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・ Petar Grbić
・ Petar Grgec
・ Petar Gudev
・ Petar Hadzi Boskov
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・ Petaloconchus erectus
・ Petaloconchus floridanus
・ Petaloconchus glomeratus
・ Petaloconchus interliratus
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Petalodontiformes
・ Petalodus
・ Petalomyrmex
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・ Petalonema alatum
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・ Petalonyx linearis
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・ Petalonyx thurberi
・ Petalophthalmidae
・ Petalophyllaceae
・ Petalophyllum ralfsii
・ Petalopoma
・ Petalopoma elisabettae
・ Petalopteryx


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Petalodontiformes : ウィキペディア英語版
Petalodontiformes

Petalodontiformes ("thin-plate teeth") is an extinct order of marine cartilaginous fish related to modern day chimaera found in what is now the United States of America and Europe. With a very few exceptions, they are known entirely from teeth. All fossils range from the Carboniferous to the Permian, where they are presumed to have died out during the Permian/Triassic extinction event.
The two best known species are ''Belantsea montana'', of Carboniferous Bear Gulch, Montana, and ''Janassa bituminosa'', of Permian Europe, as whole fossil specimens have been found of these two.
== References ==



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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