Lecture 51/52: Reptile basics Flashcards
what is the difference between Chelonians and Squamata
Chelonians: includes terrapins, tortoises, & turtles
Squamata: includes lizards & snakes
T/F Chelonians and Squamata both have no extant reptiles in Antarctica
true
what is this showing
Skeletal components of vestigial femur within the pelvic spur
Snakes, some boids, including both pythons and boa constrictors, have pelvic _____________ with bony components of their skeletal system
pelvic remnants (vestigial femur w/in spurs)
Boas & Pythons often possess ____
spurs
what is this showing on a boa/python
spur
what is important to note about Chelonians vertebrae
The only vertebrate group in which The pectoral girdle is contained inside of the rib cage
identify the parts of chelonian shell
what is the green circle indicating
Only vertebrate group in which the pectoral girdle is contained inside of the rib cage
what is the Jacobson’s organ critical for
detecting scents, odors, and chemical information from the reptile’s environment
Reptile flicks tongue into & across dorsal aspect of oral cavity to capture ____________
chemical signals within the environment
where is the heart located in the snake
w/in cranial 25 to 30 % of body length
OR cranial 1/3 of body length
T/F Reptilian heart is 3 chambered
true
Phlebotomy sites in Chelonians:
why is the jugular vein blood collection beneficial
least lymph contamination!
which blood collection site in Chelonians is moderately difficult
Brachial vein blood collection
which blood collection site in Chelonians is even more difficult to obtain compared to the Brachial vein
Dorsal tail vein blood collection
what Phlebotomy sites in Chelonians is nice due to the ease of access
Dorsal vertebral sinus blood collection
Jugular vein blood collection: least lymph contamination!
Dorsal vertebral sinus blood collection
Dorsal tail vein blood collection
Brachial vein blood collection
Phlebotomy sites in Squamata:
Specifically snakes
which blood collection sites have low risk
Coccygeal “tail” vein phlebotomy site: low risk/ low difficulty
and
Cardiac phlebotomy site: low to moderate risk/ low to moderate difficulty
what Phlebotomy site in Squamata has a low risk but high level of difficulty
Palatine vein phlebotomy site
which Phlebotomy sites is being used
Coccygeal “tail” vein phlebotomy
which Phlebotomy sites is being used
Palatine vein phlebotomy site
which Phlebotomy sites is being used
Cardiac phlebotomy site
which lung is this
Close-up of right lung
(this is a terrible photo but I dont know what nadar is gonna ask)
Turtle Respiratory Radiographs
what is the minimum amount of images that have to be taken
3!
what view is this
Dorsal / Ventral view: lung fields revealed
Lateral view : lung fields revealed
Cranial / Caudal view: lung fields revealed
Comparison of brain location and size in various Sea Turtle species:
Chelonian Nervous System:
which one is the feline brain vs. leatherback turtle
top) cat (Felis catus), ~3.9 kg body mass
(bottom) leatherback turtle (Dermochelys coriacea), ~ 350 kg body mass
I KNOW ITS OBVIOUS:)
Galapagos tortoises mating
which is male or female
How can you tell if a turtle is a male or female
based on shell, tail, plastron
shell length= females are longer
tail= males have a notch
plastron= male is concave
How can you tell if a turtle is a male or female:
claws,tail size, species, cloaca
claws: males are longer
tail size: male longer and thicker
species: certain ones have gender specifics
cloaca: female is much rounder and looks like a star
what is this showing
Male hemipenes placed within female vent
what is this showing
Pueblian Milk snakes entwined in mating pose
In male snakes, hemipenes become engorged with _________ rather than whole blood as in mammals
lymph fluid
what is a Hemipenes
male phallic organs, bilaterally symmetrical
what is this showing
Western Garter Snake – mating ball in
Summer breeding season
Venomous Reptiles of North America:
4 Snakes types
Eastern Diamondback Rattlesnake
Cottonmouth moccasin
Eastern Coral snake
Copperhead snake
Coral snakes–Rear-Fanged Venomous snake; highest percentage of neurotoxins in venom
Copperhead snakes
Rattlesnakes–Pit Viper group
Cottonmouth moccasin–Pit Viper group
what is this showing
Infra-red heat detection organ
Venomous Reptiles of North America:
2 Lizard types
Gila monster: Heloderma suspectum
Beaded lizard: Heloderma horridum
Venomous Reptiles of North America
2 Lizard types:
Gila monster: Heloderma suspectum
1 species
Venomous Reptiles of North America
2 Lizard types:
Beaded lizard: Heloderma horridum
3 species
what is this showing
Approximate range of venomous lizards in N. America
