Wild Pigs:
* Wild boar (Sus scrofa): The ancestor of all domesticated pigs, found throughout Europe, Asia, and North Africa.
* Red river hog (Potamochoerus porcus): Found in West Africa, known for its red-brown fur and distinctive white stripes.
* Bush pig (Potamochoerus larvatus): Found in Sub-Saharan Africa, with a similar appearance to the red river hog but with a darker coat.
* Warthogs (Phacochoerus africanus): Found in Sub-Saharan Africa, characterized by their large tusks and distinctive facial warts.
* Babirusa (Babyrousa babyrussa): Found in Indonesia, with unique, upward-curving tusks that grow through the upper lip.
Domesticated Pigs:
* Domestic pig (Sus scrofa domesticus): The domesticated form of the wild boar, bred for meat and other products.
Other Related Species:
* Peccaries (Family Tayassuidae): Although not directly related, peccaries are the closest living relatives of pigs. Found in Central and South America, they have a similar body shape but smaller size and different social structures.
Important Note: The evolutionary relationship between pigs and other animals is complex and constantly being refined. While the above list provides a general overview, further research may reveal additional relationships.