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