Feather birds, Oviraptorosauria and Deinonychosauria. In 1998, the discovery of a feathered oviraptorosaurian, "Caudipteryx zoui", challenged the notion of feathers as a structure exclusive to Avialae. Buried in the Yixian Formation in Liaoning, China, "C. zoui" lived during the Early Cretaceous Period. Present on the forelimbs and tails, their integumentary structure has been accepted as pennaceous vaned feathers based on the rachis and herringbone pattern of the barbs. In the clade Deinonychosauria, the continued divergence of feathers is also apparent in the families Troodontidae and Dromaeosauridae. Branched feathers with rachis, barbs, and barbules were discovered in many members including "Sinornithosaurus millenii",
Calamus, Wisconsin Calamus, Wisconsin Calamus is a town in Dodge County, Wisconsin, United States. The population was 1,005 at the 2000 census. The unincorporated community of South Beaver Dam is located in the town. The unincorporated community of Lost Lake is also located partially in the town. The town was founded on January 22, 1846. According to the United States Census Bureau, the town has a total area of 36.5 square miles (94.7 km²), of which, 36.1 square miles (93.4 km²) of it is land and 0.5 square miles (1.2 km²) of it (1.29%) is water. As of the census of 2000,