Chapter 34: Vertebrates Flashcards
1
Q
Chordates
A
- composed of invertebrates, vertebrate group
2
Q
Derived Characters
A
- Notochord
- Dorsal, hollow nerve chord
- Pharyngeal slits
- Post anal tail
3
Q
Chordate Characteristics
A
4
Q
Lancelets
A
- Belong to Subphylum Cephalochordata
- Basal chordates
- Lance shaped body
- Suspension feeders
5
Q
Tunicates
A
- Belong to Subphylum Urochordata
- Also called “sea squirts”
- Suspension feeders
- Lose many chordate characters as adults
6
Q
Vertebrates
A
- are chordates with a backbone
- All members also known as craniates
7
Q
Cyclostomes
A
- are a clade of living, jawless vertebrates
- Called the “round mouths”
- Include
- Hagfish
- Lampreys
8
Q
Hagfish
A
- Bottom dwelling, scavengers
- Can produce slime, used for defense
9
Q
Lampreys
A
- are filter feeders as larva
- Become parasites as adults
10
Q
Gnathostomes
A
- are a clade of jawed vertebrates
11
Q
Chondricthyes
A
- a clade of cartilaginous fish
- Have an endoskeleton made of cartilage
- Include
- Sharks
- Rays
- Ratfishes
12
Q
Osteichthyes
A
- a clade of “bony fish”… misleading
- Have an ossified endoskeleton
- Include
- Ray finned fish
- Lobe fins
13
Q
Ray Finned Fish
A
- Show the greatest vertebrate diversity
- Have fins made of bony rays
14
Q
Lobe-Fins
A
- Fins made of rod shaped bones
- Bones surrounded by thick muscles
- Three lineages
- Coelacanths
- Lungfishes
- Tetrapods
15
Q
Tetrapods
A
- are gnathastomes that have limbs with digits
- Include groups
- Amphibians
- Amniotes