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:
FMIB Leptaena rhomboidalis Silurian.jpeg check categories September Leptaena rhomboidalis Silurian External view of ventral valve Interior of ventral valve occlusor scars pseudodeltidium divaricator scars hinge are teeth Interior of dorsal valve anterior occlusor scars posterior occlusor scars hinge area cardinal process chilidium