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A snout is the protruding portion of an animal's face, consisting of its nose, mouth, and jaw. In many animals, the structure is called a muzzle , [ 1 ] rostrum , beak or proboscis . The wet furless surface around the nostrils of the nose of many mammals is called the rhinarium (colloquially this is the "cold wet snout" of some mammals).
Rhinogrades are mammals characterized by a nose-like feature called a "nasorium", the form and function of which vary significantly between species. [ 4 ] [ 7 ] According to Stümpke, the order's remarkable variety was the natural outcome of evolution acting over millions of years in the remote Hy-yi-yi islands.
The beak or snout of a vertebrate may also be referred to as the rostrum. Some cetaceans, including toothed whales such as dolphins [7] [8] and beaked whales, have rostrums (beaks) which evolved from their jawbones. The narwhal possesses a large rostrum (tusk) which evolved from a protruding canine tooth.
A proboscis (/ p r oʊ ˈ b ɒ s ɪ s,-k ɪ s /) is an elongated appendage from the head of an animal, either a vertebrate or an invertebrate. In invertebrates, the term usually refers to tubular mouthparts used for feeding and sucking. In vertebrates, a proboscis is an elongated nose or snout.
The rhinarium (Neo-Latin, "belonging to the nose"; pl.: rhinaria) [1] is the furless skin surface surrounding the external openings of the nostrils in many mammals. Commonly it is referred to as the tip of the snout , and breeders of cats and dogs sometimes use the term nose leather .
The critter’s robust skull had additional bones and elements that have likely disappeared with evolution, and its elongated snout paired with a short region of the skull behind the eyes was ...
The snout of Acamptonectes was elongated and extremely slender; in the holotype, it is only 45 mm (1.8 in) wide in front of the bony nostrils. The snout was also only 0.044 times as deep as it was long, one of the lowest ratios among ophthalmosaurids. Much of the snout was formed by the premaxillae, which formed the front portion of the upper jaw.
Wilson’s wedge-snouted skinks are considered “medium-sized,” reaching about 5.6 inches in length, the study said. They have a “cylindrical” body, “long” tail and “wedge-shaped ...