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Gape Flange
The beak, bill, or rostrum is an external anatomical structure found mostly in birds, but also in turtles, non-avian dinosaurs and a few mammals. A beak is used for pecking, grasping, and holding (in probing for food, eating, manipulating and carrying objects, killing prey, or fighting), preening, courtship, and feeding young. The terms ''beak'' and ''rostrum'' are also used to refer to a similar mouth part in some ornithischians, pterosaurs, cetaceans, dicynodonts, rhynchosaurs, anuran tadpoles, monotremes (i.e. echidnas and platypuses, which have a bill-like structure), sirens, pufferfish, billfishes, and cephalopods. Although beaks vary significantly in size, shape, color and texture, they share a similar underlying structure. Two bony projections–the upper and lower mandibles–are covered with a thin keratinized layer of epidermis known as the rhamphotheca. In most species, two holes called ''nares'' lead to the respiratory system. Etymology Although the word "beak" was, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhynchosaur
Rhynchosaurs are a group of extinct herbivorous Triassic archosauromorph reptiles, belonging to the order Rhynchosauria. Members of the group are distinguished by their triangular skulls and elongated, beak like premaxillary bones. Rhynchosaurs first appeared in the Early Triassic, reaching their broadest abundance and a global distribution during the Carnian stage of the Late Triassic. Description Rhynchosaurs were herbivores, and at times abundant (in some fossil localities accounting for 40 to 60% of specimens found), with stocky bodies and a powerful beak. Early primitive forms, like '' Mesosuchus'' and '' Howesia'', were generally small, typically lizard-like in build, and had skulls rather similar to the early diapsid ''Youngina'', except for the beak and a few other features. Later and more advanced genera grew to up to two meters in length. The skull in these forms were short, broad, and triangular, becoming much wider than long in the most advanced forms like '' Hype ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anglo-Norman Language
Anglo-Norman (; ), also known as Anglo-Norman French, was a dialect of Old Norman that was used in Kingdom of England, England and, to a lesser extent, other places in Great Britain and Ireland during the Anglo-Normans, Anglo-Norman period. Origin The term "Anglo-Norman" harks back to the time when the language was regarded as being primarily the regional dialect of the Norman settlers. Today the generic term "Anglo-French" is used instead to reflect not only the broader origin of the settlers who came with William the Conqueror, but also the continued influence of Parisian French from the House of Plantagenet, Plantagenet period onwards. According to some linguists, the name Insular French might be more suitable, because "Anglo-Norman" is constantly associated with the notion of a mixed language based on English and Norman. According to some, such a mixed language never existed. Other sources, however, indicate that such a language did exist, and that it was the language desc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
