Hesperornithiformes

Hesperornithiformes

[‚hes·pə‚rȯr‚nith·ə′fȯr‚mēz]
(paleontology)
An order of ancient extinct birds; individuals were large, flightless, aquatic diving birds with the shoulder girdle and wings much reduced and the legs specialized for strong swimming.
References in periodicals archive ?
pdf) The oldest Asian Hesperornithiform from the Upper Cretaceous of Japan, and the phylogenetic reassessment of Hesperornithiformes, " which was published on the Journal of Systematic Palaeontology website Tuesday.
Hesperornithiformes were toothed, foot-propelled diving birds and one of the most widely distributed groups of birds in the Cretaceous of the northern hemisphere.
The Galapagos cormorant and the extinct Hesperornithiformes are also flightless but employ the hind limb module in their foot-propelled locomotion.