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 Creek (Wisconsin) Calamus Creek (Wisconsin) Calamus Creek is a minor tributary of the Beaver Dam River, about long, in southeastern Wisconsin in the United States. Via the Beaver Dam, Crawfish, and Rock rivers, it is part of the watershed of the Mississippi River. Its watershed lies almost entirely within Dodge County with a small portion in neighboring Columbia County. Calamus Creek rises in west central Dodge County near the intersection of Mt. Pleasant and Van Buren roads and follows a highly winding, generally easterly course through Dodge County. It flows into the Beaver Dam River about southwest of Beaver Dam, near the