As noted on here before, an increasing number of dinosaur species from China are known from multiple good specimens, but have yet to enter the literature. When there is a mountain of new species to describe, new material of well (and not so well) established taxa tends to fall to the bottom of the to-do list.
It was then pleasing to see a new specimen each of Microraptor (above) and Anchiornis (well, the two were labelled as such) on display at the Dino Expo. Both species are apparently very well represented in collections but only when they start being described and catalogued and their identities confirmed can we start to work on major areas of their biology that are limited to taxa with large pools of specimens – sexual dimorphism, ontogeny, intraspecific variation. Still, at least I have some photos….