This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Diatomaceae of Philadelphia Plate . follows PLATE Fig Cymbella aspera Ehr Cl Cymbella cymbiformis Kuetz Brb Cymbella cistula Hempr Kirchn Cymbella lanceolata Ehr Kirchn Cymbella mexicana Ehr Cymbella naviculiformis Auerswald Cymbella tumida Brb Cymbella philadelphica sp Cymbella ehrenbergii Kuetz Cymbella heteropleura