Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various amniote vertebrates that emerged in the Permian Period and diversified in the Triassic, including the mammals, their ancestors, and their relatives.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun biology Any
extinct reptile of the order Therapsida; thought to be directancestors of themammals
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun probably warm-blooded; considered direct ancestor of mammals
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Descended from creatures called therapsid reptiles, bats first took flight in the Triassic period more than two hundred million years ago.
Going Mutant Dr. Barry Leed 2010
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My first therapsid drawings were downright atrocious.
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His book “From the Beginning” was also a surprisingly detailed introduction to extinct fish, reptile, and therapsid art.
Archive 2009-10-01 Weapon of Mass Imagination 2009
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His book “From the Beginning” was also a surprisingly detailed introduction to extinct fish, reptile, and therapsid art.
Life's Time Capsule: Member Bio: Nima Sassani Weapon of Mass Imagination 2009
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As Romer puts it, “We arbitrarily group the therapsids as reptiles we have to draw a line somewhere but were they alive, a typical therapsid probably would seem to us an odd cross between a lizard and a dog, a transitional type between the two great groups of backboned animals.”
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Because the fossil evidence of the transition from therapsid to mammal is extensive, detailed and well-studied, it is not surprising that most creationists make no mention of it.
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“We arbitrarily group the therapsids as reptiles we have to draw a line somewhere but were they alive, a typical therapsid probably would seem to us an odd cross between a lizard and a dog, a transitional type between the two great groups of backboned animals.”
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The entire series of therapsid transitionals are each fully functional, completely capable of chewing their food and detecting airborne sounds just as modern snakes eat with a double jaw joint and detect sounds through bones connected to their skull and jawbones.
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“We arbitrarily group the therapsids as reptiles we have to draw a line somewhere but were they alive, a typical therapsid probably would seem to us an odd cross between a lizard and a dog, a transitional type between the two great groups of backboned animals.”
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Gish makes one final effort to discredit the therapsid-mammal links: Many of the diagnostic features of mammals, of course, reside in their soft anatomy or physiology.
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