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Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Amphora robusta Greg Amphora crassa Greg Amphora obtusa Greg Amphora proteus Greg Amphora ovalis Brb Kuetz Amphora coffiformis Ag Kuetz Amphora lineolata Ehr Amphora areolata Grun Amphora ostrearia Brb Amphora lvis Greg Amphora ocellata var cingulata Cleve Amphora