender relations is taking place. A ‘new traditionalism’ in advertising, as one of a number of significant female consumer identities, is an attempt to redefine women's roles in line with a nostalgic discourse of familialism and a return to the private sphere of the home. Space and place are central to the definition of the ‘new traditionalist’ woman.

War, Diplomacy and Social Mobility: The Casali Family in the Service of Henry VIII

2010 ◽  
Vol 14 (6) ◽  
pp. 559-578
Author(s):  
Catherine Fletcher
Keyword(s):  
Sixteenth Century ◽  
Social Status ◽  
Social Mobility ◽  
Financial Resources ◽  
Henry Viii ◽  
The Family ◽  
New Evidence ◽  
The Relationship

AbstractBy employing Gregorio Casali as his permanent representative at the curia from 1525, King Henry VIII of England acquired a diplomatic structure not uncommon in sixteenth-century Europe: the family consortium. This article illustrates the functioning of that structure, presenting new evidence relating to Casali’s background and career, and assessing both the benefits that accrued to the English crown as a consequence of his employment, and the advantages that Casali and his family acquired through their service to a foreign prince. It argues that the concept of “credit” both in a metaphorical and financial sense offers a useful means of understanding the relationship between the Casali family and the English crown in the 1520s and 1530s. As the family made available to their patrons their social and financial resources at the curia, in turn their role as representatives of a leading European prince served to enhance their social status.

scholarly journals Comparative morphology of gill glands in externally fertilizing and inseminating species of cheirodontine fishes, with implications on the phylogeny of the family Characidae (Actinopterygii: Characiformes)

2012 ◽  
Vol 10 (2) ◽  
pp. 349-360 ◽  
Author(s):  
Cristina L. C. de Oliveira ◽  
Luiz R. Malabarba ◽  
John R. Burns
Keyword(s):  
Electron Microscopy ◽  
Common Ancestor ◽  
Comparative Morphology ◽  
Variable Number ◽  
Single Origin ◽  
Clade B ◽  
Transmission Electron ◽  
The Family ◽  
Gill Filaments ◽  
Scanning Electron

The structure and form of gill gland among inseminating and externally fertilizing species of the Cheirodontinae are described under light microscopy, scanning electron microscopy, and transmission electron microscopy, and compared to other members of the family Characidae. At least one species from thirteen cheirodontine genera were analyzed, totaling seventeen species. Gill glands were found in all analyzed mature males of Cheirodontinae and were always absent in females, being located on the anteriormost portion of the lower branch of the first gill arch, extending posteriorly through a variable number of gill filaments. Gill glands of all cheirodontines and of all characid species in which this organ has been described possess the same structure, being considered homologous and supporting a single origin of the structure in a common ancestor to Clade A and Clade B characids.

scholarly journals Newly discovered associations between peritrich ciliates (Ciliophora: Peritrichia) and scale polychaetes (Annelida: Polynoidae and Sigalionidae) with a review of polychaete–peritrich epibiosis

2019 ◽  
Author(s):  
Barbara Mikac ◽  
Federica Semprucci ◽  
Loretta Guidi ◽  
Massimo Ponti ◽  
Marco Abbiati ◽  
...  
Keyword(s):  
Original Description ◽  
First Record ◽  
Careful Attention ◽  
The North ◽  
Ciliate Species ◽  
The Family ◽  
Widespread Phenomenon ◽  
First Time ◽  
The Relationship ◽  
Scanning Electron

Abstract In this research, we report the presence of two ciliate protozoans of the subclass Peritrichia, Cothurnia amphicteis and C. peloscolicis, as epibionts on the chaetae of scaled polychaetes Malmgrenia lilianae, M. andreapolis (fam. Polynoidae) and Sthenelais boa (fam. Sigalionidae), from the north Adriatic (Mediterranean Sea). Both ciliate species are herein found for the first time after their original description and are redescribed, based on light and scanning electron microscopy analyses. This is the first record of an association between ciliates and polychaetes of the family Sigalionidae. Our results suggest that these host–epibiont relationships might be highly specific. We also present the first review of epibiosis between polychaetes and peritrich ciliates, indicating that this relationship is more diverse than previously thought. Forty taxa of peritrich ciliates from 12 genera and seven families are recorded as epibionts on polychaetes, while 48 polychaete taxa are known as their hosts. The relationship can be considered ectocommensalism, where the ciliates have the advantages of increased food availability. This association might be a more widespread phenomenon than currently known, because it could be easily overlooked or misinterpreted. It, therefore, deserves careful attention and further investigation.

The history, biology, and taxonomy of the Cytophaga group

1977 ◽  
Vol 23 (12) ◽  
pp. 1599-1653 ◽  
Author(s):  
Penelope J. Christensen
Keyword(s):  
Vegetative Cell ◽  
Cell Structure ◽  
Species Conservation ◽  
Species Differentiation ◽  
Historical Account ◽  
The Family ◽  
History Of ◽  
Definition Of ◽  
Relationship Of ◽  
The Relationship

The first section of this review covers the important characteristics of the genera Cytophaga and Sporocytophaga. The topics discussed include vegetative cell structure, the spreading habit, and degradation of macromolecules.A historical account of these two genera follows, together with a discussion on the definition of, and species differentiation within the genus Cytophaga, and on the taxonomy of Sporocytophaga.The third section deals with the relationships of the cytophagas with the flavobacteria and includes a brief history of Flavobacterium, reassignation of some species to Cytophaga, differentiation from Cytophaga, and a discussion on the definition of the genus Flavobacterinm.This is followed by a section dealing with the relationship of Cytophaga with the flexibacteria, starting with an introduction to the diversity of flexing organisms and taxonomic developments, and proceeding with the differentiation within the family Cytophagaceae, and species differentiation in Flexibacter.The concluding section includes a proposed redefinition of Cytophaga, a proposal regarding species conservation in this genus, and discussions on the relationship between the cytophagas and the myxobacteria and on the significance of cytophagas in the environment.The characteristics of all described species of Cytophaga, Flexibacter, and relevant flavobacteria are tabulated and a bibliography is presented.

scholarly journals Stylized Facts and Experimentation

2016 ◽  
Author(s):  
Charles Crabtree
Keyword(s):  
Social Sciences ◽  
Causal Relationships ◽  
Stylized Facts ◽  
Exact Role ◽  
The Social ◽  
Definition Of ◽  
New Evidence ◽  
The Relationship

In this comment, we clarify and extend Hirschman (2016)’s discussion on ‘stylized facts.’ Our focus is on the relationship between stylized facts and experimentation. Given the continued increase in experimentation across the social sciences, we think that it is important to consider the exact role that experiments play in the production and testing of stylized facts. We make three related contributions here. First, we describe how experiments can both provide new evidence to support existing stylized facts as well as produce new stylized facts. Second, we argue that the stylized facts produced through experimentation differ from other stylized facts. Third, we extend Hirschman (2016)’s definition of ‘stylized facts’ so that it distinguishes between those that describe correlation relationships and those that describe causal relationships.

Schumann and Romantic Distance

1997 ◽  
Vol 50 (1) ◽  
pp. 55-132 ◽  
Author(s):  
Berthold Hoeckner
Keyword(s):  
Robert Schumann ◽  
Piano Sonata ◽  
Jean Paul ◽  
An Die Ferne Geliebte ◽  
Definition Of ◽  
New Evidence ◽  
The Relationship

The poetic trope and aesthetic category of "distance" is central to Novalis's and Jean Paul Richter's definition of the Romantic, as embodied in dying sound and distant music. In the "young poetic future" proposed by the composer and critic Robert Schumann in the 1830s, romantic distance figures prominently, exemplified by the relationship between the endings of Jean Paul's Flegeljahre and Schumann's Papillons, Op. 2. Distance also provides the key for a new understanding of the relationship between analysis and poetic criticism in Schumann's review of Schubert's Great C-Major Symphony; between texted and untexted music in his Piano Sonata, Op. 11; between music and landscape in Davidsbündlertänze, Op. 6; and between the composer and his distant beloved in the Fantasie, Op. 17 and the Novelletten, Op. 21. The article presents new evidence of Schumann's reference to Beethoven's An die ferne Geliebte and Clara Wieck's Romance variée, Op. 3 in the Fantasie, and to Clara's Valses romantiques, Op. 4 in Davidsbündlertänze.

scholarly journals Reification, Matrices, and the Interrelationships of Goblin Spiders

Zootaxa ◽  
2013 ◽  
Vol 3608 (4) ◽  
pp. 278-280
Author(s):  
NORMAN I. PLATNICK
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
International Consortium ◽  
The Family ◽  
Paraphyletic Group ◽  
New Evidence ◽  
Scanning Electron

In a recent review of the interrelationships of goblin spiders (the family Oonopidae), Platnick et al. (2012) presented a new subfamily-level classification of the family, replacing older arrangements that included at least one paraphyletic group. That analysis was based heavily on new evidence obtained, by an international consortium of researchers, through scanning electron microscopy of the tarsal organs, tiny chemoreceptors found near the tips of the legs and pedipalps.

A comparative study of the functional morphology of parapodia and setae in nereids (Polychaeta: Nereididae)

2006 ◽  
Vol 56 (1) ◽  
pp. 103-120 ◽  
Author(s):  
◽  
Keyword(s):  
Specific Substrate ◽  
Morphological Parameters ◽  
Living Animal ◽  
Soft Or ◽  
Multiple Functions ◽  
Wide Range ◽  
The Family ◽  
Sem Study ◽  
Intertidal Habitats ◽  
Scanning Electron

AbstractErrant polychaetes of the family Nereididae can be found in a wide range of sub- and intertidal habitats. They can burrow, crawl and swim. The latter two behaviours are primarily achieved by the use of parapodia and their attached setae. Here we compare the parapodia and setae of five species of atoke nereids living in either soft or hard substrate in a scanning electron microscopy (SEM) study. Three types of setae, found in all the worms examined, were consistently different across species, allowing us to compare setal distribution. However, neither distribution nor number of setae, or intersetal gap showed a clear dependence on substrate. Thus it appears that the morphology is not adapted to a specific substrate. This might be because both the parapodia and the setae serve multiple functions in the living animal. Location of the parapodium and the size of the intersetal gap showed some dependence on whether the atoke stage swims. However, neither the area of the parapodium nor of the setal bundles seems to relate to swimming. Phylogenetic relationships amongst the examined species, from three genera all in the subfamily Nereidinae, did not significantly influence either of the morphological parameters investigated. This study indicates that the morphology of the parapodia and setae of nereids is not adapted to any specific function, instead they are presumably important for a variety of tasks performed by the worms.

Application of Scanning Electron Microscopy to Medical Research

1969 ◽  
Vol 27 ◽  
pp. 12-13
Author(s):  
J. D. Hutchison
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Medical Research ◽  
Prosthetic Heart Valve ◽  
School Of Medicine ◽  
Transmission Electron ◽  
Definition Of ◽  
Mechanism Of Failure ◽  
The Brain ◽  
Scanning Electron

When the transmission electron microscope was commercially introduced a few years ago, it was heralded as one of the most significant aids to medical research of the century. It continues to occupy that niche; however, the scanning electron microscope is gaining rapidly in relative importance as it fills the gap between conventional optical microscopy and transmission electron microscopy.IBM Boulder is conducting three major programs in cooperation with the Colorado School of Medicine. These are the study of the mechanism of failure of the prosthetic heart valve, the study of the ultrastructure of lung tissue, and the definition of the function of the cilia of the ventricular ependyma of the brain.

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