Complex sentence: There are two "types" of gemsbok: a northern and southern variety; the only difference being that the northern gemsboks have black-fringed ears while the southern ones have longer horns and more rounded ears.
Split into simpler sentences: There are two "types" of gemsbok: a northern and southern variety. The only difference being that the northern gemsboks have black-fringed ears while the southern ones have longer horns and more rounded ears.