BIG ASS AMPHIBIAN LECTURE REVIEW Flashcards
What is the root meaning of herpetology?
herpeton (crawling thing) + logos (knowledge)
How many amphibian species are there on earth?
Around 8900
Organize the three amphibian orders by number of species within
Anura > Caudata > Gymnophiona
What does ectothermic mean?
Amphibians cannot produce their own body heat
When are most amphibians carnivorous?
As adults
What is special about amphibian tongues?
They can be launched as a projectile
What is special about amphibian saliva?
It can change viscosity from thick/sticky to watery
What is amphibian skin like?
Soft, moist, glandular
What weather event dictates amphibian breeding?
Rainfall
What is amplexus?
The position where a male grabs a female for mating
Which order mostly uses external fertilization?
Anurans
Which order mostly uses internal fertilization with copulation?
Gymnophiona
Which order uses internal fertilization but does not undergo copulation?
Caudata
Direct life cycle
An amphibian develops immediately into an adult stage from an egg
Indirect life cycle
An amphibian undergoes multiple stages before reaches its adult form
How is it possible for salamanders to undergo internal fertilization without copulating?
Through use of spermatophores
What is maternal dermatophagy?
When a caecilian grows extra tissue for its young to eat
What is a frog’s urostyle?
A pelvic shock absorber
True or false: Salamanders are mute.
True
What environment is absolutely crucial for most amphibian reproduction and development?
Isolated wetlands
Define paedomorph.
An amphibian (namely a caudate) that obtains sexual maturity in its larval stage due to water abundance.
Define eft.
An immature terrestrial adult. This form is achieved when conditions urge a larva to go on land.
True or false: Paedomorphs are incapable of developing further into terrestrial adults.
False
What are the five stages of frog development?
Egg, tadpole with tail, rear leg development, tail absorption and front leg growth, adult