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Ichthyornis (meaning "fish bird", after its fish-like vertebrae) is an extinct genus of toothy seabird-like ornithuran from the late Cretaceous period of North America.Its fossil remains are known from the chalks of Alberta, Alabama, Kansas (Greenhorn Limestone), New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian through ...
Ichthyornis fossils were first unearthed in the 1870s, but the new ones from Kansas and Alabama chalk deposits, reveal far more about it than once known. Ancient bird with beak and teeth blended ...
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The answer basically comes down to weather or not Ichthyornis had a predentary bone. Many older sources suggest this is unique to hesperornitheans, but it has since been found in a wide variety of Jehol ornithuromorphs. Ichthyornis skull material is not exactly the greatest, but it probably did have a predentaty. If it didn't, then the lower ...
Pteranodon skeleton. A toothless Late Cretaceous pterosaur, it was similar to Pelagornis in size and proportions and possibly in feeding habits.. Unlike the true teeth of Mesozoic stem-birds like Archaeopteryx or Ichthyornis, the pseudoteeth of the pelagornithids do not seem to have had serrated or otherwise specialized cutting edges, and were useful to hold prey for swallowing whole rather ...
Apart from the obvious similarities to fish, ichthyosaurs also shared parallel developmental features with dolphins, lamnid sharks, and tuna. This gave them a broadly similar appearance, possibly implied similar activity levels (including thermoregulation), and presumably placed them broadly in a similar ecological niche .
Both transport water through the Sacramento-San Joaquin River Delta, an estuarythat provides critical habitat to fish and wildlife including salmon and the delta smelt, one of Trump's fascinations. Southern California gets about half its water from local supplies such as groundwater, according to the Metropolitan Water District of Southern ...
According to the organization, the fish is a so-called "black seadevil" known by its scientific name Melanocetus johnsonii. They typically swim between 650 and 6,500 feet below the ocean's surface.