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- Pennaceous_feather abstract "Pennaceous feathers. This type of feather is present in most modern birds and has been shown in some 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 central shaft (or rachis) with vanes or vaxillum spreading to either side. These vanes are composed of a high number of flattened barbs, that are connected to one another with barbules.The barbules are tiny strands that criss-cross on the flattened side s of the barbs. This forms a kind of miniature velcro-like mesh that holds all the barbs together, stabilizing the vanes.Pennaceous feathers on the forelimb or wing are often attached strongly due to stresses related to flight or other activities. This strong attachment is accomplished by ligaments under the skin, which in some birds and feathered dinosaurs results in raised bumps or marks along the rear forelimb bone (ulna). These bumps, called "quill knobs" (ulnar papillae) are often used as an indirect indication of strongly-attached forelimb feathers in fossil species, and can also indirectly indicate the number of secondary regimes in a given specimen.Flight feathers (remiges and rectrices) are specialized types of pennaceous feathers, adapted for high loadings and often strongly asymmetric for improved flight performance.".
- Pennaceous_feather wikiPageID "1088495".
- Pennaceous_feather wikiPageRevisionID "596352842".
- Pennaceous_feather hasPhotoCollection Pennaceous_feather.
- Pennaceous_feather subject Category:Feathers.
- Pennaceous_feather type Abstraction100002137.
- Pennaceous_feather type AnimalMaterial114755804.
- Pennaceous_feather type BodyCovering105237755.
- Pennaceous_feather type Covering109257949.
- Pennaceous_feather type Feather101896031.
- Pennaceous_feather type Feathers.
- Pennaceous_feather type Material114580897.
- Pennaceous_feather type Matter100020827.
- Pennaceous_feather type NaturalObject100019128.
- Pennaceous_feather type Object100002684.
- Pennaceous_feather type Part113809207.
- Pennaceous_feather type PhysicalEntity100001930.
- Pennaceous_feather type Relation100031921.
- Pennaceous_feather type Substance100019613.
- Pennaceous_feather type Whole100003553.
- Pennaceous_feather comment "Pennaceous feathers. This type of feather is present in most modern birds and has been shown in some 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.".
- Pennaceous_feather label "Konturfeder".
- Pennaceous_feather label "Pennaceous feather".
- Pennaceous_feather sameAs Konturfeder.
- Pennaceous_feather sameAs m.044yz4.
- Pennaceous_feather sameAs Q1783398.
- Pennaceous_feather sameAs Q1783398.
- Pennaceous_feather sameAs Pennaceous_feather.
- Pennaceous_feather wasDerivedFrom Pennaceous_feather?oldid=596352842.
- Pennaceous_feather isPrimaryTopicOf Pennaceous_feather.