Sinornithosaurus form from those found on birds from the same geological deposits. The body (contour) feathers were generally between 3-4.5 cm long and included two types: the first type are formed of several filaments joined together into "tufts", similar to modern down feathers. The second type, including those on the arms, were composed of rows of filaments ("barbs") joined together along a main shaft ("rachis"), making them similar in structure to modern bird feathers. However, unlike the wing feathers of flying birds, they did not have the secondary branches with tiny little hooks ("barbules") that flight feathers have, which allow the
Calamus, Iowa Clinton to Clarence, Iowa. It was called the Chicago, Iowa and Nebraska Railroad, later changed to Chicago Northwestern Railroad Co.. In the same year, Joseph D. Fegan was deputized to go to the cross roads of the Stage Coach Lines and the Indian Trails at Syracuse, which had a small stove and a saloon, to establish a post office in 1858. No one could suggest a name and Mr. Fegan asked "Is there no creek or anything?" "Yes, Calamus Creek." "Then let it be Calamus." Due to the large hazardous swamps, the Post Office and railway station were moved to