Pennaceous feather Pennaceous feather The pennaceous feather is a type of feather present in most modern birds and in some other species of maniraptoriform dinosaurs. A pennaceous feather has a stalk or quill. Its basal part, called a "calamus", is embedded in the skin. The calamus is hollow and has pith formed from the dry remains of the feather pulp, and the calamus opens below by an "inferior umbilicus" and above by a "superior umbilicus". The stalk above the calamus is a solid "rachis" having an umbilical groove on its underside. Pennaceous feathers have a rachis with "vanes" or "vaxillum " spreading
Calamus-Wheatland High School Calamus-Wheatland High School Calamus Wheatland High School is a four-year comprehensive high school located in Wheatland, Iowa. The school is part of the Calamus-Wheatland Community School District, and has an enrollment of approximately 120 students in grades nine through 12. Located approximately one mile north of U.S. Highway 30 in Wheatland, Calamus-Wheatland High School draws students from several communities in western and southwestern Clinton County, including Calamus, Wheatland and Toronto; the district also includes a small portion of northwestern Scott County, drawing students from Big Rock and rural areas north and west of Dixon. Calamus-Wheatland came into being in 1986,