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 Journal, associated himself with Mr. Barter and the paper was continued under the name of Barter and Sunderlin. It did not have a very long existence and for various reasons it suspended publication. Whip and Cook printed a newspaper here in the 1880s. It also had a very brief existence. The Calamus Record was the latest newspaper venture for Calamus. It was established in 1901 by A.J. Gault and enjoyed a longer existence than the other newspapers. Calamus is located at (41.826669, -90.759793). Olive Township, Clinton County, Iowa According to the United States Census Bureau, the city has a total