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Natricinae
The Natricinae are a subfamily of colubroid snakes, sometimes referred to as a family (Natricidae). The subfamily comprises 36 genera. Members include many very common snake species, such as the European grass snakes, and the North American water snakes and garter snakes. Some Old World members of the subfamily are known as keelbacks, because their dorsal scales exhibit strong keeling. Natricine snakes are found in Africa, Asia, Europe, North America, and Central America as far south as Costa Rica. A single species, '' Tropidonophis mairii'', reaches Australia. Although the highest diversity is in North America, the oldest members are in Asia and Africa, suggesting an Old World origin for the group. Most species are semiaquatic and feed on fish and amphibians, although a few are semifossorial or leaf-litter snakes that feed on invertebrates. Most species are harmless to humans, but a few (e.g., '' Thamnophis sirtalis'', '' Thamnophis elegans'') are capable of inflicting bit ... [...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] |
Tropidonophis Mairii
''Tropidonophis mairii'', also known commonly as Mair's keelback,. www.reptile-database.org. the common keelback, and the freshwater snake, is a species of colubrid snake in the subfamily Natricinae. The species is native to Australasia. Etymology The specific name, ''mairii'', is in honor of "Dr. Mair", an army surgeon with the 39th Regiment of Foot, who collected the holotype. Geographic range ''Tropidonophis mairii'' is found in Australia, Indonesia, New Guinea, and Papua New Guinea. Habitat The preferred natural habitats of ''Tropidonophis mairii'' are forest, grassland, and freshwater wetlands, at altitudes from sea level to . Description Dorsally, ''Tropidonophis mairii'' is olive, brown, or blackish, with small black spots, or with black crossbars anteriorly. Ventrally, it is lighter. The subcaudals and often also the ventrals are edged with black. The dorsal scales are strongly keeled, and arranged in 15 rows at midbody. It resembles the Australian venomous rough-sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipsadinae
Dipsadinae is a large subfamily of colubroid snakes, sometimes referred to as a family (Dipsadidae). Species of the subfamily Dipsadinae are found in most of the Americas, including the West Indies, and are most diverse in South America. There are more than 700 member species. Dipsadinae are an ecologically and morphologically diverse group of mostly small to moderate-sized snakes, typically less than in total length. Some are arboreal, but others are aquatic or terrestrial and may even burrow. Most are oviparous. Many eat frogs or lizards, and some consume mammals and birds. Several genera (e.g. '' Adelphicos'', '' Atractus'', '' Geophis'', '' Dipsas'', '' Ninia'', '' Sibon'', '' Sibynomorphus'', '' Tropidodipsas'') are specialized feeders on gooey and slimy prey, such as frog eggs, earthworms, snails, and slugs. Almost all species are completely harmless to humans, although a few genera (e.g. '' Borikenophis'', '' Cubophis'', '' Heterodon'', '' Hydrodynastes'', ''Philodryas'') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dice Snake
The dice snake (''Natrix tessellata'') or water snake is a Eurasian nonvenomous snake in the family Colubridae, subfamily Natricinae. Its average length is . Body color may vary from greyish green to brownish or almost black, with dark spots on the back. The belly is sometimes vividly coloured in yellow or orange, with black spots, very similar to dice, hence the name. Ecology Living mainly near rivers, streams and lakes, it frequently feeds on fish. Sometimes, it feeds also on amphibians such as frogs, toads, and tadpoles. In one instance, a dice snake was even observed trying to feed on an olm (''Proteus anguinus'') that had been flushed from a cave in Bosnia and Herzegovina following heavy rains. However, the snake was far too small to be able to consume the olm. While considered nonvenomous, ''N. tessellata'' produces a potent antihemorrhagin in its serum. As a defence, it spreads a very bad-smelling secretion from its cloaca. Another defence mechanism is thanatosis, pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhabdophis Subminiatus
''Rhabdophis subminiatus'', commonly called the red-necked keelback or red-necked keelback snake, is a species of 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 ... in the subfamily Natricinae of the Family (biology), family Colubridae. The species is Endemism, endemic to Asia. Unusual for colubrids, it is also poisonous. This snake is found mostly in terai and sivalik region in Nepal and locally called Deule tiris. Description ''Rhabdophis subminiatus'' has a greenish hue with red and yellow regions near the head. It grows to in total length (including tail). Female is much larger than male. During mating, multiple males may swarm a single female. Habitat and diet The red-necked keelback generally lives near ponds, where it consumes frogs, fish, lizards and sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhabdophis Tigrinus
''Rhabdophis tigrinus'', also known Common name, commonly as the tiger keelback, ''yamakagashi'', or ''kkotbaem'', is a species of venomous snake in the subfamily Natricinae of the Family (biology), family Colubridae. The species is native to East Asia and Southeast Asia. Many sources, though not ITIS, recognize one subspecies, ''Rhabdophis tigrinus formosanus'' of Taiwan. Description The Dorsum (anatomy), dorsal color pattern of ''R. tigrinus'' is olive-drab green, with black and bright orange crossbars or spots from the neck down the first third of the body. The belly is whitish. The average total length (including tail) is usually .''Rhabdophis tigrinus lateralis'' a Animal Pictures Archiv ... [...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] |
Thamnophis Elegans
The western terrestrial garter snake (''Thamnophis elegans'') is a western North American species of colubrid snake. At least five subspecies are recognized. Description Most western terrestrial garter snakes have a yellow, light orange, or white dorsal stripe, accompanied by two stripes of the same color, one on each side. Some varieties have red or black spots between the dorsal stripe and the side stripes. It is an immensely variable species, and even the most experienced herpetologists have trouble with its identification. They are medium-sized snakes, usually . Like many species of North American garter snake, the western terrestrial garter snake possesses a mildly venomous saliva. Specimens collected from Idaho and Washington produced venom with myonecrotic (muscle tissue-killing) effects when injected into the gastrocnemius muscles of mice. Several cases of mild human envenomation with local edema and other symptoms (but without any systemic symptoms) have occurred from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudoxenodontinae
Pseudoxenodontinae is a small subfamily of colubroid snakes, sometimes referred to as a family (Pseudoxenodontidae). They are found in southern and southeastern Asia, from northeast India to southern China (including Taiwan) and south into Indonesia as far east as Wallace's Line. There are 10 species in 2 genera. Most are very poorly known, such that Pseudoxenodontinae is one of the most poorly known groups of snakes. Pseudoxenodontine snakes are small to medium-sized egg-laying snakes. Shared features of the hemipenes between ''Pseudoxenodon'' and ''Plagiopholis'' first described in 1987, were later backed up by evidence from DNA in the early-2010s. There are many differences between the two genera. ''Pseudoxenodon'' seem to be found along streams in wet forests, whereas ''Plagiopholis'' are apparently found in grasses, bushes, and riprap. ''Pseudoxenodon'' eat frogs and lizards and ''Plagiopholis'' eat earthworms. ''Plagiopholis'' (20 to 40 cm total length) are smaller t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nerodia
''Nerodia'' is a genus of nonvenomous colubrid snakes commonly referred to as water snakes due to their aquatic behavior. The genus includes nine species, all native to North America. Five of the species have recognized subspecies. Description ''Nerodia'' species vary greatly, but all are relatively heavy-bodied snakes, sometimes growing to 1.2 m (4 feet) or longer in total length (including tail). They have flattened heads, with small eyes that have round pupils, and keeled dorsal scales. Species like '' N. fasciata'' display distinct banding, whereas other species, like '' N. erythrogaster'', have blotching, and those like '' N. rhombifer'' have diamond-shaped patterning. Most species are brown or olive green, or some combination thereof with markings being brown, or black. Yellow or cream-colored accenting is common. Behavior As the common name water snakes implies, species in the genus ''Nerodia'' are largely aquatic. They spend the vast majority of their time in or very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibian
Amphibians are ectothermic, anamniote, anamniotic, tetrapod, four-limbed vertebrate animals that constitute the class (biology), class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all Tetrapod, tetrapods, but excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds and mammals). All extant taxon, extant (living) amphibians belong to the monophyletic subclass (biology), subclass Lissamphibia, with three living order (biology), orders: Anura (frogs and toads), Urodela (salamanders), and Gymnophiona (caecilians). Evolved to be mostly semiaquatic, amphibians have adapted to inhabit a wide variety of habitats, with most species living in freshwater ecosystem, freshwater, wetland or terrestrial ecosystems (such as riparian woodland, fossorial and even arboreal habitats). Their biological life cycle, life cycle typically starts out as aquatic animal, aquatic larvae with gills known as tadpoles, but some species have devel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subfamily
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zoological subfamily names with "-inae". Detarioideae is an example of a botanical subfamily. Detarioideae is a subdivision of the family Fabaceae (legumes), containing 84 genera. Stevardiinae is an example of a zoological subfamily. Stevardiinae is a large subdivision of the family Characidae, a diverse 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 t ... of freshwater fish. See also * International Code of Nomenclature for algae, fungi, and plants * International Code of Zoological Nomenclature * Rank (botany) * Rank (zoolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
