Concornis lacustris

Concornis is a genus of enantiornithean birds which lived during the early Cretaceous period, in the late Barremian age about 125 million years ago. Its remains are known from the Calizas de La Huérgina Formation at Las Hoyas, Cuenca province, Spain. The single known species, Concornis lacustris, was described from the remains of one fairly complete individual skeleton.

== Description == The holotype of Concornis, MCCM-LH-1184 (also known as LH-2814) was initially described in 1992, while the specimen was still partially covered in sandstone. This preliminary description was published to record an aspect of the specimen which would be erased upon further preparation: faint traces of wing feathers visible under ultraviolet light. Once the specimen was prepared, most of these traces were destroyed but in return the skeleton was able to be studied in closer detail. A large redescription was published in 1995 once further preparation concluded. The specimen is almost complete, only missing a few elements such as the skull, neck, and pygostyle.