Arthropod Terrestriality

1990 ◽  
Vol 3 ◽  
pp. 214-256 ◽  
Author(s):  
Conrad C. Labandeira ◽  
Bret S. Beall

Since the late Paleozoic, insects and arachnids have diversified in the terrestrial world so spectacularly that they have become unquestionably the most diverse group of organisms to ever inhabit the planet. In fact, this 300 million year interval may appropriately be referred to as the age of arthropods. What is the origin and history of terrestrial arthropods? How is arthropod diversity maintained on land? In this rhetorical context we will discuss (1) the degree to which terrestriality is found in arthropods, (2) the physiological barriers to terrestrialization that arthropod clades confronted, (3) the historical record of arthropod diversity on land based on paleobiological, comparative physiological and zoogeographical evidence, and (4) some tentative answers to the “why” of terrestrial arthropod success. We are providing a geochronologic scope to terrestriality that includes not only the early history of terrestrial arthropods, but also the subsequent expansion of arthropods into major terrestrial habitats.

2013 ◽  
Vol 10 (1) ◽  
pp. 165-173
Author(s):  
Brian Imhoff

Abstract Historians of the U.S. Southwest invariably rely on English-language translations of original Spanish documents for their interpretive work. However, a philological approach to the Spanish documents reveals all manner of translator shortcomings, some of which negatively impact the historical record. I document one such instance pertaining to the early history of Texas and argue that the failure to adhere to sound philological practice has produced an inaccurate historical canon. Data are taken from a Spanish expedition diary from the late 17th-century and from unpublished archival sources pertaining to it.


Author(s):  
Michael Peneder ◽  
Andreas Resch

Part I provides a synopsis of the ongoing stream of innovation in monetary and financial history, as well as the scholarly struggle to understand and assimilate it in the history of monetary thought. It serves as an introduction to the non-specialist, providing the general historical background. In the first of three chapters, the focus is on the early origins of money as a social institution. It is of significance to the later discussion of Schumpeter’s monetary theory for two reasons: first, the historical account illustrates the perpetual stream of new monetary arrangements and their importance to the real economy; second, the modern historical record puts into perspective the traditional preoccupation with metallism and the coinage of money as a means of exchange, which dominated the monetary orthodoxy at Schumpeter’s time. In other words, the early history of money highlights the modernity of Schumpeter’s later vision.


Classics ◽  
2020 ◽  
Author(s):  
Christopher Smith

The Romans developed an account of their early history which was organized by the reigns of seven kings. By the 1st century bce, they had settled on a standard chronology for these kings, and in the following sequence: Romulus 753–717, Numa Pompilius 716–674, Tullus Hostilius 673–642, Ancus Marcius 641–617, Tarquinius Priscus 616–578, Servius Tullius 578–534, Tarquinius Superbus 534–509. It is clear from archaeological evidence that Rome from the 8th to the 6th century bce was in a period of significant growth and transformation. There are a number of exciting finds which have been related to the historical account. This account however was the product of a long period of development, and the narrative as it developed came to reflect the contemporary concerns of Roman politics. So research on Roman kingship has to take account of both the possibility of genuine history underlying the account, and the literary and artistic motivations which led to the transformations of the story over time. The relationship between these two is the subject of significant methodological discussion, on a spectrum from attempts to directly relate the historical account to archaeological finds, to significantly more skeptical claims that connections are coincidental and that the historical record is wholly unreliable. The third strand of investigation is institutional history and includes the controversy over the so-called leges regiae, the alleged legal precursors to the codification of law in the Twelve Tables from the mid-5th century bce, and the transformation of the Roman constitution into one characterized by shared time-limited office-holding. A quite different approach sees the kings as encoding deep mythological structures, and argues for a reconceptualization of the early history of Rome as a mythical rather than a historical sequence. Although this has been less popular recently, aspects of this scholarly approach have been influential in other fields of study. This is particularly true of social anthropology and the history of religion, where Dumézil’s classification of the Roman kings has been influential but controversial (see section Roman Kings and Indo-European Mythology).


Author(s):  
Robert M. Fisher

By 1940, a half dozen or so commercial or home-built transmission electron microscopes were in use for studies of the ultrastructure of matter. These operated at 30-60 kV and most pioneering microscopists were preoccupied with their search for electron transparent substrates to support dispersions of particulates or bacteria for TEM examination and did not contemplate studies of bulk materials. Metallurgist H. Mahl and other physical scientists, accustomed to examining etched, deformed or machined specimens by reflected light in the optical microscope, were also highly motivated to capitalize on the superior resolution of the electron microscope. Mahl originated several methods of preparing thin oxide or lacquer impressions of surfaces that were transparent in his 50 kV TEM. The utility of replication was recognized immediately and many variations on the theme, including two-step negative-positive replicas, soon appeared. Intense development of replica techniques slowed after 1955 but important advances still occur. The availability of 100 kV instruments, advent of thin film methods for metals and ceramics and microtoming of thin sections for biological specimens largely eliminated any need to resort to replicas.


1979 ◽  
Vol 115 (11) ◽  
pp. 1317-1319 ◽  
Author(s):  
J. E. Morgan

2015 ◽  
Author(s):  
Alexander Henry ◽  
David Thompson
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