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Rhamphotheca |
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Rhamphotheca
the horny covering of a bird’s bill. The rhamphotheca forms the culmen on the upper jaw and the gonys on the lower jaw. It usually consists of one piece, but in cormorants, gannets, geese, skuas, and Procellariiformes it is made up of separate parts. The rhamphotheca may have various growths and teeth, and there is a cere in the proximal section of the rhamphotheca. Molting of the rhamphotheca usually involves the continual breaking and falling away of the horny layer; less frequently it falls off all at once, as in the seasonal molt of grouse. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | 9) One had scissor-bill deformity and the other had an incompletely developed, shortened rhamphotheca. |
Rhamphotheca |
Rhamnus Rhamnus californica Rhamnus californicus Rhamnus carolinianus Rhamnus cathartica Rhamnus catharticus Rhamnus croceus Rhamnus frangula Rhamnus frangula Rhamnus paliurus Rhamnus purshiana Rhamnus purshiana Rhamnus purshiana Rhamnus purshianus Rhamnus Soporifer Rhamnus spina-christi Rhamoxilina Rhamoxilina Rhampastidae Rhampastidae Rhampastidae Rhamphastidae Rhamphastidae Rhamphastidae rhamphoid Rhamphorhynchoid Rhamphorhynchoidea Rhamphorhynchoidei Rhamphorhynchus Rhamphostoma Rhamphotheca rhampothecaRHAN RHANAC Rhandeia, Peace of Rhangavis, Alexandros Rizos RHANW RHAP rhAPC rhaphae rhaphe rhaphe rhaphe Rhaphides rhaphy Rhapidophyllum hystrix Rhapis Rhapis excelsa Rhapis humilis Rhaponticine Rhaponticum Rhaponticum carthamoides RHAPS rhapsode rhapsode Rhapsoder Rhapsodes rhapsodic rhapsodic rhapsodic | |||||||
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