Miocene Normal and pathalogical clams, the so-called Venus Tridachnoides supposed to be the pathologic race of the previous species and is derived from the miocene deposits of York River Virginnia

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Miocene Normal and pathalogical clams, the so-called Venus Tridachnoides supposed to be the pathologic race of the previous species and is derived from the miocene deposits of York River Virginnia. Wellcome Collection. Source: Wellcome Collection.