The holotype, D2139, was discovered sometime before the 2000s, when Matthew Martyniuk saw a photograph of the holotype, which was then labelled as an undescribed possible dromaeosaurid.[2] The type, and only known species, D. cuhe, was named and described by Gao & Liu in 2005.[1]
More recently, it is being suspected that the specimen is a chimera forged for the fossil trade,[3] namely a Jeholornis with the arms exchanged by those of an unnamed flightless theropod.[4][2] If the holotype is not a chimera, then the phylogenetic placement of Dalianraptor is still uncertain.[4]
Description
Dalianraptor is very similar to the contemporary avialianJeholornis, though it has a longer digit I (thumb-equivalent) and shorter forelimbs,[5] which suggests it may have been flightless. It also reached about 80 centimetres (31 in) in length.
References
^ abGao and Liu (2005). "A new avian taxon from Lower Cretaceous Jiufotang Formation of western Liaoning." Global Geology, 24(4), 313-316.
^Chiappe, Luis M.; Dyke, Gareth J. (2006). "The Early Evolutionary History of Birds". Journal of the Paleontological Society of Korea. 22 (1): 133–151.
