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''Aspidosaurus'' is an extinct genus of dissorophoid temnospondyl within the family Dissorophidae. Like other dissorophids, ''Aspidosaurus'' species had a single row of plates formed by expansions of the neural spines.〔(A Description of ''Aspidosaurus novomexicanus'' Williston ) Permo-Carboniferous Vertebrates from New Mexico, p7-11. Retrieved 2011-09-11.〕 In 1911, Paul Miller discovered the remains of various dissorophid bones in New Mexico that were attributed to a new species, ''Aspidosaurus novomexicanus''. The skull closely resembled that of a specimen of ''Cacops aspidephorus'' found in Texas but the arrangement of ridges in the otic region was different. The teeth found were slender and conical and all of an approximately equal size. The vertebral column, pelvis and limb bones were also similar but the new specimen was distinguished from ''Cacops'' by the armour, the single row of vertical plates that were originally attached to the neural spines of the vertebrae.〔 ''A. novomexicanus'' was later attributed to the genus ''Broiliellus''. More recently, ''"A." novomexicanus'' has been removed from ''Broiliellus'' and classified as a closer relative of ''Cacops''. The original specimen is now housed in the University of California Museum of Paleontology and is referred to as the "Rio Arriba taxon" because of its uncertain phylogenetic placement. ==Phylogeny== Below is a cladogram from Schoch (2012) in which valid ''Aspidosaurus'' species are found to be basal dissorophids and ''"Aspidosaurus" novomexicanus'' -the Rio Arriba taxon- nests within the subfamily Cacopinae:〔 }} |label2=Dissorophidae |2= }} }} }} }} }} }} }} }} 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aspidosaurus」の詳細全文を読む スポンサード リンク
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