Class Reptilia Classification Flashcards
Order Sphenodontia
tuataras
How many species in order Sphenodontia? Where?
2, New Zeland
What is the oldest living, nearly extinct order?
Sphenodontia
What does Sphenodontia feed on?
insects
what is special about Order Sphenodontia?
they have a parietal eye
parietal eye
“third eye”, middle of forehead, can detect light/dark
Order Testudines
turtles and tortoises
How many species in testudines
300
carapace
dorsal shell, made of bone
plastron
ventral shell, helps form girdles
how many shells does order Testudines have
2, carapace and plastron
why are testudines slow?
their shells inhibit movement
scutes
what covers testudines shells
do testudines have teeth
no, just a beak like structure
how long can a Galapagos tortoise live
100-200 years
turtle characteristics (4)
live in/near water; flat, streamlined shell; paddle like legs; omnivores
tortoise characteristics (4)
live on dry land; high domed shell; short, stumpy legs; herbivores
Order Squamata
snakes and lizards
how many species in order squamata
7,675 species
percentage of all reptiles in this order
Squamata
Suborder Serpentes
snakes
number of species in serpentes
3000
number of species in sauria
l4,675
Suborder Sauria
lizards
2 categories of serpentes
nonvenomous and venomous
examples of non venomous snakes
most snakes, black racer, indigo snake
how do most non venomous snakes kill their prey
hold prey against ground, swallow alive and eat
how to nonvenomous constrictor snakes kill their prey
squeezing and suffocating
examples of constrictor snakes
boa constrictor, python, anaconda, king snake, rat snake
how many snakes are venomous? (%)
less than 20%
how do venomous snakes kill their prey
injecting w/ venom through fangs
fangs characteristics (4)
front of mouth, large, hollow, curved
what toxins to venomous snakes have (2)
hemotoxin and neurotoxin
hemotoxin
blood
neurotoxin
interferes w/ nervous system functions
pit viper major characteristic
have deep pits on the side of its head that detects heat of warm blooded prey
shared characteristics of lizards and snakes (2)
kinetic skill and Jacobson’s organ
Jacobson’s organ
use flicking of tongue to pick up chemicals in air before running tongue along Jacobson’s Organ to detect specific smells
kinetic skull
joints in skull are flexible and allow for expansive movement to eat large prey; while swallowing large prey, glottis is moved between separation of mandible
glottis
opening of windpipe
Sauria characteristics (4)
4 legs, moveable eye lids, internal ear openings, some have detachable tails
Order Crocodylia
crocodiles, camens, alligators
how many species in Crocodylia
23
what does crocodylia eat
use strong jaw and sharp teeth to eat birds, fish, mammals, turtles
crocodylia skin
thick, covered by hard scales
crocodylia heart
4 chambers: 2 atria, 2 ventricles
how fast can crocodylia run
up to 10 mph
where are crocodylia eggs laid
in the ground, adult stays near to guard them
higher temp of crocodylia eggs produce
males
lower temp of crocodylia eggs produce
females
use of powerful crocodile tail (2)
quick swimming, weapon on land
how many crocodile species
14
where do crocodiles live
tropics, everglades, florida
crocodile nose shape
narrow, tapered snout
where do alligators live
southeast US and china
how many species of alligators
2