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Ampyx (trilobite) : ウィキペディア英語版 | Ampyx (trilobite)
''Ampyx'' (meaning ''hairband'') is a Ordovician-Silurian genus of Asaphid trilobites of the family Raphiophoridae. Species of ''Ampyx'' are characterized by three extended spines on the head-shield, one spine derived from each free cheek, and one spine emanating from the glabella.〔H H Swinnerton - ''Outlines of Palaentology'', Edward Arnold (Publishers) Ltd, 1972. ISBN 0-7131-2357-5.〕 Species include ''Ampyx linleyensis'' (Lanvirn-Caradoc series).〔''British Palaeozoic Fossils'' - Natural History Museum 4th edition 1975. Plate 8. ISBN 0-565-05624-7.〕 Species of ''Ampyx'' grew to an average length of 1.5 inches (4 centimeters). == References ==
* Parker, Steve. Dinosaurus: the complete guide to dinosaurs. Firefly Books Inc, 2003. Pg. 48
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