sentences:  It is known from a single fossil individual, including preserved vertebrae, leg bones and part of the humerus (upper arm bone).At the time, the area where the Mooreville Chalk was deposited was situated on the southern coast of the Western Interior Seaway, and may have been the site of a large delta where several major rivers flowed into the shallow sea.The fossil bird was found at a location that would have been about 50 km off shore, indicating that it was an ocean-going species.