Labial consonants are consonants in which one or both lips are the active articulator. The two common labial articulations are bilabials, articulated using both lips, and labiodentals, articulated with the lower lip against the upper teeth, both of which are present in English. A third labial articulation is dentolabials, articulated with the upper lip against the lower teeth, normally only found in pathological speech. Generally precluded are linguolabials, in which the tip of the tongue contacts the posterior side of the upper lip, making them coronals, though sometimes, they behave as labial consonants.
Ahaetulla prasina is a species of snake in the family Colubridae native to southern Asia. Its common names include Asian vine snake, Boie's whip snake, Gunther's whip snake, and Oriental whip snake.
The collared reed snake is a species of colubrid snake found in Asia. In Japan, it is also called Miyara's collared snake.
Lycodon aulicus, commonly known as the Indian wolf snake, is a species of nonvenomous snake found in South Asia and Southeast Asia. Early naturalists have suggested its resemblance to the venomous common krait as an instance of Batesian mimicry.
The painted keelback is a species of colubrid snake found in Pakistan, Nepal, Bangladesh, and India. This snake is also called the dark-bellied marsh snake.
Sibynophis subpunctatus, commonly known as Duméril's black-headed snake or Jerdon's many-toothed snake, is a species of nonvenomous colubrid snake endemic to Bangladesh, India and Sri Lanka.
Psammophis condanarus, the sand snake, is a species of snake found in dry low country zones of Indian peninsula, Pakistan and Nepal. It is a fast-moving, diurnal, terrestrial species and lives in stony outcrops and boulders. It was first described from Ganjam area of Odisha State and then later on recorded from many parts of the Indian subcontinent.
Heterodon is a genus of harmless colubrid snakes endemic to North America. They are stout with upturned snouts and are perhaps best known for their characteristic threat displays. Three species are currently recognized. Members of the genus are commonly known as hog-nosed snakes, North American hog-nosed snakes, and sometimes puff adders.
The inferior labial artery arises near the angle of the mouth as a branch of the facial artery; it passes upward and forward beneath the triangularis and, penetrating the orbicularis oris, runs in a tortuous course along the edge of the lower lip between this muscle and the mucous membrane.
Snakes, like other reptiles, have a skin covered in a scale. Snakes are entirely covered with scales or scutes of various shapes and sizes, known as snakeskin as a whole. A scale protects the body of the snake, aids it in locomotion, allows moisture to be retained within, alters the surface characteristics such as roughness to aid in camouflage, and in some cases even aids in prey capture. The simple or complex colouration patterns are a property of the underlying skin, but the folded nature of scaled skin allows bright skin to be concealed between scales then revealed in order to startle predators.
The labial scales are the scales of snakes and other scaled reptiles that border the mouth opening. These do not include the median scales on the upper and lower jaws. The term labial originates from Labium, which refers to any lip-like structure. In snakes, there are two different types of labial scales: supralabials and sublabials. The numbers of these scales present, and sometimes the shapes and sizes, are some of many characteristics used to differentiate species from one another.
The rostral scale, or rostral, in snakes and other scaled reptiles is the median plate on the tip of the snout that borders the mouth opening. It corresponds to the mental scale in the lower jaw. The term pertains to the rostrum, or nose. In snakes, the shape and size of this scale is one of many characteristics used to differentiate species from one another.
In reptiles, the supralabial scales, also called upper-labials, are those scales that border the mouth opening along the upper jaw. They do not include the median scale. The term labial originates from Labium, which refers to any lip-like structure. The numbers of these scales present, and sometimes the shapes and sizes, are some of many characteristics used to differentiate species from one another.
The Cameroon racer, Poecilopholis cameronensis, is a species of fangless venomous snake endemic to Africa. Poecilopholis is a monotypic genus created for this species.
The pine woods snake, also commonly known as the yellow-lipped snake or the brown-headed snake, is a species of secretive colubrid found in scattered locations across the Southeastern United States. Rhadinaea flavilata is rear-fanged and mildly-venomous, but not dangerous to humans.
Atractaspis aterrima, commonly known as the slender burrowing asp or mole viper, is a species of fossorial, venomous snake in the family Atractaspididae. The specific epithet, aterrima, meaning "blackest", is the superlative form of the Latin adjective ater, meaning "black".
Polemon acanthias, or Reinhardt's snake-eater, is a species of venomous rear-fanged snake in the family Atractaspididae. It is endemic to Africa.
Polemon gabonensis, or the Gaboon snake-eater, is a species of venomous rear-fanged snake in the family Atractaspididae. It is endemic to Africa.
Aparallactus werneri, or the Usambara centipede-eater, is a species of venomous rear-fanged snake in the family Atractaspididae.
