PLATO Notes, created by David R. Woolley in 1973, was among the world's first online message boards, and years later became the direct progenitor of Lotus Notes.

One of its cousins would be direct progenitor to the line of chordates that vertebrates belong to.

Wagner's Ring cycle, a direct progenitor of Tolkien's myth, was forged in the same crucible.

The readings Blackburn organized were the direct progenitors to the St. Mark's Poetry Project on the Bowery (see external link below).

Speed metal originated in the late 1970s and early 1980s and was the direct musical progenitor of thrash metal.

The Bogomili heretics at one point mainly were centered in Bulgaria and are now known by historians as the direct lineal progenitors of the Cathari.

The Alpine Spaniel was one of the direct genetic progenitors to the St. Bernard.

The Siyin regarded Pu Thuantak as the direct progenitor of the Siyin and Vaiphei.

In particular, certain German constitutional rights can be identified as the direct progenitors of the Habeas Data right.

Some historians have theorized that the Xianbei were the direct progenitors of the Xibo, and this idea is popular among the Xibo themselves.