The holotype of <i>Microraptor gui</i>, IVPP V 13352 under UV light.
Different filters were employed for parts A and B, hence the difference in colour and appearance. A also is labeled to indicate the preserved feathers (grey arrows) and the 'halo' around the specimen where they appear to be absent (black arrows) as well as phosphatised tissues (white arrows). Scale bars are 5 cm in both A and B.
David W. E. Hone, Helmut Tischlinger, Xing Xu, Fucheng Zhang
CC BY 2.5
Hone DWE, Tischlinger H, Xu X, Zhang F (2010) The Extent of the Preserved Feathers on the Four-Winged Dinosaur <i>Microraptor gui</i> under Ultraviolet Light. PLoS ONE 5(2): e9223. doi:<a rel="nofollow" class="external text" href="http://dx.plos.org/10.1371/journal.pone.0009223">10.1371/journal.pone.0009223</a>