name = Boidae
image_caption = Boa constrictor, "Boa constrictor"
familia = Boidae
familia_authority = Gray, 1825
synonyms = * "Boidae" - Gray, 1825McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).]
:"Common names: boas, boids.ITIS|ID=174321|taxon=Boidae|year=2008|date=14 July] "The Boidae are a family of non-venomous
snakes found in the Americas, Africa, Europe, Asiaand some Pacific Islands. Relatively primitive snakes, adults are medium to large in size, with females usually larger than the males. The name is derived from the Latin term "bos", meaning "cow", and is based on an old myth that boas pursue cows and suckle them until they are drained to death. Two subfamilies comprising eight genera and 43 speciesare currently recognized.
Like the pythons, boids have elongated supratemporal bones. The quadrate bones are also elongated, but not as much, while both are capable of moving freely so that when they swing sideways to their maximum extent, the distance between the hinges of the lower jaw is greatly increased.Parker HW, Grandison AGC. 1977. Snakes -- a natural history. Second Edition. British Museum (Natural History) and Cornell University Press. 108 pp. 16 plates. LCCCN 76-54625. ISBN 0-8014-1095-9 (cloth), ISBN 0-8014-9164-9 (paper).]
Both families share a number of primitive characteristics. Nearly all have a relatively rigid lower jaw with a coronoid element, as well as a vestigial pelvic girdle with hind limbs that are partially visible as a pair of spurs, one on either side of the vent. In males, these
anal spursare larger and more conspicuous than in females. A long row of palatal teeth is present and most species have a functional left lung that can be up to 75% as large as the right lung. [http://www.curator.org/legacyvmnh/weboflife/kingdom/P_Chordata/ClassReptilia/O_Squamata/InfraSnakes/FBoidae/boidae.htm Boidae] at [http://www.curator.org/ VMNH] . Accessed 15 July 2008.]
Boids are, however, distinguished from the pythons in that none have postfrontal bones or premaxillary teeth, and that they give birth to live young. When labial pits are present, these are located between the scales as opposed to on them. Also, their geographical distributions are almost entirely mutually exclusive. In the few areas that they do coexist, the tendency is for them to occupy different habitats.
It used to be said that boas are found in the
New Worldand pythons in the Old World, but with boid species found on Madagascar, Fijiand the Solomon Islands, this is not quite true. Instead, it seems that they have survived in evolutionarily isolated areas. After all, South Americahad, until a few million years ago, a distinct faunathat included marsupialand mammals. With the land bridge to North America, boids have migrated north as placentalmammals and colubrids have migrated south.
The Old Tupi name for such snakes was "mbói", which figures in the
etymologyof names like "jibóia" and "boitatá" (the Brazilian name for the mythical Giant anaconda).
Found in Northern, Central and
South America, the Caribbean, southeastern Europeand Asia Minor, Northern, Central and East Africa, Madagascarand Reunion Island, the Arabian Peninsula, Central and southwestern Asia, Indiaand Sri Lanka, the Moluccasand New Guineathrough to Melanesiaand Samoa.
Prey is killed by a process known as "
constriction"; after an animal has been grasped to restrain it, a number of coils are hastily wrapped around it. Then, by applying and maintaining sufficient pressure to prevent it from inhaling, the prey eventually succumbs due to asphyxiation. It has recently been suggested that the pressures produced during constriction cause cardiac arrest by interfering with blood flow, but this hypothesis has not yet been confirmed.
Larger specimens usually eat animals about the size of a house cat, but larger food items are not unknown: the diet of the common anaconda, "
Eunectes murinus", is known to include subadult tapirs. Prey is swallowed whole, and may take anywhere from several days or even weeks to fully digest. Despite their intimidating size and muscular power, they are generally not dangerous to humans.
Contrary to popular belief, even the larger species do not crush their prey to death; in fact, prey is not even noticeably deformed before it is swallowed. The speed with which the coils are applied is impressive and the force they exert may be significant, but death is caused by suffocation, with the victim not being able to move its ribs in order to breathe while it is being constricted.Mehrtens JM. 1987. Living Snakes of the World in Color. New York: Sterling Publishers. 480 pp. ISBN 0-8069-6460-X.] Stidworthy J. 1974. Snakes of the World. Grosset & Dunlap Inc. 160 pp. ISBN 0-448-11856-4.] Carr A. 1963. The Reptiles. Life Nature Library. Time-Life Books, New York. 192 pp. LCCCN 63-12781.]
Type genus= "Boa" - Gray, 1825
Pythons are sometimes classified as a subfamily of Boidae, the Pythoninae, but are in this case listed under their own family, the
Pythonidae. In the same way, the Old World sand boas, the Erycinae, are also frequently listed under their own family, the Erycidae.
List of boine species and subspecies
List of erycine species and subspecies
List of snakes, overview of all snake families and genera.
* Kluge AG. 1991. Boine Snake Phylogeny and Research Cycles. Misc. Pub. Museum of Zoology, Univ. of Michigan No. 178. [http://deepblue.lib.umich.edu/bitstream/2027.42/56422/1/MP178.pdf PDF] at [http://deepblue.lib.umich.edu/ University of Michigan Library] . Accessed
8 July 2008.
Wikimedia Foundation. 2010.
Look at other dictionaries:
Boidae — Saltar a navegación, búsqueda Este artículo trata de la familia de serpientes conocidas vulgarmente como boas. Para el género del mismo nombre, véase Boa. ? Boidae … Wikipedia Español
Boidae — Boidae … Wikipédia en Français
Boidae — ? Ложноногие змеи Анаконда Научная классификация Царство: Животные Тип … Википедия
Boidae — Riesenschlangen Regenbogenboa (Epicrates cenchria cenchria) Systematik Reihe: Landwirbeltiere … Deutsch Wikipedia
Boidae — Este artículo trata de la familia de serpientes conocidas vulgarmente como boas. Para el género del mismo nombre, véase Boa . Subfamilia Boinae Acrantophis Boa Candoia Corallus Epicrates Eunectes Sanzinia Subfamilia Erycinae Calabaria Charina… … Enciclopedia Universal
Boidae — noun boas and pythons • Syn: ↑family Boidae • Hypernyms: ↑reptile family • Member Holonyms: ↑Serpentes, ↑suborder Serpentes, ↑Ophidia, ↑suborder Ophidia … Useful english dictionary
boidae — bo·i·dae … English syllables
Семейство Ложноногие змеи (Boidae) — Семейство включает два подсемейства удавов (Boinae) и питонов (Pythoninae). В это семейство входят самые крупные из современных змей анаконда и сетчатый питон. Ложноногие имеют рудименты задних конечностей, обычно выступающие в виде… … Биологическая энциклопедия
family Boidae — noun boas and pythons • Syn: ↑Boidae • Hypernyms: ↑reptile family • Member Holonyms: ↑Serpentes, ↑suborder Serpentes, ↑Ophidia, ↑suborder Ophidia … Useful english dictionary
Boa (animal) — Boidae Boidae … Wikipédia en Français