Nemicolopterus is a genus of pterodactyloid pterosaur, described in 2008. The type and only known species is N. crypticus. It lived in the Jehol Biota 120 million years ago. Its wingspan of slightly under 25 centimeters (10 in) makes it smaller than any but a few specimens of hatchling pterosaurs. The specimen is not yet fully grown, but Wang et al. (2008) cite the amount of bone fusion and the ossification of the toes, gastralia and sternum to indicate that it was a sub-adult rather than a hatchling.