Paleogeographic Distribution. An extinct genus of toothed birds found in the American Cretaceous formation. ... Perhaps it may not be amiss to add that birds with teeth have been found only in the United States, and one genus, the Ichthyornis [sic], only in Kansas. Ichthyornis dispar. 1-10 Online.
It is remarkable for having biconcave vertebr'91, and sharp, conical teeth set in sockets.
Its fossil remains are known from the chalks of Alberta, Alabama, Kansas (Greenhorn Limestone), New … Ichthyornis was one of the notable discoveries of the American paleontologist Othniel Charles Marsh. The 11–12 described specimens date to approximately 150 million years ago during the Late Jurassic Epoch (163.5 million to 145 million years ago), and all were found in the Solnhofen Limestone Formation in Bavaria, Germany, starting in 1861. Turonian to Campanian. Family Ichthyornithidae Marsh, 1873 Genus Ichthyornis Marsh, 1872 Ichthyornis dispar (Marsh, 1872) Holotype.—YPM 1450, an incomplete postcranial skeleton from the Smoky Hill Chalk Member of the Niobrara Formation in Section 1, Township 6 S, Range 19 W, Rooks Co., Kansas. family Ichthyornithidae genus Ichthyornis Name Homonyms Ichthyornis Marsh, 1872 Ichthyornis Bibliographic References. Nomenclator Zoologicus vol. Referred specimens.—TMM 31051-24, a complete right humerus (Fig. Genus: Ichthyornis Marsh, 1872. Ichthyornis is a common … Its wings were well developed.
Stratigraphic Occurrences Santonian Niobrara Formation (Smoky Hill) (KS) … (Paleon.)
[NL., fr. Ichthyornis (meaning fish bird, after its fish-like vertebrae) is an extinct genus of toothed seabird-like ornithuran from the late Cretaceous period of North America. Ichthyornis was about the size of a domestic pigeon and had strongly developed wings. Amer. J. Its fossil remains are known from the chalks of Alberta, Alabama, Kansas, New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian through Campanian ages, about 95–83.5 million years ago. Archaeopteryx, genus of feathered dinosaur that was once thought to be the oldest known fossil bird. [developed by uBio, hosted online at MBLWHOI Library]. Ichthyornis was formerly grouped with Hesperornis, but it is now classified as the sole genus of the order Ichthyornithiformes. Family: † Avisauridae: Genus: † Halimornis Chiappe, Lamb & Ericson, 2002: Species: †H. Definition of Ichthyornithidae.
It lived during the Late Cretaceous about 80 mya and is known from fossils found in the Mooreville Chalk Formation in Greene County, Alabama. Sci., (3) 4 Neave, S. A. Chiappe, Lamb & Ericson, 2002. Ichthyornis Ich`thy*or"nis, n. Ichthyornis (meaning "fish bird", after its fish-like vertebrae) was a genus of toothed seabird-like avialans from the late Cretaceous period of North America.Its fossil remains are known from the chalks of Alberta, Alabama, Kansas, New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian-Campanian ages, about 95-85 mya. Species: I. dispar. Kansas to New Mexico to South Dakota. Halimornis was an enantiornithine bird. Phylum: Chordata; Class: Sauropsida; Order: Ichthyornithiformes; Family: Ichthyornidae; Genus: Ichthyornis; Species: Ichthyornis dispar Marsh, 1872; Information; Images; Maps; Geological Range. It is the type of the order Odontotorm'91. Ichthyornis was a genus of toothed seabird-like ornithuran from the late Cretaceous period of North America. thompsoni. Binomial name † Halimornis thompsoni. (1939-1996). Thus, our fossil pterodactyls have no teeth, and our birds have, in direct contrast with those found in other parts of the world."