Their size may indicate that they were seen as competition for food, a target for hunters or simply that like many large species they were simply too slow to adapt to a changing environment. They have been able to successful adapt to changes in their environment. There is plenty we don’t know about the evolution of the Lemur. But why did one of her evolutionary offspring go on to accomplish so much more than the other? Lemurs are a kind of pro-simian which is a suborder of primates which are themselves of the order of mammals. The species that would become the lemurs existed in Africa, though it may not have originated their, in the distant past. The lemurs of Madagascar have evolved with the island, influencing the plant life, and filling every available niche to for an astoundingly diverse superfamily of multitudinous shapes and sizes. In fact, the main reason they are endangered (most of them) is due to human actions and not their inability to survive in their natural environment. While modern-day lemurs evolved from one branch, humans evolved from the other. Once on the island, the lemur lineage diversified. The evolutionary history of the primates can be traced back 57-85/90 million years. This shows that they separated early from the from the rest of the primate evolutionary path but also that their was no need to evolve these characteristics within their new environment. Extinction crisis: The unique lemur species of today were able to evolve due to their isolation on the island of Madagascar. Nocturnal lemurs with omnivorous diets tend to evolve smaller bodies, while larger lemurs that are active during the day rely on tree leaves for their meals. However, we do have some basic information that has come to light. Subsequently, they evolved into the 22 or more mostly arboreal species of today. Although lemurs often are confused with ancestral primates, the anthropoid primates (monkeys, apes, and humans) did not evolve from them; instead, lemurs merely share morphological and behavioral traits with basal primates. It was believed that they traveled across a land bridge that connected Africa to Madagascar but recent geological evidence has shown that Madagascar was already separated from Africa by water when the first pro-simians arrived their. I'm not about to go on a creationist rant but I am about to explain hopefully dispel some common misconceptions about evolution. One of the oldest known primate-like mammal species, Plesiadapis, came from North America; another, Archicebus, came from China. Lemurs may have floated there eons ago on “rafts” of vegetation and evolved in isolation over countless centuries. We aren’t sure though how the linage for the Lemur and other primates connects. Other similar basal primates were widespread in Eurasia and Africa during the tropical conditions of the Paleocene and Eocene. At some point some of that species migrated from Africa to Madagascar. Lemurs: How Did They Evolve? Contrary to popular belief, lemurs did not evolve from human ancestral primates. However, they have long been at risk due to the threats of humans. They branched off from the evolutionary path that resulted in apes and monkeys. Lemurs are far from the most primitive primates alive today. The final stage of Lemur evolution began about 2000 years ago when the first humans arrived on Madagascar. What any observer of the lemurs of Madagascar immediately notices, before anything else, is that they are amazingly diverse. By David Derbyshire for MailOnline Updated: 13:10 EST, 21 May 2009 Or not. There is a progression from prosimians like tarsiers to lemurs to monkeys to apes. 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