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Colubrid
Colubridae (, commonly known as colubrids , from , 'snake') is a family of snakes. With 249 genera, it is the largest snake family. The earliest fossil species of the family date back to the Late Eocene epoch, with earlier origins suspected. Colubrid snakes are found on every continent except Antarctica. Description Colubrids are a very diverse group of snakes. They can exhibit many different body styles, body sizes, colors, and patterns. They can also live in many different types of habitats including aquatic, terrestrial, semi-arboreal, arboreal, desert, mountainous forests, semi-fossorial, and brackish waters. A primarily shy and harmless group of snakes, the vast majority of colubrids are not venomous, nor do most colubrids produce venom that is medically significant to mammals. However, the bites of some can escalate quickly to emergency situations. Furthermore, within the Colubridae, the South African boomslang and twig snakes, as well as the Asian keelback snakes ('' R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boomslang
The boomslang ( or ; ''Dispholidus typus'') is a highly venomous snake in the family Colubridae. The species is native to Sub-Saharan Africa. Etymology Its common name means "tree snake" in Dutch and Afrikaans – ''boom'' meaning "tree", and ''slang'' meaning "snake". In Afrikaans, the name is pronounced . Taxonomy The boomslang is a colubrid snake within the subfamily Colubrinae. It belongs to the genus ''Dispholidus'', which contains two other species, '' D. pembae'' and '' D. punctatus''. The boomslang is thought to be closely related to members of the genera '' Thelotornis'', '' Thrasops'', '' Rhamnophis'', and '' Xyelodontophis'', with which it forms the taxonomic tribe Dispholidini. Close relationships can be shown in the cladogram below: Subspecies Two subspecies are recognised, including the nominotypical subspecies. * ''D. t. kivuensis'' * ''D. t. typus'' The trinomial authority in parentheses for ''D. t. typus'' indicates that the subspecies wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Rat Snake (Grey And Yellow)
''Ptyas mucosa'', commonly known as the Oriental rat snake, dhaman or Indian rat snake, is a common non-venomous species of colubrid snake found in parts of South and Southeast Asia. Dhamans are large snakes. Typical mature total length is around though some exceed . The record length for this species was , second only to their cousin ''Ptyas carinata'' among living colubrid snakes.Auliya, M. (2010). ''Conservation Status and Impact of Trade on the Oriental Rat Snake Ptyas mucosa in Java, Indonesia''. TRAFFIC Southeast Asia. Despite their large size, oriental ratsnakes are usually quite slender with even a specimen of commonly measuring only around in diameter. Furthermore, the average weight of ratsnakes caught in Java was around , though larger males of over (which average mildly larger of the two sexes in the species) may easily weigh over . Their color varies from pale browns in dry regions to nearly black in moist forest areas. Rat snakes are diurnal, semi-arboreal, non-v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Venomous Snake
''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 , 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. Evolution The evolutionary history of venomous snakes can be traced back ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colubrinae
The Colubrinae are a subfamily of snakes within the family Colubridae. It includes numerous genus, genera, and although Taxonomy (biology), taxonomic sources often disagree on the exact number, the Reptile Database lists 717 species in 92 genera as of September 2019. It is the second largest subfamily of colubrids, after Dipsadinae. Many of the most commonly known snakes are members of this subfamily, including rat snakes, king snakes, milk snakes, vine snake (other), vine snakes, and indigo snakes. Distribution Colubrine snakes are distributed worldwide, with the highest diversity in North America, Asia, northern Africa, and the Middle East. There are relatively few species of colubrine snakes in Europe, South America, Australia, and southern Africa, and none in Madagascar, the Caribbean, or the Pacific Islands. Description Colubrine snakes are extremely Morphology (biology), morphologically and ecologically diverse. Many are terrestrial, and there are specialized foss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snake
Snakes are elongated limbless reptiles of the suborder Serpentes (). Cladistically squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales much like other members of the group. Many species of snakes have skulls with several more joints than their lizard ancestors and relatives, enabling them to swallow prey much larger than their heads ( cranial kinesis). To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most only have one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca. Lizards have independently evolved elongate bodies without limbs or with greatly reduced limbs at least twenty-five times via convergent evolution, leading to many lineages of legless lizards. These resemble snakes, but several common groups of legless lizards have eyelids and external ears, which snakes lack, althoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elapidae
Elapidae (, commonly known as elapids , from , variant of "sea-fish") 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 white-lipped snake to the 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. Description Terrestrial elapids look similar to the Colubridae; almost all have long, slender bodies with smooth scales, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sibynophis
''Sibynophis'' is a genus of nonvenomous colubrid snakes, commonly called many-toothed snakes, which together with '' Scaphiodontophis'' make up the subfamily Sibynophiinae. Species The following nine species are recognized.Wikispecies * '' Sibynophis bistrigatus'' ( Günther, 1868) – Günther's many-toothed snake * '' Sibynophis bivittatus'' ( Boulenger, 1894) – white-striped snake * '' Sibynophis chinensis'' ( Günther, 1889) – Chinese many-toothed snake * '' Sibynophis collaris'' (Gray, 1853) – common many-toothed snake * '' Sibynophis geminatus'' ( H. Boie, 1826) – Boie's many-toothed snake * '' Sibynophis melanocephalus'' (Gray, 1835) – black-headed collared snake, Malayan many-toothed snake * '' Sibynophis sagittarius'' (Cantor, 1839) – Cantor's black-headed snake * ''Sibynophis subpunctatus'' ( A.M.C. Duméril, Bibron & A. Duméril, 1854) – Duméril's black-headed snake, Jerdon's many-toothed snake * '' Sibynophis triangularis'' Taylor Taylor, Taylors or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colubroidea
Colubroidea is a superfamily of snakes in the clade Colubroides that includes Colubridae, with some studies splitting Colubridae into multiple families that make up Colubroidea. Historically, Colubroidea also included other caenophidian snakes such as cobras and vipers, as these snakes form a clade. However these groups are now divided into several distinct, but related, families. Zaher et al. (2009) proposed to redefine Colubroidea for colubrids and related families, while designating Colubroides as the group containing vipers and cobras as well as colubroids. The ReptileDatabase considers Colubroidea to be composed of Colubridae and the members of its sister group, Elapoidea, and does not recognize the division of Colubridae into multiple families. Classification Phylogeny Families and Subfamilies Usual taxonomy: * Family: Colubridae Nicolaus Michael Oppel, Oppel, 1811 ** Subfamily: Grayiinae Günther, 1858 ** Subfamily: Calamariinae Bonaparte, 1838 ** Subfamily: Ahaetullina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Twig Snake
The twig snakes (genus ''Thelotornis''), also commonly known as bird snakes or vine snakes, are a genus of Opisthoglyphous, rear-fanged venomous snakes in the Family (biology), family Colubridae. The genus is native to Africa. All species in the genus have a slender and elongated profile, a long tail, a narrow head and a pointed snout. The eye of all species has a horizontal pupil, shaped like a keyhole, which gives twig snakes binocular vision. Twig snakes are greyish-brown with faint light and dark markings. When threatened, they inflate the throat to display bold black markings between the Snake scales, scales. Twig snake bites are potentially deadly: the venom is hemotoxin, hemotoxic, affecting the blood clotting mechanism and causing uncontrolled bleeding and internal hemorrhaging. Bites by twig snakes have caused death in humans; famous herpetologist Robert Mertens died after being bitten by his pet savanna vine snake (''Thelotornis capensis''). However, envenomed bites are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhabdophis
''Rhabdophis'' is a genus of snakes in the subfamily Natricinae of the family Colubridae. Species in the genus ''Rhabdophis'' are generally called keelback snakes, and are found primarily in Southeast Asia. The best-known species is '' Rhabdophis tigrinus''; few other species have been studied in detail. Toxicity Colubrid snakes are often thought of as completely harmless, but there are a handful of notable exceptions, including some species of ''Rhabdophis''. Bites from both ''Rhabdophis tigrinus'' and ''Rhabdophis subminiatus'' have caused cases of severe envenomation. There are several reports of fatal bites from ''R. tigrinus''. Between 1971 and 2020, 5 of 43 ''R. tigrinus'' bites in Japan were fatal, all of which occurred in cases not treated with antivenom. Antivenom is manufactured by the Japan Snake Institute and is an effective treatment for ''R. tigrinus'' bites, but is an unapproved drug. The venom is highly hemorrhagic. While the term "poisonous snake" is often inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colubroelaps
Nguyenvansang's snake (''Colubroelaps nguyenvansangi'' ) is a species of snake in the family Colubridae. The species is endemic to Vietnam. Etymology The specific name, ''nguyenvansangi'', is in honor of Vietnamese herpetologist Nguyen Van Sang.Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . (''Colubroelaps nguyenvansangi'', p. 190). Taxonomy As of 2019, the genus ''Colubroelaps'' is monotypic, containing the sole species ''C. nguyenvansangi''. Geographic range ''C. nguyenvansangi'' is found in southern Vietnam, in Bình Phước Province and Lâm Đồng Province.. www.reptile-database.org. Description ''C. nguyenvansangi'' may attain a total length of , which includes a tail about long. The head is small, roundish, and short, and is not distinct from the body. The body is very slender. The dorsal scales are in 15 rows at midbody. Dorsally Standard anatomical terms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade
In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach to taxonomy adopted by most biological fields. The common ancestor may be an individual, a population, or a species (extinct or Extant taxon, extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed ''monophyletic'' (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming Taxon, taxa that are not clades; that is, taxa that are not Monophyly, monophyletic. Some of the relationships between organisms that the molecul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
