Seems that most authors use Sus scrofa to refer to wild boar while some use Sus domesticus to refer to the domesticated pig. Both are Suidae, A family of nonruminant artiodactylous mammals consisting of the wild and the domestic swine. Apparently domesticated pigs have become feral in many parts of the world. They are then referred to as Sus scrofa again. So here’s a Sus domesticus (without wimple).