Final answer:
The two major genera that were around in the Miocene are Proconsul and Sivapithecus.
Step-by-step explanation:
Two major genera that were around in the Miocene are Proconsul and Sivapithecus. During the Miocene epoch, which spanned from about 23 million to 5 million years ago, two major genera of apes, known for their presence around this period, were Proconsul and Sivapithecus. Proconsul africanus, the earliest Miocene ape found in Africa, lacked long, curved digits and a tail, moving primarily on all fours, which is distinctive from the well-known tailless apes of today. Sivapithecus, commonly found in Asia, shared many features with the modern orangutan, such as thick dental enamel for eating hard foods and similarities in cranial structure.