pteraspis is an extinct genus of jawless fish that lived in the devonian period. - 古生代 幅插畫檔、美工圖案、卡通及圖標
a herd of plateosaurus dinosaurs watch a hunting pack of carnivorous coelophysis - 古生代 幅插畫檔、美工圖案、卡通及圖標
skeletal morphology and microscopic surface architecture of ceriopora hamiltonensis - 古生代 幅插畫檔、美工圖案、卡通及圖標
a group of xenacanthus prehistoric sharks from the devonian and triassic periods of earth's history. - 古生代 幅插畫檔、美工圖案、卡通及圖標
trilobite was an extinct marine arthropod, a hugely successful group of sea creatures that lived for nearly 300 million years during the paleozoic era - 古生代 幅插畫檔、美工圖案、卡通及圖標
doryaspis is an extinct primitive jawless fish that fed on plankton in the devonian period of norway. - 古生代 幅插畫檔、美工圖案、卡通及圖標
keratocephalus was a semi-aquatic herbivore dinosaur that lived during the permian age in africa. - 古生代 幅插畫檔、美工圖案、卡通及圖標
terebratula is a modern genus of brachiopods with a fossil record dating back to the late devonian - 古生代 幅插畫檔、美工圖案、卡通及圖標
diverse univalve shell morphologies from upper silurian and lower helderberg formations - 古生代 幅插畫檔、美工圖案、卡通及圖標
anatomical structure and armored plating of pterichthys cornutus - dorsal view of an armored placoderm, a unique jawed fish from the devonian period - 古生代 幅插畫檔、美工圖案、卡通及圖標
morphological features and structural symmetry of trigonocarpon ovatum from the british coal-measures - 古生代 幅插畫檔、美工圖案、卡通及圖標種子, 草圖
evolutionary diversity of brachiopod shell morphologies from the carboniferous limestone - various brachiopod species - 古生代 幅插畫檔、美工圖案、卡通及圖標
