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
The Barbs killing your parents, stealing guitars and humping till dawn ever penned". They also released an album, "Lupine Peroxide". On 1 December 2004, they were one of the headline acts at the MTV Staying Alive Music Summit, playing to a crowd of over 50,000. They also made several tours of the UK with bands such as The Rocks. Illustrator Emma Renton initially designed two of the Barbs single covers. Later, Jim Connolly was commissioned to produce comic book style artwork for their remaining sleeves. After the group broke up, guitarist Amy and guitarist/vocalist Tim went on to form What Would Jesus