ignored in the scientific literature in favor of the order-level name Hesperornithiformes, coined one year later. In 2004, Clarke became the first to define...

loons. More recent work looking at the morphometrics of the feet in hesperornithiformes and modern sea birds has thrown this interpretation into question...

represented by a single species; the leatherback sea turtle. The Hesperornithiformes were flightless, marine diving birds that swam like grebes. Baculites...

latter included the superficially gull-like Ichthyornis and the Hesperornithiformes, which became so well adapted to hunting fish in marine environments...

known to occur in the Cretaceous period, the earliest being the Hesperornithiformes, like Hesperornis regalis, a flightless loon-like seabird that could...

hdl:1807/77762. Tim T. Tokaryk; C. R. Harington (1992). "Baptornis sp. (Aves: Hesperornithiformes) from the Judith River Formation (Campanian) of Saskatchewan, Canada"...

A Classification Uncertain Ricardoestesia gilmorei Birds such as Hesperornithiformes were present, as well as giant Pterosauria related to Quetzalcoatlus...

or ducks, like Gansus. Some evolved as swimming hunters, like the Hesperornithiformes – a group of flightless divers resembling grebes and loons. While...

considered to be the first freshwater and latest record of the order Hesperornithiformes. Although hesperornithiforms probably lost their flight abilities...

between loons and the entirely unrelated extinct Cretaceous order Hesperornithiformes. In particular Enaliornis, which was apparently an ancestral and...

O. Averianov (2004). "New record of Hesperornis rossicus (Aves, Hesperornithiformes) in the Campanian of Saratov Province, Russia". Paleontological Research...

fossil birds: inferences for the locomotion of Hesperornis regalis (Hesperornithiformes) and Emeus crassus (Dinornithiformes)". Journal of Ornithology. 156...

ISBN 978-0-315-61682-0. Aotsuka, Keiichi; Sato, Tamaki (2016-08-01). "Hesperornithiformes (Aves: Ornithurae) from the Upper Cretaceous Pierre Shale, Southern...

remains present in the Mussentuchit Member. Possible indeterminate hesperornithiformes present in the Mussentuchit Member. Besides dinosaurs, the Cedar...

Upper Cretaceous of Japan, and the Phylogenetic Reassessment of Hesperornithiformes. Journal of Systematic Palaeontology. doi:10.1080/14772019.2017.1341960...

73–80. Retrieved 4 September 2020. Aotsuka, K. and Sato, T. (2016). Hesperornithiformes (Aves: Ornithurae) from the Upper Cretaceous Pierre Shale, Southern...

features. The parapophyses in its vertebrae are similar to the extinct Hesperornithiformes, which were toothed diving birds. In their phylogenetic analyses...

Smoky Hill Member of the Niobrara Chalk  United States A member of Hesperornithiformes. The type species is Fumicollis hoffmani. Gallinago azovica Sp. nov...

tibiotarsi, and they seem certainly more similar to the bones of Hesperornithiformes and (due to the smallish size) to Parahesperornis specifically. However...

Upper Cretaceous of Japan, and the Phylogenetic Reassessment of Hesperornithiformes". Journal of Systematic Palaeontology. 16 (8): 689–709. doi:10.1080/14772019...

A.; Chaippe, L.M. (2022). Buffetaut, E.; Angst, D. (eds.). "The Hesperornithiformes: A Review of the Diversity, Distribution, and Ecology of the Earliest...

fossil birds with the presence of teeth, specifically of the orders Hesperornithiformes and Ichthyornithiformes. As such they would be regarded as transitional...

1872; Plegadornis Wetmore 1962 non Brehm 1855] (Late Cretaceous) †Hesperornithiformes Fürbringer 1888 (Large, toothed, loon-like diving birds) †Chupkaornis...

2015-11-30. Retrieved 2014-08-19. Lev A. Nessov; A. A. Yarkov (1993). "Hesperornithiformes in Russia". Russian Journal of Ornithology. 2: 37–54. Luis M. Chiappe...

doi:10.1016/j.jop.2022.08.002. Bell A, Chiappe LM (2022). "The Hesperornithiformes: A Review of the Diversity, Distribution, and Ecology of the Earliest...

Upper Cretaceous of Japan, and the phylogenetic reassessment of Hesperornithiformes". Journal of Systematic Palaeontology. 16 (8): 689–709. Bibcode:2018JSPal...

Upper Cretaceous of Japan, and the phylogenetic reassessment of Hesperornithiformes". Journal of Systematic Palaeontology. 16 (8): 689–709. doi:10.1080/14772019...

org/10.1371/journal.pone.0141690 Martin L, Tate J. The skeleton of Baptornis advenus (Aves: Hesperornithiformes). Smith Cont Pal. 1976; 27: 35–66. v t e...

[Large, Evolutionarily Advanced, Flightless Marine Birds of the Order Hesperornithiformes from the Late Senonian of the Turgai Strait: The first Finds of this...

Cretaceous Cenomanian, Ashville Formation  Canada:  Saskatchewan An Hesperornithiformes Fürbringer, 1888, Baptornithidae American Ornithologists’ Union,...