Difference between revisions of "Snake Taxonomy"
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[[Image:Lizard_taxa.JPG|thumb|right|400px]] | [[Image:Lizard_taxa.JPG|thumb|right|400px]] | ||
==Introduction== | ==Introduction== | ||
| − | [[Snake|Snakes]] are the most recently evolved group of reptiles and have numerous specialisations that distinguish them from other squamates (scaled reptiles). Their [[Snake Musculoskeletal System|musculoskeletal system]] is adapted for creeping, burrowing, swimming and gliding. [[Snake Special Senses|Chemo and thermoreceptors]] are a key feature in their methods of predation, in addition to extreme cranial kinesis and, in some species, [[Snake Handling and Restraint|deadly venoms]]. | + | [[Snake|Snakes]] are the most recently evolved group of [[Reptiles|reptiles]] and have numerous specialisations that distinguish them from other squamates (scaled reptiles). Their [[Snake Musculoskeletal System|musculoskeletal system]] is adapted for creeping, burrowing, swimming and gliding. [[Snake Special Senses|Chemo and thermoreceptors]] are a key feature in their methods of predation, in addition to extreme cranial kinesis and, in some species, [[Snake Handling and Restraint|deadly venoms]]. |
* Find out more about [[Snake Locomotion|snake locomotion]]. | * Find out more about [[Snake Locomotion|snake locomotion]]. | ||
==Evolution and Taxonomy== | ==Evolution and Taxonomy== | ||
| − | Snakes are members of the class Reptilia and order Squamata (scaled reptiles). Squamata is made up of the suborders Serpentes ([[Snake|snakes]]) and Sauria ([[Lizard|lizards]]). Snakes are the most recently evolved group of reptiles. Their fossil record is limited due to their fragile [[Snake Musculoskeletal System|skeletons]], however recent discoveries of early fossil snakes with posterior legs has generated debate about the origins of their evolution. | + | Snakes are members of the class Reptilia and order Squamata (scaled reptiles). Squamata is made up of the suborders Serpentes ([[Snake|snakes]]) and Sauria ([[Lizard|lizards]]). Snakes are the most recently evolved group of [[Reptiles|reptiles]]. Their fossil record is limited due to their fragile [[Snake Musculoskeletal System|skeletons]], however recent discoveries of early fossil snakes with posterior legs has generated debate about the origins of their evolution. |
[[Image:Royalpython.jpg|thumb|right|300px|'''Royal python, ''Python regius''''' Photo credit: Claire Porteous]] | [[Image:Royalpython.jpg|thumb|right|300px|'''Royal python, ''Python regius''''' Photo credit: Claire Porteous]] | ||
==Common Species== | ==Common Species== | ||
Snakes commonly presented in practice are non-venomous and come from two diverse families - [[Colubridae]] and [[Boidae]]. | Snakes commonly presented in practice are non-venomous and come from two diverse families - [[Colubridae]] and [[Boidae]]. | ||
| − | [[Colubridae|Colubrids]] are the largest family of snakes. Common examples include [[Milk snake|milk snakes]], [[Kingsnake|kingsnakes]], [[Rat snake|rat snakes]], [[Corn Snake|corn snakes]] and [[Garter Snake|garter snakes]]. All are rodent eaters in captivity and oviparous except for [[Garter Snake|garter snakes]] that eat fish and invertebrates and are viviparous. | + | [[Colubridae|Colubrids]] are the largest family of snakes. Common examples include [[Milk snake|milk snakes]], [[Kingsnake|kingsnakes]], [[Rat snake|rat snakes]], [[Corn Snake|corn snakes]] and [[Garter Snake|garter snakes]]. All are rodent eaters in captivity and [[Oviparous|oviparous]] except for [[Garter Snake|garter snakes]] that eat fish and invertebrates and are viviparous. |
| − | * Find out more about captive snake [[Snake Feeding|feeding]] and [[Snake Diet|specialised diets]]. | + | * '''Find out more about captive snake''' [[Snake Feeding|feeding]] '''and''' [[Snake Diet|specialised diets]]. |
| − | [[Boidae|Boids]] include boas and pythons. Boas are viviparous and have single, undivided subcaudal scales. Pythons are oviparous and generally have divided subcaudal scales. Common pets include [[Boa constrictor|boa constrictors]], [[Royal Python|royal pythons]] (known as ball pythons in North America) and [[Burmese Python|Burmese pythons]]. | + | [[Boidae|Boids]] include boas and pythons. Boas are viviparous and have single, undivided subcaudal [[Snake Skin|scales]]. Pythons are oviparous and generally have divided subcaudal scales. Common pets include [[Boa constrictor|boa constrictors]], [[Royal Python|royal pythons]] (known as ball pythons in North America) and [[Burmese Python|Burmese pythons]]. |
==Identification of Common Species== | ==Identification of Common Species== | ||
Identification can be difficult, given the range of species. However, these are the most common snakes you are likely to see in practice. | Identification can be difficult, given the range of species. However, these are the most common snakes you are likely to see in practice. | ||
Revision as of 15:02, 10 May 2010
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Introduction
Snakes are the most recently evolved group of reptiles and have numerous specialisations that distinguish them from other squamates (scaled reptiles). Their musculoskeletal system is adapted for creeping, burrowing, swimming and gliding. Chemo and thermoreceptors are a key feature in their methods of predation, in addition to extreme cranial kinesis and, in some species, deadly venoms.
- Find out more about snake locomotion.
Evolution and Taxonomy
Snakes are members of the class Reptilia and order Squamata (scaled reptiles). Squamata is made up of the suborders Serpentes (snakes) and Sauria (lizards). Snakes are the most recently evolved group of reptiles. Their fossil record is limited due to their fragile skeletons, however recent discoveries of early fossil snakes with posterior legs has generated debate about the origins of their evolution.
Common Species
Snakes commonly presented in practice are non-venomous and come from two diverse families - Colubridae and Boidae.
Colubrids are the largest family of snakes. Common examples include milk snakes, kingsnakes, rat snakes, corn snakes and garter snakes. All are rodent eaters in captivity and oviparous except for garter snakes that eat fish and invertebrates and are viviparous.
- Find out more about captive snake feeding and specialised diets.
Boids include boas and pythons. Boas are viviparous and have single, undivided subcaudal scales. Pythons are oviparous and generally have divided subcaudal scales. Common pets include boa constrictors, royal pythons (known as ball pythons in North America) and Burmese pythons.
Identification of Common Species
Identification can be difficult, given the range of species. However, these are the most common snakes you are likely to see in practice.
| Family | Genera | ||
|---|---|---|---|
| Primitive Snakes | |||
| Anomalepididae | Blind snakes | 4 | |
| Infraorder | Typhlopidae | Blind worm snakes | 3 |
| Scolecophidia | Leptotyphlopidae | Slender blind snakes | 2 |
| Advanced Snakes | |||
| Infraorder | Acrochordidae | File snakes | 1 |
| Alethinophidia | Aniliidae | Coral pipe snakes | 1 |
| Atractaspididae | Mole vipers | 1 | |
| Boidae | Boas and pythons | 23 | |
| Bolyeriidae | Round Island ‘boas’ | 2 | |
| Colubridae | Advanced snakes | 303 | |
| Elapidae | Cobras, kraits and sea snakes | 60 | |
| Loxocemidae | Mexican burrowing pythons | 1 | |
| Uropeltidae | Short-tail snakes | 10 | |
| Viperidae | Vipers | 28 | |
| Xenopeltidae | Sunbeam snake | 1 |