eudorina
Volvox and other large colonials ( Pleodorina, Eudorina) transitioned from an isogamous ancestral mating system to an anisogamous or oogamous one with eggs and sperm.
Volvox and other large colonials ( Pleodorina, Eudorina) transitioned from an isogamous ancestral mating system to an anisogamous or oogamous one with eggs and sperm.