Microcephalophis | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Serpentes |
Family: | Elapidae |
Genus: | Microcephalophis Lesson, 1832 |
Species: | M. gracilis |
Binomial name | |
Microcephalophis gracilis (Shaw, 1802) | |
Synonyms | |
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Microcephalophis gracilis, also known as the graceful small-headed seasnake, slender sea snake, narrow-headed sea snake, common small-headed sea snake, is a species of sea snake found in the Indian and Pacific Oceans. [1] [2] [3] It is venomous. [2] [3]
Head small, body long and slender anteriorly; scales on thickest part of body juxtaposed; 5–6 maxillary teeth behind fangs; 17–21 scale rows around neck, 30–36 around thickest part of body (increase from neck to midbody 18–24); ventrals divided by a longitudinal fissure; prefrontal in contact with third upper labial; ventrals 220–287. [2] [4]
Total length males 950 mm, females 1025 mm; tail length males 80 mm, females 95 mm. [2] [4]
Microcephalophis gracilis is found on the coasts of the Indian Ocean and West Pacific, from around the Persian Gulf (Bahrain, Qatar, Saudi Arabia, Oman, United Arab Emirates (UAE), Iran, Iraq and Kuwait) to Pakistan, India, Sri Lanka, Bangladesh, Myanmar, Thailand, and Indonesia, and into the Malay Archipelago/West Pacific in Thailand, Malaysia, Singapore, Cambodia, Vietnam, the Philippines, southern China, Hong Kong, and Taiwan, as well as in Australia (Queensland) and Papua New Guinea. [1] [4]
The venom of this species is dangerous and can be fatal. The symptoms generally began to appear within 30 minutes after being bitten. The bite typically does not cause any pain. Muscles get affected once the venom starts to act causing paralysis which is one of the major characteristics of its bite. Victim may also experience headache, thirst and sweating after the bite.
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 varying proportions. The family includes 55 genera with around 360 species and over 170 subspecies.
The olive-headed sea snake, also known as the greater sea snake, is a species of venomous sea snake in the family Elapidae.
Hydrophis schistosus, commonly known as the beaked sea snake, hook-nosed sea snake, common sea snake, or the Valakadeyan sea snake, is a highly venomous species of sea snake common throughout the tropical Indo-Pacific. This species is implicated in more than 50% of all bites caused by sea snakes, as well as the majority of envenomings and fatalities.
Hydrophis belcheri, commonly known as the faint-banded sea snake or Belcher's sea snake, is an extremely venomous species of sea snake. It has a timid temperament and would normally have to be subjected to severe mistreatment before biting. Usually those bitten are fishermen handling nets, although only one-quarter of those bitten are envenomated since the snake rarely injects much of its venom. Although not much is known about the venom of this species, its LD50 toxicity in mice has been determined to be 0.24 mg/kg when delivered intramuscularly.
Hydrophis caerulescens, commonly known as the dwarf sea snake, is a species of venomous sea snake in the family Elapidae.
Hydrophis cyanocinctus, commonly called the annulated sea snake or the blue-banded sea snake, is a species of venomous sea snake in the family Elapidae.
Hydrophis fasciatus, commonly known as the striped sea snake, is a species of venomous sea snake in the family Elapidae (Hydrophiinae).
Hydrophis klossi, also commonly known as Kloss's sea snake or Kloss' sea snake, is a species of sea snake in the family Elapidae. Like all other sea snakes, it is venomous. The species is endemic to the Indian Ocean.
Hydrophis melanocephalus, commonly known as the slender-necked sea snake, is a species of venomous sea snake in the family Elapidae.
Hydrophis spiralis, commonly known as the yellow sea snake, is a species of venomous sea snake in the family Elapidae.
Hydrophis stricticollis, commonly called the collared sea snake, is a species of venomous sea snake in the family Elapidae.
Hydrophis curtus, also known as Shaw's Sea Snake, short sea snake, but often includes Hydrophis hardwickii is a species of sea snake. Like most Hydrophiinae sea snakes, it is a viviparous, fully marine, and front fanged elapid that is highly venomous. It is collected for a variety of purposes including human and animal food, for medicinal purposes and for their skin.
The spine-bellied sea snake, also commonly known as Hardwicke's sea snake and Hardwicke's spine-bellied sea snake, is a species of venomous sea snake in the family Elapidae. The species is native to the Indian Ocean and the western Pacific Ocean.
The yellow-lipped sea krait, also known as the banded sea krait or colubrine sea krait, is a species of highly venomous snake found in tropical Indo-Pacific oceanic waters. The snake has distinctive black stripes and a yellow snout, with a paddle-like tail for use in swimming.
Hydrophis cantoris, also known commonly as Cantor's narrow-headed sea snake and Cantor's small-headed sea snake, is a species of venomous sea snake in the family Elapidae.
Hydrophis viperinus, commonly known as the viperine sea snake, is a species of venomous sea snake in the family Elapidae (Hydrophiinae).
Sea snakes, or coral reef snakes, are elapid snakes that inhabit marine environments for most or all of their lives. They belong to two subfamilies, Hydrophiinae and Laticaudinae. Hydrophiinae also includes Australasian terrestrial snakes, whereas Laticaudinae only includes the sea kraits (Laticauda), of which three species are found exclusively in freshwater. If these three freshwater species are excluded, there are 69 species of sea snakes divided among seven genera.
Hydrophis peronii, commonly known as the horned sea snake, Peron's sea snake, and the spiny-headed seasnake, is a species of venomous snake in the subfamily Hydrophiinae of the family Elapidae. The species is endemic to the western tropical Pacific Ocean. It is the only sea snake with spines on the head. It is sometimes placed in its own genus Acalyptophis.
The yellow-bellied sea snake is a venomous species of snake from the subfamily Hydrophiinae found in tropical oceanic waters around the world except for the Atlantic Ocean. For many years, it was placed in the monotypic genus Pelamis, but recent molecular evidence indicates it lies within the genus Hydrophis.
Bungarus magnimaculatus, also known commonly as the Burmese krait, the spotted krait and the splendid krait, is a species of venomous snake in the family Elapidae. The species is endemic to Myanmar.