Exam 2 Flashcards

Flaschcards for Exam 2 in Biol 453 Winter 2025

What are the key characteristics of lissamphibia?

Smooth and glandular skin
Bicuspid, pedicillate teeth
Short ribs
Hands with four fingers

What are the key characterisitcs of salamanders?

Tails through their whole lives
No external ear
Few dermal skull bones
Regenerative abiLITY

What are the key characteristics of gymnophiona?

Burrowers in the tropic
Limbless with small eyes
Chemosensory tentacle
Double row of teeth on upper jaw

What are the key characteristics of frogs?

Short vertebral column
Lumbar is fused to be urostyle for more muscles attatchments
No tails in adults
Fused radius/ulna and tibia/fibula
Long ankle bones similar to radius/ulna and tibia/fibula

What is A?

Reptiles

What is B?

Varanosaurus

What is C?

Dimetrodon

What is D?

Lycaenops

What is E?

Thrinaxodon

What is F?

Morganucodon

What is G?

Mammal

What is H?

Amniota

What is I?

Synapsida

What are J?

Lateral temporal fenestra
Canine tooth

What are K?

Coronoid process on dentary
Femur more upright
Thoracic and lumbar vertebrae

What are L?

Secondary palate
Complex post canine teeth

What are M?

No post orbital bar
Diphyodont teeth
Theuodont and gomphosis
Heterodont

Hagfish science name

Myxinoidea

Hagfish traits

No extrinsic eye muscles*
1 semicircular canal*
Slime*
Tissue isosmotic with sea water
Scavengers

Lamprey science name

Petromyzontiformes

Lamprey traits

Branchial basket*
Parasitic
2 semicircular canals

Cyclostomi animals

Hagfish
Lampreys

Cyclostomi traits

Molecular data
Keratinized teeth

Chondrichthyes animals

Sharks
Rays
Chimaeras

Chondrichthyes traits

Cartilaginous skeleton*
Pelvic claspers*
Ampullae of Lorenzini (electroreceptors)*

Osteichthyes traits

Bone
Foregut diverticulum (lung/swim bladder)*
Lepidotrichia*

Actinopterygii traits

Muscles do not extend to fins*

Sarcopterygii traits

Muscle into fin*
Monobasal*
Chonana*

Aquatic sacropterygii animals

Lungfish
Coelacanth

Heterostraci and arandapsida traits

No jaws
No paired fins
Dorsal and ventral bony shields of dermal bone*

Galeaspida traits

Median dorsal opening*
Fin folds?

Osteotraci traits

No jaws
Pectoral fins
Sensory fields*
Ossified neurocranium*
2 semicircular canals

Palodermi

Jaws with bone that looks like teeth*
Shields with articulations*
Pelvic fins
3 semicircular canals