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:
Symsagittifera schultzei from Graff . en Symsagittifera schultzei Aceola Sagittiferidae The designation can be found biodiversitylibrary org page here Graff Die Organisation der Turbellaria Acoela mit einem Enhange ueber den Bau und Bedeutung der Chlorophyllzellen von Convoluta roscoffensis von Gotlieb Haberlandt Leipzig Wilhelm