On subfamily structure of the Cupedidae (Coleoptera, Archostemata): data from paleontology and an approach to solving conflicting classifications

2021 ◽  
Vol 4 (4) ◽  
Author(s):  
ALEXANDER G. KIREJTSHUK
Keyword(s):  
Phylogenetic Reconstruction ◽  
The Other ◽  
Ernst Haeckel ◽  
Molecular Method ◽  
Full Extent ◽  
The Past ◽  
Molecular Approaches ◽  
The Family ◽  
Systematic Structure ◽  
Research Period

This paper demonstrates some of main differences between the systematic constructions based mostly on paleontological research and constructions involving the other approaches. Some reasons for these differences are discussed, together with an approach to solve contradictions between the conflicting hypotheses. The multiple (multidimensional) parallelism gives a possibility to solve many problems of phylogenetic interrelations due to reconstructions based on coincidence of patterns of changes (series of interconnected facts) traced in different aspects of evolutionary processes. This principle originates in the ideas by Jean Agassiz and Ernst Haeckel defined as the principle of triple parallelism. Other aspects of the evolution can be added to the morphology, embryology, and paleontology, initially included in this method. The molecular method is one of such aspects. It is shown that the potential resolution of the morphological and molecular approaches in some cases could be rather restricted, particularly applying ancient groups with main evolutionary transformations passed far in the past. The infraorder Cupediformia and suborder Archostemata in general are examples of such cases. It is advisable in the current research period that has followed the previous interpretation of the systematic structure of the family Cupedidae recognizing three subfamilies with not quite distinct hiatus between them (Cupedinae, Ommatinae and Triadocupedinae). Some recent morphological and molecular approaches proposed to divide the Cupedidae into two separate families on the basis of incomplete information accessible after study of only modern representatives, as most events in the family evolution occurred during the Palaeozoic and Mesozoic, and these events are scarcely possible to trace without considering fossils. As the principle of multiple parallelism cannot be currently used for archostematans to the full extent of its power, it is necessary to choose the paleontological method of phylogenetic reconstruction as crucial. This approach is preferable for groups that are well-documented through very diverse fossils, and for which only few of its remnants of the past diversity reached the modern epoque.

scholarly journals Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Deborah Wall-Palmer ◽  
Arie W. Janssen ◽  
Erica Goetze ◽  
Le Qin Choo ◽  
Lisette Mekkes ◽  
...  
Keyword(s):  
Fossil Record ◽  
Large Scale ◽  
Global Scale ◽  
The Other ◽  
The Past ◽  
The Family ◽  
Rapid Diversification ◽  
Maximum Likelihood Phylogeny ◽  
Extinction Events ◽  
Ribosomal Rrna

Abstract Background The aragonite shelled, planktonic gastropod family Atlantidae (shelled heteropods) is likely to be one of the first groups to be impacted by imminent ocean changes, including ocean warming and ocean acidification. With a fossil record spanning at least 100 Ma, atlantids have experienced and survived global-scale ocean changes and extinction events in the past. However, the diversification patterns and tempo of evolution in this family are largely unknown. Results Based on a concatenated maximum likelihood phylogeny of three genes (cytochrome c oxidase subunit 1 mitochondrial DNA, 28S and 18S ribosomal rRNA) we show that the three extant genera of the family Atlantidae, Atlanta, Protatlanta and Oxygyrus, form monophyletic groups. The genus Atlanta is split into two groups, one exhibiting smaller, well ornamented shells, and the other having larger, less ornamented shells. The fossil record, in combination with a fossil-calibrated phylogeny, suggests that large scale atlantid extinction was accompanied by considerable and rapid diversification over the last 25 Ma, potentially driven by vicariance events. Conclusions Now confronted with a rapidly changing modern ocean, the ability of atlantids to survive past global change crises gives some optimism that they may be able to persist through the Anthropocene.

scholarly journals Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

2020 ◽  
Author(s):  
Deborah Wall-Palmer ◽  
Arie W Janssen ◽  
Erica Goetze ◽  
Le Qin Choo ◽  
Lisette Mekkes ◽  
...  
Keyword(s):  
Fossil Record ◽  
Large Scale ◽  
Global Scale ◽  
The Other ◽  
The Past ◽  
The Family ◽  
Rapid Diversification ◽  
Maximum Likelihood Phylogeny ◽  
Extinction Events ◽  
Ribosomal Rrna

Abstract Background: The aragonite shelled, planktonic gastropod family Atlantidae (shelled heteropods) is likely to be one of the first groups to be impacted by imminent ocean changes, including ocean warming and ocean acidification. With a fossil record spanning at least 100 Million years (Ma), atlantids have experienced and survived global-scale ocean changes and extinction events in the past. However, the diversification patterns and tempo of evolution in this family are largely unknown. Results: Based on a concatenated maximum likelihood phylogeny of three genes (cytochrome c oxidase subunit 1 mitochondrial DNA, 28S and 18S ribosomal rRNA) we show that the three extant genera of the family Atlantidae, Atlanta, Protatlanta and Oxygyrus, form monophyletic groups. The genus Atlanta is split into two groups, one exhibiting smaller, well ornamented shells, and the other having larger, less ornamented shells. The fossil record, in combination with a fossil-calibrated phylogeny, suggests that large scale atlantid extinction was accompanied by considerable and rapid diversification over the last 25 Ma, potentially driven by vicariance events. Conclusions: Now confronted with a rapidly changing modern ocean, the ability of atlantids to survive past global change crises gives some optimism that they may be able to persist through the Anthropocene.

scholarly journals The wife as stranger in the family

2019 ◽  
Vol 75 (3) ◽  
Author(s):  
Susara J. Nortjé-Meyer
Keyword(s):  
Feminist Theory ◽  
Spatial Relations ◽  
Specific Form ◽  
Human Relation ◽  
The Other ◽  
Human Relations ◽  
The Past ◽  
The Family ◽  
The One ◽  
The Stranger

The phenomenon of the stranger reveals that spatial relations are, on the one hand, only the condition and, on the other hand, the symbol of human relations. This article discusses the specific form of interaction of the wife (woman) as a stranger in the context of the biblical family. The wife as a stranger is discussed here not in the sense often touched upon in the past, as a wanderer who comes today and goes tomorrow, but rather as a person who comes today and stays tomorrow. She is, so to speak, the potential wanderer: although she has not moved on, she has also not overcome the freedom of coming and going. She is fixed within a particular spatial group, or within a group whose boundaries are similar to spatial boundaries, but her position in this group is determined by the fact that she never belonged to it from the beginning. The unity of nearness and remoteness involved in every human relation is organised, in the phenomenon of the stranger, in a way which may be most briefly formulated by saying that in her relationships, distance means that she, who is close by, is also far away, and her strangeness means that she, who is far away, is also actually near. I examined the implications of knowing and identifying the wife as a stranger for feminist theory and its interpretation.

scholarly journals A review of the family Sphaeronectidae (Class Hydrozoa, Order Siphonophora), with the description of three new species

Zootaxa ◽  
2009 ◽  
Vol 2147 (1) ◽  
pp. 1-48 ◽  
Author(s):  
P. R. PUGH
Keyword(s):  
New Species ◽  
Systematic Position ◽  
The Other ◽  
The Past ◽  
The Family ◽  
The Status ◽  
Molecular Phylogenetic ◽  
Single Genus ◽  
Three New Species ◽  
Molecular Phylogenetic Data

The last reviewer of the family Sphaeronectidae (Siphonophora, Calycophorae) (Carré, 1968c) considered that it consisted of a single genus, Sphaeronectes, containing five species; three of which had been recently described by himself. For the other two species there had been much nomenclatural confusion in the past, as is herein reviewed. It is considered that for one of these species the name Sphaeronectes koellikeri Huxley (1859) has priority over the name currently in usage, that is S. gracilis (Claus, 1873; 1874). In addition the status of S. brevitruncata (Chun, 1888) is reconsidered and the species considered valid, with S. japonica (Stepanjants, 1967) being considered as a likely junior synonym of it. Three new Sphaeronectes species, S. christiansonae sp. nov., S. haddocki sp. nov. and S. tiburonae sp. nov., are described, and the systematic position of the genus reconsidered in the light of preliminary molecular phylogenetic data.

Phylogenetic Reconstruction of Character Development in Physciaceae

2001 ◽  
Vol 33 (1) ◽  
pp. 3-23 ◽  
Author(s):  
A. Nordin ◽  
J.-E. Mattsson
Keyword(s):  
Phylogenetic Trees ◽  
Character Development ◽  
Phylogenetic Reconstruction ◽  
Cladistic Analysis ◽  
The Other ◽  
New Genera ◽  
Secondary Chemistry ◽  
The Family ◽  
History Of ◽  
Basal Position

AbstractA cladistic analysis of the Physciaceae, based on morphological and chemical data, is presented. In the resulting phylogenetic reconstruction two major clades are formed, one containing the foliose genera (Anaptychia, Dirinana, Heterodermia, Hyperphyscia, Physcia, Phaeophyscia, Physconia, Pyxine) and the fruticose Tornabea and the other containing the remaining, mainly crustose genera. Rinodina appears as paraphyletic with representatives both at the base of the tree, at the same level as the two major clades and at the base of the crustose clade. Also Mobergia has a basal position. The characters used and their distribution in the phylogenetic trees are discussed as well as their significance for the identification of monophyletic groups. The history of the family is also briefly hinted at and characters of importance for the recognition of new genera are surveyed. Relevant publications and the variation in secondary chemistry are presented in tables.

scholarly journals Fossil-calibrated molecular phylogeny of atlantid heteropods (Gastropoda, Pterotracheoidea)

2020 ◽  
Author(s):  
Deborah Wall-Palmer ◽  
Arie W Janssen ◽  
Erica Goetze ◽  
Le Qin Choo ◽  
Lisette Mekkes ◽  
...  
Keyword(s):  
Fossil Record ◽  
Large Scale ◽  
Global Scale ◽  
The Other ◽  
The Past ◽  
The Family ◽  
Rapid Diversification ◽  
Maximum Likelihood Phylogeny ◽  
Extinction Events ◽  
Ribosomal Rrna

Abstract The aragonite shelled, planktonic gastropod family Atlantidae (shelled heteropods) is likely to be one of the first groups to be impacted by imminent ocean changes, including ocean warming and ocean acidification. With a fossil record spanning at least 100 Million years (Ma), atlantids have experienced and survived global-scale ocean changes and extinction events in the past. However, the diversification patterns and tempo of evolution in this family are largely unknown. Based on a concatenated maximum likelihood phylogeny of three genes (cytochrome c oxidase subunit 1 mitochondrial DNA, 28S and 18S ribosomal rRNA) we show that the three extant genera of the family Atlantidae, Atlanta, Protatlanta and Oxygyrus, form monophyletic clades. The genus Atlanta is split into two groups, one exhibiting smaller, well ornamented shells, and the other having larger, less ornamented shells. The fossil record, in combination with a fossil-calibrated phylogeny suggest that large scale atlantid extinction was accompanied by considerable and rapid diversification over the last 25 Ma, potentially driven by vicariance events. Now confronted with a rapidly changing modern ocean, the ability of atlantids to survive past global change crises gives some optimism that they may be able to persist through the Anthropocene.

Group-Analytic Family Psychotherapy: A Transcultural Perspective

1997 ◽  
Vol 30 (3) ◽  
pp. 349-359
Author(s):  
Corrado Pontalti ◽  
Raffaele Menarini
Keyword(s):  
Cultural History ◽  
The Other ◽  
Analytic Family ◽  
Global Village ◽  
Theoretical Concepts ◽  
The Past ◽  
The Family ◽  
Borderline Patients ◽  
History Of ◽  
Family Psychopathology

Group-analytic family psychotherapy is a methodology based on a development of Group-analytic theory. The family is defined as a mental field formed by the symbolic plot of `us' in a double relationship: with the cultural history of the family group on one side, and with external groups on the other. The symbolic plot thus has a tribal characteristic which connects the genealogical trees to the ancestral foundation of the group. In cases of psychotic and borderline patients, Group-analytic family psychotherapy has indicated two types of family: those that are embedded in the past, or families that are cut off from the past. After outlining the circumstances of Italian families, this article presents two clinical cases which exemplify the theoretical concepts previously set forth. The final thesis of the article relates the current international situation to such family psychopathology: the global village contrasted with a planet fragmented into ethnic groups.

The shadow of the bear

2020 ◽  
Vol 136 (3) ◽  
pp. 658-682
Author(s):  
Nicola Morato
Keyword(s):  
The Other ◽  
The Core ◽  
The Past ◽  
New Approaches ◽  
The Family ◽  
Literary Origins

AbstractNew approaches built over the past ten years make it possible to address several long-standing questions regarding Guiron le Courtois. In particular, these studies illuminate ambiguities related to the literary origins of the protagonist and of his family. Guiron’s lineage as well as that of Galeholt le Brun, his mentor, include powerful individuals; and yet these strong characters remain peripheral, seldom crossing into the orbit of the Arthurian court. Of their lives only certain segments are known, and these alternate with imprisonment and incognito chivalric adventures. The Roman de Guiron, the core narrative of the cycle, most likely drew the protagonist’s name from the tradition of Arthurian lais but reinvented from scratch his chivalric biography, playing on the ambiguity of the relations between Guiron’s family and the Bruns, the family of Galeholt. One mirrors the other, and both seem to converge towards the archaic figures of the giant and the bear, while the plot unfolds in an unusual retro-chronology, drawing the reader’s sight to their origins.

Immunoferritin localization of intracellular antigens in positively stained frozen sections

1978 ◽  
Vol 36 (2) ◽  
pp. 168-169
Author(s):  
K. T. Tokuyasu
Keyword(s):  
Surface Tension ◽  
Water Surface ◽  
Thin Layers ◽  
The Other ◽  
Positive Staining ◽  
Frozen Sections ◽  
The Past ◽  
Ultrathin Frozen Sections ◽  
Definition Of

During the past investigations of immunoferritin localization of intracellular antigens in ultrathin frozen sections, we found that the degree of negative staining required to delineate u1trastructural details was often too dense for the recognition of ferritin particles. The quality of positive staining of ultrathin frozen sections, on the other hand, has generally been far inferior to that attainable in conventional plastic embedded sections, particularly in the definition of membranes. As we discussed before, a main cause of this difficulty seemed to be the vulnerability of frozen sections to the damaging effects of air-water surface tension at the time of drying of the sections.Indeed, we found that the quality of positive staining is greatly improved when positively stained frozen sections are protected against the effects of surface tension by embedding them in thin layers of mechanically stable materials at the time of drying (unpublished).

Applications of Through-Focus Dark Field Image Shifts to Phase Identification

1975 ◽  
Vol 33 ◽  
pp. 178-179
Author(s):  
Prakash Rao
Keyword(s):  
Dark Field Image ◽  
Thin Foil ◽  
Dark Field ◽  
The Other ◽  
Stereo Image ◽  
Phase Identification ◽  
The Past ◽  
Field Electron Microscopy ◽  
Dark Field Electron ◽  
Recent Extension

Image shifts in out-of-focus dark field images have been used in the past to determine, for example, epitaxial relationships in thin films. A recent extension of the use of dark field image shifts has been to out-of-focus images in conjunction with stereoviewing to produce an artificial stereo image effect. The technique, called through-focus dark field electron microscopy or 2-1/2D microscopy, basically involves obtaining two beam-tilted dark field images such that one is slightly over-focus and the other slightly under-focus, followed by examination of the two images through a conventional stereoviewer. The elevation differences so produced are usually unrelated to object positions in the thin foil and no specimen tilting is required.In order to produce this artificial stereo effect for the purpose of phase separation and identification, it is first necessary to select a region of the diffraction pattern containing more than just one discrete spot, with the objective aperture.

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