SnakesBoidae - Old World Boas (western group) (what are the most important…
SnakesBoidae - Old World Boas (western group)
When did this family arise?
what ancestral group did it arise from?
what groups of vertebrates were its ancestors if any?
provide a simple cladogram/phylogeny for the family.
roughly 40 species of boas
how common or rare is the family in its ecosystems and what sorts of habitats did.does the family occupy?
descriptions and photographs (or illustrations) of representative members of the family,
what are the most important anatomical, physiological and behavioral characteristics of the family
similarities to pythond
relatively rigid lower jaw with a coronoid elemen['
boas have elongated supratemporal bones
The quadrate bones are also elongated
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 spurs are larger and more conspicuous than in females.
differences to pythond
none has postfrontal bones or premaxillary teeth, and that they give birth to live young
their geographical distributions are almost entirely mutually exclusive.
All boas are nonvenomous
to what degree did the family's characteristics contribute to its evolutionary success (adaptive radiation) or into danger of extinction, if known.
my specific snakes
B. dumerili (Duméril's boa)
B. madagascariensis (Madagascar ground boa)
B. manditra (Madagascar tree boa)
old world sand boas
their heads seemed attached to the body without distinction or bulbous appearance
Europe, Asia Minor, Africa, Arabia, India, Sri Lanka and Western North America