extinct


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extinct

(of an animal or plant species) having died out, no longer present in the world population.
References in classic literature ?
We here see at the bottom of the cliffs, beds containing sharks' teeth and sea-shells of extinct species, passing above into an indurated marl, and from that into the red clayey earth of the Pampas, with its calcareous concretions and the bones of terrestrial quadrupeds.
And as so many species, both living and extinct, of these same genera inhabit and have inhabited the Old World, it seems most probable that the North American elephants, mastodons, horse, and hollow- horned ruminants migrated, on land since submerged near Behring's Straits, from Siberia into North America, and thence, on land since submerged in the West Indies, into South America, where for a time they mingled with the forms characteristic of that southern continent, and have since become extinct.
This plain, would then be nothing but an immense cemetery, on which would repose the mortal remains of thousands of extinct generations.
He paused for a moment, and then, raising his voice, repeated slowly the words: "Which were extinct before the coming of man."
Whatever path the lecturer took amid the wilds of the past seemed invariably to lead him to some assertion as to extinct or prehistoric life which instantly brought the same bulls' bellow from the Professor.
But we may go further than this; for as new forms are continually and slowly being produced, unless we believe that the number of specific forms goes on perpetually and almost indefinitely increasing, numbers inevitably must become extinct. That the number of specific forms has not indefinitely increased, geology shows us plainly; and indeed we can see reason why they should not have thus increased, for the number of places in the polity of nature is not indefinitely great,--not that we have any means of knowing that any one region has as yet got its maximum of species.
From these several considerations I think it inevitably follows, that as new species in the course of time are formed through natural selection, others will become rarer and rarer, and finally extinct. The forms which stand in closest competition with those undergoing modification and improvement, will naturally suffer most.
Haringtonhippus would have lived at the same time as its cousins, the ancestors of modern Equus creatures, but did not breed with them, keeping their groups separate until it went extinct perhaps 17,000 years ago.
Washington, Mar 16 ( ANI ): Even though dinosaurs have been long extinct, bringing them back to life might be possible.
When the white-bellied heron is extinct I will still see as many as I do now, and I speak as someone familiar with white-bellied birds.
At least 110 species of harlequin frogs once lived in Central and South America, but two-thirds of them went extinct in the past 2 decades.
And between 15pcand 37pc of species could eventually become extinct including Wales's red kite, the research found.