Progeny: is the child or descendant of the father or parent.
progenito is incorrectly written, and should be written as "Progenito" as meaning: Progenito or parent is the first direct ancestor of a living being. Father or mother of an animal or a human being. It is valid even for plants. Who originates a progeny.
It is not recognised by the Royal Academy of the Spanish language. Missing definition for this word in particular, may have wanted to say parent, who was named to the father or mother in a more impersonal way, being habitual use in legal language.