| Calliophis bivirgatus | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Serpentes |
| Family: | Elapidae |
| Genus: | Calliophis |
| Species: | C. bivirgatus |
| Binomial name | |
| Calliophis bivirgatus (F. Boie, 1827) | |
| Synonyms | |
Calliophis bivirgatus is a species of snake in the family Elapidae known commonly as the blue coral snake [1] or blue Malayan coral snake. [2] [3] It is native to Southeast Asia. [1]
This terrestrial snake occurs in Brunei, Indonesia, Malaysia, Singapore, Thailand, [1] and Burma. [3] It lives at 100 to 1,100 metres (300 to 3,600 ft) in elevation. [1]
There are three subspecies: [3]
This species was assigned to the new world coral snake genus Maticora until phylogenetic studies revealed this species to be nested within the tropical coral snake species clade Calliophis and sister species to Calliophis intestinalis , the banded Malaysian coral snake. [4]
This is a medium-sized coral snake with a slender body. The adult can reach 1.8 metres (5 ft 11 in) long. It has a red head, tail and belly. The back is dark blue to black in color, and it usually has a large blue [2] or white stripe on each flank. [5]
The snake, especially when juvenile, is often confused with the pink-headed reed snake (Calamaria schlegeli) as they share similar habitat and appearance. But the latter is much smaller, reaching a maximum length of 50 cm (20 in). The reed snake is nonvenomous, while the coral snake is potentially lethal. [2] [3] They also are very similar to another venomous snake, the red-headed krait ( Bungarus flaviceps ).
This uncommon snake is considered semi-fossorial and is found in the leaf litter of primary and secondary forests. [1] It preys on other snakes. When threatened it usually flees, but it may remain in place with its red tail erect as a defensive message. [2]
Blue coral snake venom has only occasionally caused human deaths. [6] This species has unusually long venom glands, extending to 25% of the length of the body. [6] The venom contains a neurotoxin, Calliotoxin, that causes near instantaneous paralysis by delaying inactivation of the prey's sodium channels. [7] . This effect has not been observed in humans. The venom also contains phosphodiesterases, which promote the release of adenosine, causing in turn hypotension, inflammation, and neurotransmitter blockade in prey items and other bite victims. [6] This ability is especially important as their prey consists mostly of other venomous snakes.
In humans, local effects of a bite self-resolve without complication and systemic effects are rare. [8]
There is hope that the venom may eventually prove useful in the management of chronic pain in humans. [9]
The king cobra is a venomous snake endemic to Asia. The sole member of the genus Ophiophagus, it is not taxonomically a true cobra, despite its common name and some resemblance. With an average length of 3.18 to 4 m and a record length of 5.85 m (19.2 ft), it is the world's longest venomous snake. The species has diversified colouration across habitats, from black with white stripes to unbroken brownish grey. The king cobra is widely distributed albeit not commonly seen, with a range spanning from the Indian Subcontinent through Southeastern Asia to Southern China. It preys chiefly on other snakes, including those of its own kind. This is the only ophidian that constructs an above-ground nest for its eggs, which are purposefully and meticulously gathered and protected by the female throughout the incubation period.
Elapidae is a family of snakes characterized by their permanently erect fangs at the front of the mouth. Most elapids are venomous, with the exception of the genus Emydocephalus. Many members of this family exhibit a threat display of rearing upwards while spreading out a neck flap. Elapids are endemic to tropical and subtropical regions around the world, with terrestrial forms in Asia, Australia, Africa, and the Americas and marine forms in the Pacific and Indian Oceans. Members of the family have a wide range of sizes, from the 18 cm (7.1 in) white-lipped snake to the 5.85 m king cobra. Most species have neurotoxic venom that is channeled by their hollow fangs, and some may contain other toxic components in various proportions. The family includes 55 genera with around 360 species and over 170 subspecies.
Coral snakes are a large group of elapid snakes that can be divided into two distinct groups, the Old World coral snakes and New World coral snakes. There are 27 species of Old World coral snakes, in three genera, and 83 recognized species of New World coral snakes, in two genera. Genetic studies have found that the most basal lineages have origins in Asia, suggesting that the group originated in the Old World. While new world species of both genera are venomous, their bites are seldom lethal; only two confirmed fatalities have been documented in the past 100 years from the genus Micrurus. Meanwhile, snakes of the genus Micruroides have never caused a medically significant bite.
Bungarus is a genus of elapids native to Asia. Often found on the floor of tropical forests in South Asia, Southeast Asia and Southern China, they are medium-sized, highly venomous snakes with a length typically not exceeding 2 metres. These are nocturnal ophiophagious predators which prey primarily on other snakes at night, occasionally taking lizards, amphibians and rodents. Most species are with banded patterns acting as a warning sign to their predators. Despite being considered as generally docile and timid, kraits are capable of delivering highly potent neurotoxic venom which is medically significant with potential lethality to humans. The genus currently holds 16 species and 5 subspecies.
The Atractaspididae (atractaspidids) are a family of venomous snakes found in Africa and the Middle East, commonly called mole vipers, stiletto snakes, or burrowing asps. Currently, 12 genera are recognized.
Boiga dendrophila, commonly called the mangrove snake or the gold-ringed cat snake, is a species of rear-fanged venomous snake in the family Colubridae. The species is endemic to southeast Asia. It is one of the biggest cat snake species, averaging 8–9 feet in length. It is considered mildly venomous. Although moderate envenomations resulting in intense swelling have been reported, there has never been a confirmed fatality.
Beddome's coral snake is a species of venomous snake in the family Elapidae. The species is endemic to hills of peninsular India.
Sinomicrurus macclellandi, commonly known as MacClelland's coral snake, is a species of venomous snake in the family Elapidae. The species is endemic to southern and eastern Asia.
Calliophis melanurus, commonly known as the slender coral snake, is a species of venomous elapid snake endemic to the Indian subcontinent. Two subspecies are recognized, including the nominotypical subspecies.
Calliophis nigriscens, commonly known as the black coral snake or striped coral snake, is a species of venomous elapid snake endemic to the Western Ghats, India.
Calliophis bibroni, commonly known as Bibron's coral snake, is a species of venomous snake in the family Elapidae. The species is native to India.
Venomous snakes are species of the suborder Serpentes that are capable of producing venom, which they use for killing prey, for defense, and to assist with digestion of their prey. The venom is typically delivered by injection using hollow or grooved fangs, although some venomous snakes lack well-developed fangs. Common venomous snakes include the families Elapidae, Viperidae, Atractaspididae, and some of the Colubridae. The toxicity of venom is mainly indicated by murine LD50, while multiple factors are considered to judge the potential danger to humans. Other important factors for risk assessment include the likelihood that a snake will bite, the quantity of venom delivered with the bite, the efficiency of the delivery mechanism, and the location of a bite on the body of the victim. Snake venom may have both neurotoxic and hemotoxic properties. There are about 600 venomous snake species in the world.
Bungarus candidus, commonly known as the Malayan krait or blue krait, is a highly venomous species of snake. The blue krait is a member of the genus Bungarus and the family Elapidae.
The red-headed krait is a large highly venomous elapid snake with dramatic coloration. The red-headed krait can grow to a length of up to 2.1 metres (7 ft). It lives in lowland rain forest, including those on islands, but it is considered uncommon. It feeds primarily on specific snakes, probably semiaquatic and fossorial snakes. In Southeast Asia, the red-headed krait occurs in Malaysia, Singapore, Thailand, South India and Indonesia (Sumatra), with a subspecies in Borneo. The venom potency is little-studied, as bites from this species are extremely rare.
Calliophis intestinalis, commonly known as the banded Malayan coral snake, is a species of venomous elapid snake endemic to Southeast Asia.
Calamaria schlegeli is a species of snake in the family Colubridae. The species is known commonly as the red-headed reed snake, white-headed reed snake, and pink-headed reed snake. It is native to Southeast Asia, where it occurs in Brunei, Indonesia, Malaysia, and Singapore.
Venom in snakes and some lizards is a form of saliva that has been modified into venom over its evolutionary history. In snakes, venom has evolved to kill or subdue prey, as well as to perform other diet-related functions. While snakes occasionally use their venom in self defense, this is not believed to have had a strong effect on venom evolution. The evolution of venom is thought to be responsible for the enormous expansion of snakes across the globe.
Sinomicrurus sauteri is a species of highly venomous coral snake in the family Elapidae. The species is endemic to Taiwan and known from southern and central Taiwan at elevations of 500–1,500 m (1,600–4,900 ft) above sea level.
Calliophis salitan is a species of venomous snake in the family Elapidae. It is endemic to the Philippines and known from Dinagat Island and Mindanao; the former is based on a small number of recent records whereas the latter is based on a museum specimen from 1887.
