Yes, I believe Adam was formed “out of the dust of the ground” with no living ancestors, in a similar way to the way God created life in the Valley of Dry Bones (Ezekiel 37), as there is greater detail in this passage. I also believe all humans have Adam as a common ancestor.
Dr. Swamidass, among others, has shown there is common ancestry of all humans in the not too distant past through studies in genealogies. I reference an article in Nature that shows common ancestry of all humans through genetics, though not quite as recent as Dr. Swamidass presented through genealogy.
Thanks for the reference, I will review it.