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Calymene
''Calymene'' (meaning ''beautiful crescent'' as a reference to the glabella) is a genus of trilobites in the order Phacopida that are found throughout North America, North Africa, and Europe in primarily Silurian outcrops.〔(【引用サイトリンク】work=The Paleontology Database )〕 ''Calymene'' is closely related to ''Flexicalymene'', and both genera are frequently found inrolled.
Calymene trilobites are small, typically 2cm in length. Their cephalon is the widest part of the animal, and the thorax is usually in 13 segments.
== Known species and locations ==
*†''Calymene breviceps'', Indiana and Illinois
*†''Calymene blumenbachii'', Dudley, England
*†''Calymene brevicapitata'', N. and S. Wales
*†''Calymene cambrensis'', Wales
*†''Calymene celebra'', Illinois, Indiana, and Wisconsin.〔(【引用サイトリンク】url=http://paleodb.org/cgi-bin/bridge.pl?a=basicTaxonInfo&taxon_no=189543 )〕
*†''Calymene clavicula'', Oklahoma
*†''Calymene daviesii'', Radnorshire, Wales
*†''Calymene duplicata'', Wales and Ireland
*†''Calymene hopkinsoni'', Wales
*†''Calymene niagarensis'', New York
*†''Calymene parvifrons'', Wales
*†''Calymene senaria'', N. Wales and Ireland
*†''Calymene tristani'', Cornwall, England
*†''Calymene tuberculata'', Gotland, Sweden
*†''Calymene vogdesi'', Ohio
*†''Calymene'' sp. in the Silurian–Ordovician of Morocco
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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