Genera Quotes

Established species are evolving so slowly that major transitions between genera and higher taxa must be occurring within small rapidly evolving populations that leave NO LEGIBLE FOSSIL RECORD. ~ Steven M. Stanley

The names of the plants ought to be stable [certa], consequently they should be given to stable genera. ~ Carl Linnaeus

At the time of the Cognitive Revolution, the planet was home to about 200 genera of large terrestrial mammals weighing over 100 pounds. At the time of the Agricultural Revolution, only about a hundred remained. Homo sapiens drove to extinction about half of the planet's big beasts long before humans invented the wheel, writing, or iron tools. ~ Yuval Noah Harari

The idea that one can go to the fossil record and expect to empirically recover an ancestor-descendant sequence, be it of species, genera, families, or whatever, has been, and continues to be, a pernicious illusion. ~ Gareth J. Nelson

Anglers may be divided into almost as many genera and species as the fish they catch, and engage in the sport from as many impulses. ~ Thaddeus Norris

Let us suppose that we have laid on the table ... [a] piece of glass ... and let us homologize this glass to a whole order of plants or birds. Let us hit this glass a blow in such a manner as but to crack it up. The sectors circumscribed by cracks following the first blow may here be understood to represent families. Continuing, we may crack the glass into genera, species and subspecies to the point of finally having the upper right hand corner a piece about 4 inches square representing a sub-species. ~ Leon Croizat

The Americas were a great laboratory of evolutionary experimentation, a place where animals and plants unknown in Africa and Asia had evolved and thrived. But no longer. Within 2,000 years of the Sapiens' arrival, most of these unique species were gone. According to current estimates, within that short interval, North America lost thirty-four out of its forty-seven genera of large mammals. South America lost fifty out of sixty. The sabre-tooth cats, after flourishing for more than 30 million years, disappeared, and so did the giant ground sloths, the oversized lions, native American horses, native American camels, the giant rodents and the mammoths. Thousands of species of smaller mammals, reptiles, birds and even insects and parasites also became extinct (when the mammoths died out, all species of mammoth ticks followed them to oblivion). ~ Yuval Noah Harari

People began to understand that with the acquisition of California the nation had obtained practically half a continent, of which the future possibilities were almost unlimited, so far as the development of natural resources and the genera production of wealth were concerned. ~ John Moody

The air of caricature never fails to show itself in the products of reason applied relentlessly and without correction. The observation of clinical facts would seem to be a pursuit of the physician as harmless as it is indispensable. [But] it seemed irresistibly rational to certain minds that diseases should be as fully classifiable as are beetles and butterflies. This doctrine ... bore perhaps its richest fruit in the hands of Boissier de Sauvauges. In his Nosologia Methodica published in 1768 ... this Linnaeus of the bedside grouped diseases into ten classes, 295 genera, and 2400 species. ~ Wilfred Trotter

Every paleontologist knows that most new species, genera, and families, and that nearly all categories above the level of family appear in the record suddenly and are not led up to by known, gradual, completely continuous transitional sequences. ~ George Gaylord Simpson

Is it philosophical, is it quite allowable, to assume without evidence from fossil plants that the family or any of the genera was once larger and wide spread? and occupied a continuous area? ~ Asa Gray

Universitas in modo citharae sit disposita, in qua diversa genera in modo chordarum sit consonantia. The universe is arranged like a cithera, in which different kinds of things sound together harmoniously, just as they do in a chord. ~ Honorius Augustodunensis

The close relationship between railroad expansion and the genera development and prosperity of the country is nowhere brought more distinctly into relief than in connection with the construction of the Pacific railroads. ~ John Moody

As the species of the same genus usually have, though by no means invariably, much similarity in habits and constitution, and always in structure, the struggle will generally be more severe between them, if they come into competition with each other, than between the species of distinct genera. ~ Charles Darwin

The chemical differences among various species and genera of animals and plants are certainly as significant for the history of their origins as the differences in form. If we could define clearly the differences in molecular constitution and functions of different kinds of organisms, there would be possible a more illuminating and deeper understanding of question of the evolutionary reactions of organisms than could ever be expected from morphological considerations. ~ Ray Lankester

If about a dozen genera of birds had become extinct or were unknown, who would have ventured to have surmised that birds might have existed which used their wings solely as flappers, like the logger-headed duck (Micropterus of Eyton); as fins in the water and front legs on the land, like the penguin; as sails, like the ostrich; and functionally for no purpose, like the Apteryx. Yet the structure of each of these birds is good for it, under the conditions of life to which it is exposed, for each has to live by a struggle; but it is not necessarily the best possible under all possible conditions. It must not be inferred from these remarks that any of the grades of wing-structure here alluded to, which perhaps may all have resulted from disuse, indicate the natural steps by which birds have acquired their perfect power of flight; but they serve, at least, to show what diversified means of transition are possible. ~ Charles Darwin

... But that those belonging to what are called the same genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of any one species are the descendants of that species. ~ Charles Darwin

Branches or types are characterized by the plan of their structure,
Classes, by the manner in which that plan is executed, as far as ways and means are concerned,
Orders, by the degrees of complication of that structure,
Families, by their form, as far as determined by structure,
Genera, by the details of the execution in special parts, and
Species, by the relations of individuals to one another and to the world in which they live, as well as by the proportions of their parts, their ornamentation, etc. ~ Louis Agassiz

The fact is that libertarianism is not and does not pretend to be a complete moral or aesthetic theory; it is only a political theory, that is, the important subset of moral theory that deals with the proper role of violence in social life.

Political theory deals with what is proper or improper for government to do, and government is distinguished from every other group in society as being the institution of organized violence. Libertarianism holds that the only proper role of violence is to defend person and property against violence, that any use of violence that goes beyond such just defense is itself aggressive, unjust, and criminal. Libertarianism, therefore, is a theory which states that everyone should be free of violent invasion, should be free to do as he sees fit, except invade the person or property of another. What a person does with his or her life is vital and important, but is simply irrelevant to libertarianism.

It should not be surprising, therefore, that there are libertarians who are indeed hedonists and devotees of alternative lifestyles, and that there are also libertarians who are firm adherents of "bourgeois" conventional or religious morality. There are libertarian libertines and there are libertarians who cleave firmly to the disciplines of natural or religious law. There are other libertarians who have no moral theory at all apart from the imperative of non-violation of rights. That is because libertarianism per se has no genera ~ Murray N. Rothbard

About thirty-five genera of mammals disappear from America, about half of them in a brief window of 500 years, 13,200 to 12,700 years ago, with Clovis hunters occupying the core of that time period. A sudden cooling, the Younger Dryas, descends on the Earth by 12,880 years ago, marking the terminal appearance of many of these animals. Suspected causes of the YD are still contentious. But it signals the end of Clovis and much of the megafauna. ~ Doug Peacock

The book was sandwiched firmly between Analytic Keys to the Genera and Species of North American Mosses, and the Complete English-Russian Dictionary by A. Alexandrow, which had me actually speculating on just what terrible crimes I might have committed against love and peace in a former life to have earned myself this one. ~ Melissa Jensen