and German paleontologists have discovered near Krasnoyarsk two new species of middle Jurassic mammals from the group multituberculata, reported in Papers in Palaeontology. Considering that the teeth of these animals are some primitive features, and in Western Siberia no findings of basal multituberculata, it can be assumed that this region was once the centre of origin of the group.
Multituberculata, they mnogoborya — a large group of primitive mammals: there are now about 200 of their species. She appeared in the late Triassic (according to some estimates, 208 million years ago) and became extinct in the early Oligocene (about 35 million years ago). Mnogoborya separated from the common stem class before was actually animals — marsupials and placentals. Name multituberculata was due to the structure of the molars: they have many tubercles (tuberculum Latin), while other mammals have three. The group existed for a very long time, at least 160 million years, but could not compete with anatomically more advanced detachments of the placenta, which appeared in the Eocene (primarily rodents), or have not adapted to climate change or the emergence of new predators, that they hunted.
The remains megalogistic find in North America and in Eurasia, mainly in China, Mongolia and England. Representatives of euharlee like multituberculate group, but with a more primitive structure of the ear and jaws, a few years ago foundn and German paleontologists in Berezovsky quarry near the town of Sharypovo in Krasnoyarsk Krai. In his new work they described two new species megalogistic from the same location — tastyteo early (Tashtykia primaeva) and Tamariu ancient (Tagaria antiqua). Such names they received in honor of tashtyk, and Tagar cultures, whose members lived in Siberia for a few hundred years BC.