Suminia: Life in the Trees 260 Million Years Ago
(Laelaps, May 28, 2010)
When I hear the phrase “early human relative” I cannot help but think of an ape-like creature. Something like Sahelanthropus fits the bill nicely – it may not be a hominin but it is still a close relative from around the time that the first hominins evolved. That is why I was a bit puzzled to see MSNBC.com parroting a story written by the Discovery Channel which proclaimed “Early human relative predates even dinosaurs”! Was this another fossil that would change everything? While not quite as startling as a Precambrian rabbit, a 260-million-year-old-hominin (or even primate) would certainly be a shocker!
The truth of the matter, however, is that the fossil described in the MSNBC story is only a distant relative of humans. Called Suminia getmanovi, it was a synapsid (the diverse group of vertebrates to which mammals and their closest relatives belong) that lived during the Permian in what is now Russia. More specifically, it was an anomodont, or a relative of the tubby Lystrosaurus and the small, tusked Robertia. The attempt to make Suminia relevant to human ancestry, therefore, was a quick and dirty way of grabbing attention, but in this case I think it stirred more confusion than enlightenment.
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