Complex sentence: In the arrangement of cusps of molars, the construction of the metatarsal bones and the skull support a sister group relationship between these two taxa, but the striking commonality, the loss of fur and the sebaceous glands, is controversial.
Split into simpler sentences: In the arrangement of cusps of molars, the construction of the metatarsal bones and the skull support a sister group relationship between these two taxa. Whether the striking commonality, the loss of fur and the sebaceous glands is controversial.