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''Genevievella'' is a genus of trilobite with an short inverted egg-shaped outline, a wide headshield, small eyes, and long genal spines. The backrim of the headshield is inflated and overhangs the first of the 9 thorax segments. The 8th thorax segment from the front bears a backward directed spine that reaches beyond the back end of the exoskeleton. It has an almost oval tailshield with 5 pairs of pleural furrows. It lived during the Upper Cambrian in what are today Canada and the United States. == Distribution == * ''G. caelata'' is known from the Upper Cambrian of Australia (Mindyallan, Upper beds Member, Mungerbar Formation, Glenormiston, Queensland, 22.9° S, 138.8° E).〔 ''cited in'' 〕 * ''G. simon'', ''G. cuniculaena'', ''G. raggedi'' and ''G. campbellina'' have been found in the Upper Cambrian of Canada (Dresbachian, Rabbitkettle Formation, Yukon, 62.7° N, 128.4° W).〔 ''cited in '' 〕 * ''G. campbellina'' occurs in the Upper Cambrian of the United States (Merioneth: Warriorsmark, Huntingdon, Huntingdon; Warrior Formation, near Waddle, Centre County, all Pennsylvania, 40.8° N, 77.9° W)〔 ''cited in'' 〕 * ''G. spinox'' has been excavated from the Upper Cambrian of the United States (Dresbachian, ''Coosella'' zone, Riley Formation, Central Texas, 30.3° N, 97.7° W)〔 ''cited in'' 〕 * ''G. bigranulosa'' is present in the Upper Cambrian of China (Guzhangian, ''Glyptagnostus stolidotus'' trilobite zone and Paibian, ''Glyptagnostus reticulatus'' trilobite zone, both Huaqiao Formation, Hunan, 28.4° N, 109.5° E).〔 ''cited in'' 〕 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「Genevievella」の詳細全文を読む スポンサード リンク
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