Evolution of the Vertebrates: A History of the Backboned Animals Through Time |
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Page 232
... canine , and nine postcanine teeth . In the mammal - like reptiles the postcanine teeth , commonly designated as cheek teeth , either were all alike or formed a series that gradually increased in complexity from front to back . In the ...
... canine , and nine postcanine teeth . In the mammal - like reptiles the postcanine teeth , commonly designated as cheek teeth , either were all alike or formed a series that gradually increased in complexity from front to back . In the ...
Page 325
... canine teeth became relatively smaller than they had been in Dinictis ; but otherwise the dentition changed very little . As the saber - tooth cats evolved , the canine teeth remained large , as they had been in Hoplophoneus . Such ...
... canine teeth became relatively smaller than they had been in Dinictis ; but otherwise the dentition changed very little . As the saber - tooth cats evolved , the canine teeth remained large , as they had been in Hoplophoneus . Such ...
Page 334
... canine teeth , which seems strange in a plant - eating mammal , but nevertheless was not uncommon in some of the ... canine tooth on either side . The front of the lower jaw was deeply flanged , making a protection for the canine saber ...
... canine teeth , which seems strange in a plant - eating mammal , but nevertheless was not uncommon in some of the ... canine tooth on either side . The front of the lower jaw was deeply flanged , making a protection for the canine saber ...
Contents
INTRODUCTION | 1 |
JAWLESS VERTEBRATES | 11 |
SUCCESS OF THE FISHES | 42 |
Copyright | |
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adaptive radiation Africa amphibians ancestors animals armor arthrodires artiodactyls birds body bones bony fishes brain canine carnivores Cenozoic cheek teeth comparatively continued creodonts Cretaceous Cretaceous period crocodilians crossopterygians cusps Devonian dinosaurs dorsal early elongated Eocene epoch evolution evolutionary development evolutionary history evolved faunas feet fossil record front genera genus geologic giant gill head shield heavy hind hoofed mammals horns horses ichthyosaurs ichthyostegids incisors indicate insectivores Jurassic known labyrinthodonts land land-living vertebrates late limbs litopterns lived lower jaw lungfishes mammal-like mammalian mammals marine marsupials mastodonts Mesozoic middle Miocene modern North America notoungulates numerous Oligocene Order ostracoderms paired fins Paleocene Paleozoic pelvis perissodactyls Permian placentals placoderms Pleistocene Pliocene premolars primitive probably proboscideans region reptiles rhinoceroses rodents sediments sharks Silurian skeleton skull South specialized strong Suborder Superfamily tail teleosts temporal opening Tertiary tetrapods therapsids titanotheres toes tooth trend Triassic Triassic period ungulates upper vertebrates whales