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Auchenaspis
''Auchenaspis salteri'' is an extinct species of armored jawless fish of the order Thyestiida from the Late Silurian of England.〔http://www.paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=34114&is_real_user=0〕〔Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology 364: p.560. http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class. Retrieved 2007-12-20.〕〔http://flatpebble.nceas.ucsb.edu/cgi-bin/bridge.pl?action=displayTaxonomicNamesAndOpinions&reference_no=6930&display=opinions〕 In England, ''A. salteri'''s fossils are found in extreme abundance in the Lower Old Red Sandstone strata in Ledbury, Herefordshire.
''A. salteri'' strongly resembles the thyestiids ''Procephalaspis'' and ''Thyestes'', and within Thyestiida, it represents a transitional form between the primitive, superficially ''Cephalaspis''-like forms, such as ''Thyestes'', and the more specialized tremataspid thyestiids, like ''Tremataspis'', ''Dartmuthia'', or ''Dobraspis'', whose headshields tend to resemble hot buns or horseshoe crabs.
==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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