hesperornis उदाहरण वाक्य
उदाहरण वाक्य
- Marsh explicitly named his second species of " Hesperornis " in 1876 for an incomplete metatarsus recovered from the same layers of the Niobrara chalk as " H . regalis ".
- Traditionally, " Hesperornis " is depicted with a mode of locomotion similar to modern loons or grebes, and study of their limb proportions and hip structure has borne out this comparison.
- He eventually received parts of 50 specimens of " Hesperornis ", which allowed him to make a much stronger demonstration of an evolutionary link between reptiles and birds than had been possible before.
- In addition to non-crown group primitive birds like " Archaeopteryx ", " Hesperornis " and " Confuciusornis ", stem group birds include the dinosaurs and the pterosaurs.
- At about long, " H . rossicus " was the largest species of " Hesperornis " and among the largest hesperornithines, slightly smaller than the large Canadian genus " Canadaga ".
- Stomach contents from a tylosaur recovered in South Dakota included remains of another mosasaur, a bony fish, the large, flightless seabird " Hesperornis ", and possibly a shark, indicating that tylosaurs were generalists.
- Its exact relationships are not completely resolved, but it probably belongs into the Hesperornithidae just like " Hesperornis ", well-known from the Western Interior Seaway that covered most of the US Midwest in the Mesozoic.
- The latter part of this section deals with analyzing the skeletal anatomy of the fossil birds " Hesperornis " and " Ichthyornis ", but Heilmann ultimately decides that they are of no importance to his investigations.
- As opposed to " Hesperornis " which almost certainly had to slide on its belly or galumph like an earless seal, " Baptornis "'s lower leg was not as firmly placed along the body sides.
- While initially placed in the new genus " Coniornis " by Marsh, this was due mostly to his belief that " Hesperornis " existed only in Kansas, so any species from Montana should be placed in a different genus.